{"id":88870,"date":"2025-07-01T21:20:03","date_gmt":"2025-07-01T14:20:03","guid":{"rendered":"https:\/\/itviec.com\/blog\/?p=88870"},"modified":"2025-07-01T21:20:06","modified_gmt":"2025-07-01T14:20:06","slug":"swift-vs-objective-c","status":"publish","type":"post","link":"https:\/\/itviec.com\/blog\/swift-vs-objective-c\/","title":{"rendered":"Swift vs Objective-C: N\u00ean h\u1ecdc ng\u00f4n ng\u1eef n\u00e0o khi l\u1eadp tr\u00ecnh iOS?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed9i dung b\u00e0i vi\u1ebft<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/itviec.com\/blog\/swift-vs-objective-c\/#Swift_va_Objective-C_la_gi\" >Swift v\u00e0 Objective-C l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/itviec.com\/blog\/swift-vs-objective-c\/#Swift_vs_Objective-C_khac_nhau_o_nhung_diem_nao\" >Swift vs Objective-C kh\u00e1c nhau \u1edf nh\u1eefng \u0111i\u1ec3m n\u00e0o?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/itviec.com\/blog\/swift-vs-objective-c\/#Swift_vs_Objective-C_Nen_hoc_ngon_ngu_nao\" >Swift vs Objective-C: N\u00ean h\u1ecdc ng\u00f4n ng\u1eef n\u00e0o?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/itviec.com\/blog\/swift-vs-objective-c\/#Co_hoi_viec_lam_cua_Swift_vs_Objective-C\" >C\u01a1 h\u1ed9i vi\u1ec7c l\u00e0m c\u1ee7a Swift vs Objective-C<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/itviec.com\/blog\/swift-vs-objective-c\/#Cac_cau_hoi_thuong_gap_ve_Swift_vs_Objective-C\" >C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 Swift vs Objective-C<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/itviec.com\/blog\/swift-vs-objective-c\/#Tong_ket\" >T\u1ed5ng k\u1ebft<\/a><\/li><\/ul><\/nav><\/div>\n\n<p><strong><em>M\u1eb7c d\u00f9 c\u00e1c \u1ee9ng d\u1ee5ng m\u1edbi tr\u00ean Apple hi\u1ec7n nay \u0111\u00e3 d\u1ea7n chuy\u1ec3n sang Swift, nh\u01b0ng kh\u00f4ng c\u00f3 ngh\u0129a Objective-C b\u1ecb \u201cx\u00f3a s\u1ed5\u201d. Nhi\u1ec1u c\u00f4ng ty v\u1eabn \u0111ang duy tr\u00ec c\u01a1 s\u1edf m\u00e3 ngu\u1ed3n (codebase) b\u1eb1ng ng\u00f4n ng\u1eef n\u00e0y. N\u1ebfu b\u1ea1n \u0111ang ph\u00e2n v\u00e2n l\u1ef1a ch\u1ecdn Swift vs Objective-C \u0111\u1ec3 b\u1eaft \u0111\u1ea7u, b\u00e0i vi\u1ebft n\u00e0y ch\u00ednh l\u00e0 d\u00e0nh cho b\u1ea1n.<\/em><\/strong><\/p>\n\n\n\n<p>\u0110\u1ecdc b\u00e0i vi\u1ebft \u0111\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Swift v\u00e0 Objective-C l\u00e0 g\u00ec?<\/li>\n\n\n\n<li>Swift vs Objective-C kh\u00e1c nhau \u1edf nh\u1eefng \u0111i\u1ec3m n\u00e0o?<\/li>\n\n\n\n<li>Khi n\u00e0o n\u00ean h\u1ecdc Swift?<\/li>\n\n\n\n<li>Khi n\u00e0o n\u00ean h\u1ecdc Objective-C?<\/li>\n\n\n\n<li>Th\u1ecb tr\u01b0\u1eddng vi\u1ec7c l\u00e0m gi\u1eefa Swift vs Objective-C<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-swift-va-objective-c-la-gi\"><span class=\"ez-toc-section\" id=\"Swift_va_Objective-C_la_gi\"><\/span><strong>Swift v\u00e0 Objective-C l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-swift-la-gi\"><strong>Swift l\u00e0 g\u00ec?<\/strong><\/h3>\n\n\n\n<p>Swift l\u00e0 ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh hi\u1ec7n \u0111\u1ea1i, \u0111a m\u1ee5c \u0111\u00edch \u0111\u01b0\u1ee3c Apple ph\u00e1t tri\u1ec3n \u0111\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c \u1ee9ng d\u1ee5ng trong h\u1ec7 sinh th\u00e1i nh\u01b0 iOS, macOS, Apple TV, Apple watch.&nbsp;<\/p>\n\n\n\n<p>Ng\u00f4n ng\u1eef n\u00e0y h\u1ed7 tr\u1ee3 linh ho\u1ea1t nhi\u1ec1u phong c\u00e1ch l\u1eadp tr\u00ecnh kh\u00e1c nhau nh\u01b0 h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng, l\u1eadp tr\u00ecnh h\u00e0m (functional programming), \u0111\u1eb7c bi\u1ec7t l\u00e0 kh\u1ea3 n\u0103ng t\u1ed5 ch\u1ee9c m\u00e3 b\u1eb1ng closures &#8211; c\u00e1c kh\u1ed1i m\u00e3 c\u00f3 th\u1ec3 g\u00e1n v\u00e0o bi\u1ebfn, truy\u1ec1n l\u00e0m \u0111\u1ed1i s\u1ed1 v\u00e0 th\u1ef1c thi linh ho\u1ea1t, gi\u00fap m\u00e3 ng\u1eafn g\u1ecdn, d\u1ec5 hi\u1ec3u h\u01a1n.<\/p>\n\n\n\n<p>Xu h\u01b0\u1edbng l\u1eadp tr\u00ecnh Swift hi\u1ec7n \u0111\u1ea1i l\u00e0 c\u1ed1 g\u1eafng s\u1eed d\u1ee5ng POP (protocol-oriented programming) k\u1ebft h\u1ee3p v\u1edbi Struct, thay v\u00ec s\u1eed d\u1ee5ng Class. POP l\u00e0 ph\u01b0\u01a1ng ph\u00e1p l\u1eadp tr\u00ecnh thi\u1ebft k\u1ebf v\u00e0 l\u00e0m vi\u1ec7c \u01b0u ti\u00ean v\u1edbi c\u00e1c Protocol, thay v\u00ec Class nh\u01b0 OOP. Protocol linh ho\u1ea1t h\u01a1n Class; instance c\u1ee7a Struct \u0111\u01b0\u1ee3c c\u1ea5p ph\u00e1t tr\u00ean Stack, c\u00f2n instance c\u1ee7a Class \u0111\u01b0\u1ee3c c\u1ea5p ph\u00e1t tr\u00ean Heap n\u00ean ph\u01b0\u01a1ng ph\u00e1p n\u00e0y th\u1ef1c thi t\u1ed1t h\u01a1n.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Apple t\u1ea1i WWDC \u0111\u00e3 n\u00f3i m\u1ed9t c\u00e2u r\u1ea5t hay v\u1ec1 Swift: \u201cTHINK ABOUT PROTOCOL FIRST\u201d.<\/p>\n<\/blockquote>\n\n\n\n<p>L\u00e0 m\u00e3 ngu\u1ed3n m\u1edf v\u00e0 ho\u00e0n to\u00e0n mi\u1ec5n ph\u00ed, Swift v\u1eeba ph\u1ee5c v\u1ee5 t\u1ed1t cho h\u1ec7 sinh th\u00e1i Apple, v\u1eeba \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u n\u1ec1n t\u1ea3ng b\u00ean ngo\u00e0i kh\u00e1c.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-objective-c-la-gi\"><strong>Objective-C l\u00e0 g\u00ec?<\/strong><\/h3>\n\n\n\n<p>Tr\u01b0\u1edbc khi Swift ra \u0111\u1eddi, Apple \u0111\u00e3 s\u1eed d\u1ee5ng Objective-C \u0111\u1ec3 ph\u00e1t tri\u1ec3n c\u00e1c \u1ee9ng d\u1ee5ng trong h\u1ec7 sinh th\u00e1i c\u1ee7a m\u00ecnh. Objective-C l\u00e0 m\u1ed9t t\u1eadp h\u1ee3p con (superset) c\u1ee7a ng\u00f4n ng\u1eef C v\u00e0 \u0111\u01b0\u1ee3c b\u1ed5 sung th\u00eam c\u00e1c t\u00ednh n\u0103ng l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng.<\/p>\n\n\n\n<p>Objective-C c\u00f3 c\u00fa ph\u00e1p \u0111\u1eb7c tr\u01b0ng s\u1eed d\u1ee5ng nhi\u1ec1u d\u1ea5u ngo\u1eb7c vu\u00f4ng khi g\u1ecdi ph\u01b0\u01a1ng th\u1ee9c, kh\u00e1c bi\u1ec7t ho\u00e0n to\u00e0n so v\u1edbi c\u00e1c ng\u00f4n ng\u1eef hi\u1ec7n \u0111\u1ea1i nh\u01b0 Swift, JavaScript hay Python.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><em>\u0110\u1ecdc th\u00eam: <strong><a href=\"https:\/\/itviec.com\/blog\/objective-c-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">Objective-C l\u00e0 g\u00ec? C\u00f3 c\u00f2n ph\u00f9 h\u1ee3p \u0111\u1ec3 h\u1ecdc trong n\u0103m 2025?<\/a><\/strong><\/em><\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-swift-vs-objective-c-khac-nhau-\u1edf-nh\u1eefng-di\u1ec3m-nao\"><span class=\"ez-toc-section\" id=\"Swift_vs_Objective-C_khac_nhau_o_nhung_diem_nao\"><\/span><strong>Swift vs Objective-C kh\u00e1c nhau \u1edf nh\u1eefng \u0111i\u1ec3m n\u00e0o?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Ti\u00eau ch\u00ed<\/strong><\/td><td><strong>Objective-C<\/strong><\/td><td><strong>Swift<\/strong><\/td><\/tr><tr><td>T\u00ednh ch\u1ea5t<\/td><td>Objective-C l\u00e0 m\u1ed9t ng\u00f4n ng\u1eef t\u0129nh, nh\u01b0ng n\u00f3 c\u00f3 c\u00e1c t\u00ednh n\u0103ng c\u1ee7a ki\u1ec3u \u0111\u1ed9ng (dynamic typing) m\u1ea1nh m\u1ebd h\u01a1n Swift, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong vi\u1ec7c g\u1eedi th\u00f4ng \u0111i\u1ec7p (message sending) v\u00e0 introspecting (t\u1ef1 ki\u1ec3m tra) \u0111\u1ed1i t\u01b0\u1ee3ng t\u1ea1i th\u1eddi \u0111i\u1ec3m ch\u1ea1y (runtime).<br>Objective-C c\u00f3 th\u1ec3 khai b\u00e1o bi\u1ebfn v\u1edbi ki\u1ec3u id (m\u1ed9t con tr\u1ecf t\u1edbi b\u1ea5t k\u1ef3 \u0111\u1ed1i t\u01b0\u1ee3ng n\u00e0o) v\u00e0 vi\u1ec7c g\u1ecdi ph\u01b0\u01a1ng th\u1ee9c tr\u00ean id \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft \u1edf runtime.<\/td><td>Swift l\u00e0 m\u1ed9t ng\u00f4n ng\u1eef ki\u1ec3u t\u0129nh (statically-typed). Tr\u00ecnh bi\u00ean d\u1ecbch ki\u1ec3m tra ki\u1ec3u d\u1eef li\u1ec7u t\u1ea1i th\u1eddi \u0111i\u1ec3m bi\u00ean d\u1ecbch (compile-time), gi\u00fap ph\u00e1t hi\u1ec7n l\u1ed7i s\u1edbm.&nbsp;Swift c\u00f3 type inference (suy lu\u1eadn ki\u1ec3u) gi\u00fap code tr\u00f4ng g\u1ecdn h\u01a1n, nh\u01b0ng b\u1ea3n ch\u1ea5t n\u00f3 v\u1eabn l\u00e0 static-typed.<\/td><\/tr><tr><td>M\u1ee5c \u0111\u00edch<\/td><td>\u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf theo phong c\u00e1ch truy\u1ec1n th\u00f4ng \u0111i\u1ec7p (messaging) ki\u1ec3u smalltalk.<\/td><td>\u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 x\u00e2y d\u1ef1ng \u1ee9ng d\u1ee5ng cho iOS, MacOS, Apple TV, Apple Watch.<\/td><\/tr><tr><td>T\u00ednh \u1ed5n \u0111\u1ecbnh<\/td><td>\u1ed4n \u0111\u1ecbnh tr\u00ean nhi\u1ec1u n\u1ec1n t\u1ea3ng nh\u1edd l\u1ecbch s\u1eed ph\u00e1t tri\u1ec3n l\u00e2u d\u00e0i.<\/td><td>\u0110ang ph\u00e1t tri\u1ec3n nhanh, th\u01b0\u1eddng xuy\u00ean c\u1eadp nh\u1eadt, n\u00ean c\u00f3 th\u1ec3 kh\u00f4ng \u1ed5n \u0111\u1ecbnh b\u1eb1ng trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p.<\/td><\/tr><tr><td>C\u00fa ph\u00e1p<\/td><td>D\u00e0i d\u00f2ng, kh\u00f3 \u0111\u1ecdc v\u00e0 kh\u00f3 h\u1ecdc \u0111\u1ed1i v\u1edbi ng\u01b0\u1eddi m\u1edbi.<\/td><td>\u0110\u01a1n gi\u1ea3n, tr\u1ef1c quan, d\u1ec5 h\u1ecdc.<\/td><\/tr><tr><td>Hi\u1ec7u n\u0103ng<\/td><td>C\u00f3 th\u1ec3 ch\u1eadm h\u01a1n do x\u1eed l\u00fd nhi\u1ec1u \u1edf runtime (\u0111\u1eb7c bi\u1ec7t l\u00e0 message dispatch), tr\u1eeb khi d\u00f9ng h\u00e0m C<\/td><td>Hi\u1ec7u n\u0103ng cao h\u01a1n trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p nh\u1edd v\u00e0o static dispatch v\u00e0 t\u1ed1i \u01b0u tr\u00ecnh bi\u00ean d\u1ecbch. Tuy nhi\u00ean, hi\u1ec7u su\u1ea5t th\u1ef1c t\u1ebf ph\u1ee5 thu\u1ed9c v\u00e0o t\u1eebng t\u00ecnh hu\u1ed1ng c\u1ee5 th\u1ec3.<\/td><\/tr><tr><td>\u0110\u1ed9 an to\u00e0n<\/td><td>D\u1ec5 b\u1ecb b\u1ecf s\u00f3t l\u1ed7i, \u0111\u1eb7c bi\u1ec7t l\u00e0 l\u1ed7i runtime v\u00e0 crash app n\u1ebfu kh\u00f4ng ki\u1ec3m so\u00e1t k\u1ef9. Vi\u1ec7c s\u1eeda l\u1ed7i c\u00f3 th\u1ec3 m\u1ea5t nhi\u1ec1u th\u1eddi gian<\/td><td>An to\u00e0n h\u01a1n do c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n, s\u1eeda l\u1ed7i trong l\u00fac bi\u00ean d\u1ecbch (compile-time).Ngo\u00e0i ra c\u00f2n c\u00f3 h\u1ec7 th\u1ed1ng optionals gi\u00fap tr\u00e1nh \u0111\u01b0\u1ee3c nhi\u1ec1u l\u1ed7i Crash app kh\u00f4ng ng\u1edd \u0111\u1ebfn.<\/td><\/tr><tr><td>H\u1ed7 tr\u1ee3 l\u1eadp tr\u00ecnh generics<\/td><td>Ch\u1ec9 h\u1ed7 tr\u1ee3 class, generics\/ template h\u1ea1n ch\u1ebf. T\u1eeb Xcode 7 c\u00f3 &#8220;lightweight generics&#8221; nh\u01b0ng v\u1eabn k\u00e9m linh ho\u1ea1t h\u01a1n so v\u1edbi Swift.<\/td><td>H\u1ed7 tr\u1ee3 c\u1ea3 structs v\u00e0 classes. H\u1ed7 tr\u1ee3 nhi\u1ec1u lo\u1ea1i generic\/template so v\u1edbi Objective-C.<\/td><\/tr><tr><td>B\u1ea3o tr\u00ec m\u00e3 ngu\u1ed3n<\/td><td>M\u00e3 ngu\u1ed3n \u0111\u01b0\u1ee3c chia th\u00e0nh hai file ri\u00eang bi\u1ec7t (khai b\u00e1o v\u00e0 c\u00e0i \u0111\u1eb7t)<\/td><td>M\u1ecdi m\u00e3 ngu\u1ed3n \u0111\u01b0\u1ee3c l\u01b0u trong m\u1ed9t file duy nh\u1ea5t<\/td><\/tr><tr><td>Qu\u1ea3n l\u00fd b\u1ed9 nh\u1edb<\/td><td>H\u1ed7 tr\u1ee3 t\u1ef1 \u0111\u1ed9ng \u0111\u1ebfm tham chi\u1ebfu (ARC) cho c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng Objective-C. C\u1ea7n qu\u1ea3n l\u00fd b\u1ed9 nh\u1edb th\u1ee7 c\u00f4ng khi l\u00e0m vi\u1ec7c v\u1edbi c\u00e1c API C nh\u01b0 Core Foundation, tr\u1eeb khi s\u1eed d\u1ee5ng toll-free bridging<\/td><td>An to\u00e0n v\u1ec1 ki\u1ec3u v\u00e0 b\u1ed9 nh\u1edb, h\u1ed7 tr\u1ee3 ARC to\u00e0n di\u1ec7n v\u00e0 m\u1eb7c \u0111\u1ecbnh<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Sau \u0111\u00e2y, ITviec s\u1ebd ph\u00e2n t\u00edch r\u00f5 h\u01a1n s\u1ef1 kh\u00e1c nhau gi\u1eefa Objective-C v\u00e0 Swift theo t\u1eebng ti\u00eau ch\u00ed c\u1ee5 th\u1ec3:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-cu-phap-va-kh\u1ea3-nang-d\u1ecdc-gi\u1eefa-swift-vs-objective-c\"><strong>C\u00fa ph\u00e1p v\u00e0 kh\u1ea3 n\u0103ng \u0111\u1ecdc gi\u1eefa Swift vs Objective-C<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Objective-C:<\/strong> C\u00fa ph\u00e1p d\u00e0i v\u00e0 kh\u00f3 \u0111\u1ecdc h\u01a1n<\/li>\n\n\n\n<li><strong>Swift: <\/strong>C\u00fa ph\u00e1p hi\u1ec7n \u0111\u1ea1i, d\u1ec5 \u0111\u1ecdc<\/li>\n<\/ul>\n\n\n\n<p>Objective-C mang phong c\u00e1ch l\u1eadp tr\u00ecnh t\u1eeb ng\u00f4n ng\u1eef C n\u00ean c\u00fa ph\u00e1p ph\u1ee9c t\u1ea1p, nhi\u1ec1u d\u1ea5u \u0111\u1eb7c bi\u1ec7t, \u0111\u00f2i h\u1ecfi vi\u1ebft c\u1ea3 file .h v\u00e0 .m \u0111\u1ec3 \u0111\u1ecbnh ngh\u0129a v\u00e0 tri\u1ec3n khai. Trong khi \u0111\u00f3, Swift \u0111\u00e3 \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf h\u1ea7u nh\u01b0 c\u00e1c y\u1ebfu t\u1ed1 ph\u1ee9c t\u1ea1p n\u00e0y.&nbsp;<\/p>\n\n\n\n<p><strong>V\u00ed d\u1ee5:<\/strong> C\u00f9ng m\u1ed9t ch\u01b0\u01a1ng tr\u00ecnh \u201cHello, World!\u201d khi l\u1eadp tr\u00ecnh b\u1eb1ng Swift vs Objective-C.<\/p>\n\n\n\n<p><strong>Swift:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>print(\"Hello, World!\")<\/code><\/pre>\n\n\n\n<p><strong>Objective-C:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#import &lt;Foundation\/Foundation.h>\nint main(int argc, const char * argv&#91;]) {\n@autoreleasepool {\nNSLog(@\"Hello, World!\");\n}\nreturn 0;\n}<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><em>\u0110\u1ecdc th\u00eam: <strong><a href=\"https:\/\/itviec.com\/blog\/objective-c-tutorial\/\" target=\"_blank\" rel=\"noreferrer noopener\">Objective-C tutorial: 14 ng\u00e0y t\u1ef1 h\u1ecdc hi\u1ec7u qu\u1ea3 qua v\u00ed d\u1ee5 th\u1ef1c t\u1ebf<\/a><\/strong><\/em><\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-hi\u1ec7u-su\u1ea5t-va-hi\u1ec7u-qu\u1ea3-gi\u1eefa-swift-vs-objective-c\"><strong>Hi\u1ec7u su\u1ea5t v\u00e0 hi\u1ec7u qu\u1ea3 gi\u1eefa Swift vs Objective-C<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Objective-C: <\/strong>Linh ho\u1ea1t nh\u01b0ng c\u00f3 th\u1ec3 ch\u1eadm h\u01a1n Swift<\/li>\n\n\n\n<li>S<strong>wift: <\/strong>Thi\u1ebft k\u1ebf \u0111\u1ec3 t\u1ed1i \u01b0u hi\u1ec7u n\u0103ng<\/li>\n<\/ul>\n\n\n\n<p>Objective-C n\u1ed5i b\u1eadt v\u1edbi t\u00ednh \u0111\u1ed9ng (dynamic), th\u1ec3 hi\u1ec7n qua c\u01a1 ch\u1ebf g\u1ecdi h\u00e0m theo ki\u1ec3u \u201ctruy\u1ec1n tin nh\u1eafn\u201d (message passing) v\u00e0 kh\u1ea3 n\u0103ng x\u1eed l\u00fd linh ho\u1ea1t v\u1edbi c\u00e1c ki\u1ec3u d\u1eef li\u1ec7u. Tuy nhi\u00ean, ch\u00ednh \u0111\u1eb7c \u0111i\u1ec3m n\u00e0y l\u1ea1i l\u00e0 nguy\u00ean nh\u00e2n ti\u1ec1m \u1ea9n g\u00e2y ra overhead v\u1ec1 hi\u1ec7u su\u1ea5t &#8211; do ph\u1ea3i d\u1ef1a v\u00e0o dynamic dispatch v\u00e0 x\u1eed l\u00fd t\u1ea1i th\u1eddi \u0111i\u1ec3m ch\u1ea1y (runtime), khi\u1ebfn t\u1ed1c \u0111\u1ed9 th\u1ef1c thi c\u00f3 th\u1ec3 ch\u1eadm h\u01a1n trong m\u1ed9t s\u1ed1 t\u00ecnh hu\u1ed1ng.<\/p>\n\n\n\n<p>Ng\u01b0\u1ee3c l\u1ea1i, Swift \u0111\u01b0\u1ee3c Apple thi\u1ebft k\u1ebf \u0111\u1ec3 \u201cnhanh ngay t\u1eeb b\u00ean trong\u201d. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng tr\u00ecnh bi\u00ean d\u1ecbch hi\u1ec7n \u0111\u1ea1i LLVM, cho ph\u00e9p t\u1ed1i \u01b0u m\u00e3 ngay trong qu\u00e1 tr\u00ecnh bi\u00ean d\u1ecbch (compile-time) gi\u00fap t\u0103ng t\u1ed1c \u0111\u1ed9 th\u1ef1c thi.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-d\u1ed9-an-toan-va-x\u1eed-ly-l\u1ed7i-gi\u1eefa-swift-vs-objective-c\"><strong>\u0110\u1ed9 an to\u00e0n v\u00e0 x\u1eed l\u00fd l\u1ed7i gi\u1eefa Swift vs Objective-C<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Objective-C<\/strong>: Linh ho\u1ea1t nh\u01b0ng r\u1ee7i ro cao h\u01a1n Swift<\/li>\n\n\n\n<li><strong>Swift: <\/strong>\u01afu ti\u00ean an to\u00e0n ngay t\u1eeb thi\u1ebft k\u1ebf<\/li>\n<\/ul>\n\n\n\n<p>V\u1edbi c\u00e1c t\u00ednh n\u0103ng \u0111\u1ed9ng m\u1ea1nh m\u1ebd, Objective-C cho ph\u00e9p s\u1ef1 linh ho\u1ea1t nh\u01b0ng c\u0169ng \u0111i k\u00e8m r\u1ee7i ro v\u1ec1 l\u1ed7i runtime nh\u01b0 con tr\u1ecf nil (null pointer)&#8230; Vi\u1ec7c \u201cqu\u00ean gi\u1ea3i ph\u00f3ng b\u1ed9 nh\u1edb\u201d ch\u1ee7 y\u1ebfu l\u00e0 v\u1ea5n \u0111\u1ec1 tr\u01b0\u1edbc khi c\u00f3 ARC ho\u1eb7c khi l\u00e0m vi\u1ec7c v\u1edbi c\u00e1c API C c\u1ea5p th\u1ea5p (Core Foundation). V\u1edbi ARC, v\u1ea5n \u0111\u1ec1 n\u00e0y gi\u1ea3m thi\u1ec3u \u0111\u00e1ng k\u1ec3 cho \u0111\u1ed1i t\u01b0\u1ee3ng Objective-C.<\/p>\n\n\n\n<p>Trong khi \u0111\u00f3, Swift \u0111\u01b0\u1ee3c Apple thi\u1ebft l\u1eadp c\u00e1c t\u00ednh n\u0103ng nh\u01b0 ki\u1ec3u d\u1eef li\u1ec7u t\u0129nh (static typing), t\u00f9y ch\u1ecdn (optionals) v\u00e0 x\u1eed l\u00fd l\u1ed7i r\u00f5 r\u00e0ng b\u1eb1ng do-catch gi\u00fap l\u1eadp tr\u00ecnh vi\u00ean d\u1ec5 d\u00e0ng ph\u00e1t hi\u1ec7n l\u1ed7i ngay t\u1eeb khi bi\u00ean d\u1ecbch, thay v\u00ec ch\u1edd \u0111\u1ebfn l\u00fac ch\u1ea1y.<\/p>\n\n\n\n<p><strong>V\u00ed d\u1ee5: <\/strong>X\u1eed l\u00fd l\u1ed7i b\u1eb1ng Swift vs Objective-C:<\/p>\n\n\n\n<p><strong>Swift:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>do {\nlet data = try fetchData()\nprint(data)\n} catch {\nprint(\"An error occurred: \\(error)\")\n}<\/code><\/pre>\n\n\n\n<p><strong>Objective-C:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>NSError *error = nil;\nNSData *data = &#91;self fetchData:&amp;error];\nif (error) {\nNSLog(@\"An error occurred: %@\", error);\n} else {\nNSLog(@\"%@\", data);\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-t\u1ed1c-d\u1ed9-phat-tri\u1ec3n-va-nang-su\u1ea5t-gi\u1eefa-swift-vs-objective-c\"><strong>T\u1ed1c \u0111\u1ed9 ph\u00e1t tri\u1ec3n v\u00e0 n\u0103ng su\u1ea5t gi\u1eefa Swift vs Objective-C<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Objective-C: <\/strong>\u1ed4n \u0111\u1ecbnh, ph\u00f9 h\u1ee3p v\u1edbi h\u1ec7 th\u1ed1ng c\u0169<\/li>\n\n\n\n<li><strong>Swift:<\/strong> Hi\u1ec7n \u0111\u1ea1i, h\u1ed7 tr\u1ee3 t\u1ed1i \u0111a n\u0103ng su\u1ea5t<\/li>\n<\/ul>\n\n\n\n<p>Swift \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 gi\u00fap l\u1eadp tr\u00ecnh vi\u00ean ph\u00e1t tri\u1ec3n nhanh h\u01a1n v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n nh\u1edd c\u00fa ph\u00e1p hi\u1ec7n \u0111\u1ea1i, t\u1ef1 \u0111o\u00e1n ki\u1ec3u d\u1eef li\u1ec7u (type inference) v\u00e0 c\u00e1c t\u00ednh n\u0103ng th\u00e2n thi\u1ec7n nh\u01b0 th\u1eed nghi\u1ec7m code tr\u1ef1c ti\u1ebfp (Xcode + Swift Playground), ch\u1ec9nh UI v\u00e0 th\u1ea5y thay \u0111\u1ed5i theo th\u1eddi gian th\u1ef1c (Live Preview trong SwiftUI).<\/p>\n\n\n\n<p>Trong khi \u0111\u00f3, Objective-C d\u00f9 s\u1edf h\u1eefu r\u1ea5t nhi\u1ec1u th\u01b0 vi\u1ec7n, framework iOS nh\u01b0ng do c\u00fa ph\u00e1p d\u00e0i d\u00f2ng, c\u1ea7n nhi\u1ec1u b\u01b0\u1edbc khai b\u00e1o n\u00ean d\u1ec5 m\u1ea5t th\u1eddi gian cho nh\u1eefng t\u00e1c v\u1ee5 c\u01a1 b\u1ea3n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-kh\u1ea3-nang-t\u01b0\u01a1ng-tac-va-tich-h\u1ee3p-gi\u1eefa-swift-vs-objective-c\"><strong>Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c v\u00e0 t\u00edch h\u1ee3p gi\u1eefa Swift vs Objective-C<\/strong><\/h3>\n\n\n\n<p>M\u1ed9t trong nh\u1eefng \u01b0u \u0111i\u1ec3m l\u1edbn nh\u1ea5t khi d\u00f9ng Swift trong d\u1ef1 \u00e1n iOS l\u00e0 kh\u1ea3 n\u0103ng t\u00edch h\u1ee3p m\u01b0\u1ee3t m\u00e0 v\u1edbi Objective-C. L\u1eadp tr\u00ecnh vi\u00ean c\u00f3 th\u1ec3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>G\u1ecdi m\u00e3 Swift t\u1eeb Objective-C<\/li>\n\n\n\n<li>D\u00f9ng m\u00e3 Objective-C trong m\u1ed9t file Swift<\/li>\n<\/ul>\n\n\n\n<p>T\u1eeb \u0111\u00f3 c\u00f3 th\u1ec3 chuy\u1ec3n d\u1ea7n sang Swift m\u00e0 kh\u00f4ng c\u1ea7n vi\u1ebft l\u1ea1i to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng, r\u1ea5t ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c d\u1ef1 \u00e1n l\u1edbn \u0111ang ch\u1ea1y b\u1eb1ng Objective-C.<\/p>\n\n\n\n<p><strong>V\u00ed d\u1ee5:<\/strong><\/p>\n\n\n\n<p><strong>Swift:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>let objCObject = MyClass()\nobjCObject.performAction()<\/code><\/pre>\n\n\n\n<p><strong>Objective-C:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>MySwiftClass *swiftObject = &#91;&#91;MySwiftClass alloc] init];\n&#91;swiftObject performAction];<\/code><\/pre>\n\n\n\n<p><strong>Ghi ch\u00fa:<\/strong> \u0110\u1ec3 g\u1ecdi c\u00e1c l\u1edbp Swift t\u1eeb m\u00e3 Objective-C, c\u1ea7n import file ti\u00eau \u0111\u1ec1 t\u1ef1 \u0111\u1ed9ng sinh c\u00f3 t\u00ean d\u1ea1ng <code>&lt;ProductName>-Swift.h<\/code> v\u00e0o file .m t\u01b0\u01a1ng \u1ee9ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-c\u1ed9ng-d\u1ed3ng-h\u1ed7-tr\u1ee3-gi\u1eefa-swift-vs-objective-c\"><strong>C\u1ed9ng \u0111\u1ed3ng h\u1ed7 tr\u1ee3 gi\u1eefa Swift vs Objective-C<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Swift: <\/strong>C\u1ed9ng \u0111\u1ed3ng tr\u1ebb, n\u0103ng \u0111\u1ed9ng v\u00e0 ph\u00e1t tri\u1ec3n nhanh ch\u00f3ng<\/li>\n\n\n\n<li><strong>Objective-C: <\/strong>C\u1ed9ng \u0111\u1ed3ng l\u00e2u \u0111\u1eddi v\u00e0 gi\u00e0u kinh nghi\u1ec7m<\/li>\n<\/ul>\n\n\n\n<p>T\u1eeb khi \u0111\u01b0\u1ee3c Apple ra m\u1eaft n\u0103m 2014, <strong>Swift<\/strong> \u0111\u00e3 nhanh ch\u00f3ng thu h\u00fat m\u1ed9t c\u1ed9ng \u0111\u1ed3ng \u0111\u00f4ng \u0111\u1ea3o c\u00e1c l\u1eadp tr\u00ecnh vi\u00ean tr\u00ean to\u00e0n th\u1ebf gi\u1edbi. L\u1ee3i th\u1ebf c\u1ee7a Swift l\u00e0 c\u1ed9ng \u0111\u1ed3ng \u0111ang ph\u00e1t tri\u1ec3n m\u1ea1nh m\u1ebd, r\u1ea5t t\u00edch c\u1ef1c chia s\u1ebb best practices, gi\u1ea3i ph\u00e1p t\u1ed1i \u01b0u v\u00e0 c\u1eadp nh\u1eadt theo xu h\u01b0\u1edbng m\u1edbi nh\u1ea5t (SwiftUI, Combine, async\/await&#8230;).<\/p>\n\n\n\n<p>Trong khi \u0111\u00f3, <strong>Objective-C<\/strong> &#8211; v\u1edbi vai tr\u00f2 l\u00e0 ng\u00f4n ng\u1eef ch\u1ee7 \u0111\u1ea1o c\u1ee7a iOS trong nhi\u1ec1u n\u0103m &#8211; s\u1edf h\u1eefu m\u1ed9t c\u1ed9ng \u0111\u1ed3ng gi\u00e0u kinh nghi\u1ec7m v\u00e0 kho t\u00e0i li\u1ec7u \u0111\u1ed3 s\u1ed9. D\u00f9 kh\u00f4ng c\u00f2n l\u00e0 \u01b0u ti\u00ean c\u1ee7a Apple n\u00ean kh\u00f4ng c\u1eadp nh\u1eadt s\u00f4i n\u1ed5i nh\u01b0 Swift, c\u1ed9ng \u0111\u1ed3ng Objective-C v\u1eabn l\u00e0 n\u01a1i \u0111\u00e1ng h\u1ecdc h\u1ecfi, nh\u1ea5t l\u00e0 v\u1edbi nh\u1eefng l\u1eadp tr\u00ecnh vi\u00ean mu\u1ed1n n\u1eafm v\u1eefng &#8220;g\u1ed1c r\u1ec5&#8221; c\u1ee7a h\u1ec7 sinh th\u00e1i Apple, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1c c\u00f4ng ngh\u1ec7 c\u1ed1t l\u00f5i c\u1ee7a iOS, c\u00e1ch b\u1ed9 runtime v\u1eadn h\u00e0nh v\u00e0 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a con tr\u1ecf trong l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng ki\u1ec3u C.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-swift-vs-objective-c-nen-h\u1ecdc-ngon-ng\u1eef-nao\"><span class=\"ez-toc-section\" id=\"Swift_vs_Objective-C_Nen_hoc_ngon_ngu_nao\"><\/span><strong>Swift vs Objective-C: N\u00ean h\u1ecdc ng\u00f4n ng\u1eef n\u00e0o?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-khi-nao-nen-h\u1ecdc-swift\"><strong>Khi n\u00e0o n\u00ean h\u1ecdc Swift?<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Khi b\u1eaft \u0111\u1ea7u m\u1ed9t d\u1ef1 \u00e1n m\u1edbi<\/strong><\/li>\n<\/ul>\n\n\n\n<p>N\u1ebfu \u0111ang chu\u1ea9n b\u1ecb <a href=\"https:\/\/itviec.com\/blog\/hoc-lap-trinh-ios\/\" target=\"_blank\" rel=\"noreferrer noopener\">h\u1ecdc l\u1eadp tr\u00ecnh iOS<\/a> ho\u1eb7c b\u1eaft \u0111\u1ea7u ph\u00e1t tri\u1ec3n m\u1ed9t \u1ee9ng d\u1ee5ng m\u1edbi, Swift l\u00e0 l\u1ef1a ch\u1ecdn t\u1ed1t nh\u1ea5t. Ng\u00f4n ng\u1eef n\u00e0y \u0111\u01b0\u1ee3c Apple \u01b0u ti\u00ean ph\u00e1t tri\u1ec3n n\u00ean c\u00fa ph\u00e1p r\u00f5 r\u00e0ng, hi\u1ec7n \u0111\u1ea1i v\u00e0 hi\u1ec7u n\u0103ng t\u1ed1i \u01b0u r\u1ea5t ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c ti\u00eau chu\u1ea9n ph\u00e1t tri\u1ec3n \u1ee9ng d\u1ee5ng ng\u00e0y nay.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Khi mu\u1ed1n ph\u00e1t tri\u1ec3n nhanh v\u00e0 linh ho\u1ea1t<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Swift r\u1ea5t l\u00fd t\u01b0\u1edfng cho startup, team nh\u1ecf ho\u1eb7c c\u00e1c d\u1ef1 \u00e1n c\u1ea7n tri\u1ec3n khai nhanh. B\u1edfi n\u00f3 c\u00f3 c\u00fa ph\u00e1p ng\u1eafn g\u1ecdn, d\u1ec5 hi\u1ec3u n\u00ean c\u00f3 th\u1ec3 code, th\u1eed nghi\u1ec7m \u00fd t\u01b0\u1edfng m\u1edbi v\u00e0 l\u1eb7p l\u1ea1i nhanh ch\u00f3ng trong giai \u0111o\u1ea1n prototyping.&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Khi mu\u1ed1n t\u1eadn d\u1ee5ng c\u1ea3 h\u1ec7 sinh th\u00e1i iOS c\u0169 v\u00e0 m\u1edbi<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Swift c\u00f3 th\u1ec3 t\u00edch h\u1ee3p t\u1ed1t v\u1edbi Objective-C n\u00ean l\u1eadp tr\u00ecnh vi\u00ean c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng Swift trong c\u00e1c d\u1ef1 \u00e1n c\u00f3 s\u1eb5n vi\u1ebft b\u1eb1ng Objective-C. Ng\u01b0\u1ee3c l\u1ea1i, l\u1eadp tr\u00ecnh vi\u00ean c\u0169ng d\u1ec5 d\u00e0ng chuy\u1ec3n d\u1ea7n t\u1eeb Objective-C sang Swift m\u00e0 kh\u00f4ng c\u1ea7n vi\u1ebft l\u1ea1i to\u00e0n b\u1ed9 codebase.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Khi mu\u1ed1n h\u1ecdc m\u1ed9t ng\u00f4n ng\u1eef \u0111\u01b0\u1ee3c c\u1ed9ng \u0111\u1ed3ng h\u1ed7 tr\u1ee3 m\u1ea1nh m\u1ebd<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Swift c\u00f3 m\u1ed9t c\u1ed9ng \u0111\u1ed3ng ph\u00e1t tri\u1ec3n l\u1edbn, t\u00edch c\u1ef1c v\u00e0 c\u1edfi m\u1edf. Nh\u1edd \u0111\u00f3, l\u1eadp tr\u00ecnh vi\u00ean c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng t\u00ecm th\u1ea5y t\u00e0i li\u1ec7u h\u1ecdc t\u1eadp mi\u1ec5n ph\u00ed, th\u01b0 vi\u1ec7n m\u00e3 ngu\u1ed3n m\u1edf, c\u00e1c gi\u1ea3i \u0111\u00e1p nhanh ch\u00f3ng tr\u00ean di\u1ec5n \u0111\u00e0n nh\u01b0 StackOverflow, Reddit,&#8230;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-khi-nao-nen-h\u1ecdc-objective-c\"><strong>Khi n\u00e0o n\u00ean h\u1ecdc Objective-C?<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Khi l\u00e0m vi\u1ec7c v\u1edbi d\u1ef1 \u00e1n legacy<\/strong><\/li>\n<\/ul>\n\n\n\n<p>N\u1ebfu tham gia v\u00e0o m\u1ed9t d\u1ef1 \u00e1n c\u00f3 ph\u1ea7n l\u1edbn m\u00e3 ngu\u1ed3n vi\u1ebft b\u1eb1ng Objective-C, vi\u1ec7c h\u1ecdc v\u00e0 duy tr\u00ec ng\u00f4n ng\u1eef n\u00e0y l\u00e0 c\u1ea7n thi\u1ebft v\u00ec n\u00f3 gi\u00fap l\u1eadp tr\u00ecnh vi\u00ean \u0111\u1ea3m b\u1ea3o t\u01b0\u01a1ng th\u00edch, t\u1eadn d\u1ee5ng l\u1ea1i code hi\u1ec7n c\u00f3 v\u00e0 tr\u00e1nh m\u1ea5t th\u1eddi gian vi\u1ebft l\u1ea1i to\u00e0n b\u1ed9 b\u1eb1ng Swift.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Khi team \u0111\u00e3 quen v\u1edbi Objective-C<\/strong><\/li>\n<\/ul>\n\n\n\n<p>N\u1ebfu nh\u00f3m l\u1eadp tr\u00ecnh vi\u00ean \u0111\u00e3 c\u00f3 nhi\u1ec1u n\u0103m kinh nghi\u1ec7m v\u1edbi Objective-C, n\u00ean ti\u1ebfp t\u1ee5c s\u1eed d\u1ee5ng ng\u00f4n ng\u1eef n\u00e0y \u0111\u1ec3 t\u0103ng hi\u1ec7u qu\u1ea3 l\u00e0m vi\u1ec7c, t\u1eadn d\u1ee5ng n\u0103ng l\u1ef1c s\u1eb5n c\u00f3, c\u0169ng nh\u01b0 gi\u1ea3m chi ph\u00ed h\u1ecdc l\u1ea1i t\u1eeb \u0111\u1ea7u ho\u1eb7c t\u00e1i c\u1ea5u tr\u00fac h\u1ec7 th\u1ed1ng. Tuy nhi\u00ean, d\u00f9 team \u0111\u00e3 quen nh\u01b0ng vi\u1ec7c c\u00e2n nh\u1eafc s\u1eed d\u1ee5ng Swift cho c\u00e1c module m\u1edbi ho\u1eb7c d\u1ef1 \u00e1n m\u1edbi v\u1eabn l\u00e0 m\u1ed9t chi\u1ebfn l\u01b0\u1ee3c t\u1ed1t cho t\u01b0\u01a1ng lai.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Khi c\u1ea7n d\u00f9ng th\u01b0 vi\u1ec7n ho\u1eb7c framework ch\u1ec9 c\u00f3 trong Objective-C<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Objective-C c\u00f3 h\u1ec7 sinh th\u00e1i th\u01b0 vi\u1ec7n l\u00e2u \u0111\u1eddi v\u00e0 \u1ed5n \u0111\u1ecbnh, m\u1ed9t s\u1ed1 trong \u0111\u00f3 kh\u00f4ng c\u00f3 b\u1ea3n t\u01b0\u01a1ng \u0111\u01b0\u01a1ng b\u1eb1ng Swift ho\u1eb7c ch\u01b0a t\u1ed1i \u01b0u khi t\u00edch h\u1ee3p v\u1edbi Swift. Do \u0111\u00f3, khi l\u00e0m vi\u1ec7c v\u1edbi nh\u1eefng d\u1ef1 \u00e1n ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c th\u01b0 vi\u1ec7n \u0111\u1eb7c th\u00f9 n\u00e0y, l\u1eadp tr\u00ecnh vi\u00ean v\u1eabn c\u1ea7n bi\u1ebft Objective-C.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Khi d\u1ef1 \u00e1n y\u00eau c\u1ea7u ki\u1ec3m so\u00e1t c\u1ea5p th\u1ea5p (low-level)<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Objective-C cho ph\u00e9p l\u1eadp tr\u00ecnh vi\u00ean truy c\u1eadp tr\u1ef1c ti\u1ebfp v\u00e0o API h\u1ec7 th\u1ed1ng c\u1ea5p th\u1ea5p v\u00e0 ki\u1ec3m so\u00e1t chi ti\u1ebft c\u00e1ch \u1ee9ng d\u1ee5ng t\u01b0\u01a1ng t\u00e1c v\u1edbi h\u1ec7 \u0111i\u1ec1u h\u00e0nh. Bi\u1ebft Objective-C s\u1ebd mang l\u1ea1i l\u1ee3i th\u1ebf trong c\u00e1c d\u1ef1 \u00e1n c\u1ea7n can thi\u1ec7p s\u00e2u nh\u01b0 tr\u00ecnh \u0111i\u1ec1u khi\u1ec3n thi\u1ebft b\u1ecb, x\u1eed l\u00fd b\u1ed9 nh\u1edb ho\u1eb7c t\u1ed1i \u01b0u hi\u1ec7u su\u1ea5t \u1edf m\u1ee9c h\u1ec7 th\u1ed1ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-c\u01a1-h\u1ed9i-vi\u1ec7c-lam-c\u1ee7a-swift-vs-objective-c\"><span class=\"ez-toc-section\" id=\"Co_hoi_viec_lam_cua_Swift_vs_Objective-C\"><\/span><strong>C\u01a1 h\u1ed9i vi\u1ec7c l\u00e0m c\u1ee7a Swift vs Objective-C<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u0110\u1ec3 gi\u00fap b\u1ea1n c\u00f3 c\u00e1i nh\u00ecn r\u00f5 h\u01a1n v\u1ec1 vi\u1ec7c l\u1ef1a ch\u1ecdn Swift hay Objective-C \u0111\u1ec3 b\u1eaft \u0111\u1ea7u, h\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u g\u00f3c nh\u00ecn t\u1eeb th\u1ecb tr\u01b0\u1eddng vi\u1ec7c l\u00e0m theo <a href=\"https:\/\/itviec.com\/bao-cao\/luong-it-va-thi-truong-tuyen-dung-it-vietnam\" target=\"_blank\" rel=\"noreferrer noopener\">B\u00e1o c\u00e1o L\u01b0\u01a1ng &amp; Th\u1ecb tr\u01b0\u1eddng tuy\u1ec3n d\u1ee5ng IT t\u1ea1i Vi\u1ec7t Nam 2024 &#8211; 2025<\/a> t\u1eeb ITviec tr\u00ean 3 kh\u00eda c\u1ea1nh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Nhu c\u1ea7u tuy\u1ec3n d\u1ee5ng<\/li>\n\n\n\n<li>Xu h\u01b0\u1edbng h\u1ecdc t\u1eadp v\u00e0 c\u1ed9ng \u0111\u1ed3ng<\/li>\n\n\n\n<li>M\u1ee9c l\u01b0\u01a1ng\u00a0<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-v\u1ec1-nhu-c\u1ea7u-tuy\u1ec3n-d\u1ee5ng-swift-v\u01b0\u1ee3t-tr\u1ed9i-v\u1ec1-c\u01a1-h\u1ed9i-ngh\u1ec1-nghi\u1ec7p\"><strong>V\u1ec1 nhu c\u1ea7u tuy\u1ec3n d\u1ee5ng: Swift v\u01b0\u1ee3t tr\u1ed9i v\u1ec1 c\u01a1 h\u1ed9i ngh\u1ec1 nghi\u1ec7p<\/strong><\/h3>\n\n\n\n<p>V\u1ec1 c\u01a1 h\u1ed9i vi\u1ec7c l\u00e0m, Swift \u0111ang chi\u1ebfm \u01b0u th\u1ebf. Trong n\u1eeda \u0111\u1ea7u n\u0103m 2025, Swift n\u1eb1m trong Top 15 ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh c\u00f3 nhu c\u1ea7u tuy\u1ec3n d\u1ee5ng cao, v\u1edbi t\u1ef7 l\u1ec7 7.3%, trong khi Objective-C ch\u1ec9 \u0111\u1ea1t 2.4%.<\/p>\n\n\n\n<p>\u0110\u00e1ng ch\u00fa \u00fd, trong nh\u00f3m l\u1eadp tr\u00ecnh vi\u00ean di \u0111\u1ed9ng, ch\u1ec9 0.7% s\u1eed d\u1ee5ng Objective-C l\u00e0m ng\u00f4n ng\u1eef ch\u00ednh &#8211; cho th\u1ea5y m\u1ee9c \u0111\u1ed9 ph\u1ed5 bi\u1ebfn c\u1ee7a n\u00f3 \u0111\u00e3 gi\u1ea3m m\u1ea1nh. Ng\u01b0\u1ee3c l\u1ea1i, Swift \u0111\u01b0\u1ee3c 22.9% l\u1eadp tr\u00ecnh vi\u00ean s\u1eed d\u1ee5ng l\u00e0m ng\u00f4n ng\u1eef ch\u00ednh, thu\u1ed9c top 5 ng\u00f4n ng\u1eef ph\u1ed5 bi\u1ebfn c\u1ee7a l\u1eadp tr\u00ecnh vi\u00ean di \u0111\u1ed9ng (27.2%).<\/p>\n\n\n\n<p>Swift l\u00e0 ng\u00f4n ng\u1eef \u0111\u01b0\u1ee3c c\u00e1c c\u00f4ng ty \u01b0u ti\u00ean khi x\u00e2y d\u1ef1ng app m\u1edbi, c\u00f2n Objective-C ch\u1ee7 y\u1ebfu duy tr\u00ec \u1edf c\u00e1c d\u1ef1 \u00e1n c\u0169 ho\u1eb7c h\u1ec7 th\u1ed1ng nh\u00fang (Embedded, 8%).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-v\u1ec1-xu-h\u01b0\u1edbng-h\u1ecdc-t\u1eadp-va-c\u1ed9ng-d\u1ed3ng-swift-d\u01b0\u1ee3c-yeu-thich-h\u01a1n\"><strong>V\u1ec1 xu h\u01b0\u1edbng h\u1ecdc t\u1eadp v\u00e0 c\u1ed9ng \u0111\u1ed3ng: Swift \u0111\u01b0\u1ee3c y\u00eau th\u00edch h\u01a1n<\/strong><\/h3>\n\n\n\n<p>Swift \u0111\u1ee9ng trong top 10 ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh \u0111\u01b0\u1ee3c mong mu\u1ed1n h\u1ecdc nh\u1ea5t (6.3%). \u0110\u1eb7c bi\u1ec7t, c\u00f3 \u0111\u1ebfn 26.1% l\u1eadp tr\u00ecnh vi\u00ean Kotlin mu\u1ed1n \u0111\u01b0\u1ee3c h\u1ecdc th\u00eam v\u1ec1 Swift. T\u1ef7 l\u1ec7 n\u00e0y cao h\u01a1n c\u1ea3 Python, cho th\u1ea5y s\u1ee9c h\u00fat m\u1ea1nh m\u1ebd c\u1ee7a Swift trong c\u1ed9ng \u0111\u1ed3ng l\u1eadp tr\u00ecnh vi\u00ean di \u0111\u1ed9ng hi\u1ec7n \u0111\u1ea1i.<\/p>\n\n\n\n<p>Swift c\u0169ng \u0111\u01b0\u1ee3c c\u00e1c nh\u00f3m qu\u1ea3n l\u00fd k\u1ef9 thu\u1eadt \u0111\u00e1nh gi\u00e1 cao v\u1ec1 t\u00ednh hi\u1ec7n \u0111\u1ea1i, d\u1ec5 \u0111\u1ecdc v\u00e0 hi\u1ec7u qu\u1ea3 ph\u00e1t tri\u1ec3n. C\u1ee5 th\u1ec3, Swift n\u1eb1m trong top 5 ng\u00f4n ng\u1eef m\u00e0 Project Leader\/Project Manager mu\u1ed1n h\u1ecdc (12.6%). \u0110\u1ed3ng th\u1eddi, Swift c\u0169ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nh\u00f3m Product Owner\/Manager (3.9%) v\u00e0 CTO\/CIO\/VPoE (4.8%).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-v\u1ec1-m\u1ee9c-l\u01b0\u01a1ng-objective-c-cao-h\u01a1n-nh\u01b0ng-khong-danh-cho-s\u1ed1-dong\"><strong>V\u1ec1 m\u1ee9c l\u01b0\u01a1ng: Objective-C cao h\u01a1n nh\u01b0ng kh\u00f4ng d\u00e0nh cho s\u1ed1 \u0111\u00f4ng<\/strong><\/h3>\n\n\n\n<p>M\u1ee9c l\u01b0\u01a1ng trung b\u00ecnh c\u1ee7a l\u1eadp tr\u00ecnh vi\u00ean Swift tr\u00ean 8 n\u0103m kinh nghi\u1ec7m \u0111\u1ea1t m\u1ee9c 54.350.000 VND\/th\u00e1ng.&nbsp;<\/p>\n\n\n\n<p>Trong khi \u0111\u00f3, m\u1ee9c l\u01b0\u01a1ng trung v\u1ecb c\u1ee7a l\u1eadp tr\u00ecnh vi\u00ean Objective-C v\u1edbi s\u1ed1 n\u0103m kinh nghi\u1ec7m t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u1ebfn <strong>100.000.000 VND\/th\u00e1ng<\/strong>, cao g\u1ea7n g\u1ea5p \u0111\u00f4i so v\u1edbi Swift. Tuy nhi\u00ean, con s\u1ed1 n\u00e0y ch\u1ee7 y\u1ebfu d\u00e0nh cho nh\u00f3m chuy\u00ean gia l\u00e0m vi\u1ec7c v\u1edbi h\u1ec7 th\u1ed1ng legacy, \u0111\u00f2i h\u1ecfi k\u1ef9 n\u0103ng s\u00e2u, kinh nghi\u1ec7m th\u1ef1c chi\u1ebfn v\u00e0 kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec code ph\u1ee9c t\u1ea1p.<\/p>\n\n\n\n<p><strong>T\u1eeb 3 ti\u00eau ch\u00ed tr\u00ean, c\u00f3 th\u1ec3 th\u1ea5y, v\u1edbi m\u1ed9t l\u1eadp tr\u00ecnh vi\u00ean m\u1edbi, Swift s\u1ebd l\u00e0 l\u1ef1a ch\u1ecdn th\u1ef1c t\u1ebf v\u00e0 d\u1ec5 ti\u1ebfp c\u1eadn h\u01a1n.&nbsp;<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-cac-cau-h\u1ecfi-th\u01b0\u1eddng-g\u1eb7p-v\u1ec1-swift-vs-objective-c\"><span class=\"ez-toc-section\" id=\"Cac_cau_hoi_thuong_gap_ve_Swift_vs_Objective-C\"><\/span><strong>C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 Swift vs Objective-C<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-swift-co-thay-th\u1ebf-hoan-toan-objective-c-khong\"><strong>Swift c\u00f3 thay th\u1ebf ho\u00e0n to\u00e0n Objective-C kh\u00f4ng?<\/strong><\/h3>\n\n\n\n<p>M\u1eb7c d\u00f9 Swift \u0111\u00e3 tr\u1edf th\u00e0nh ng\u00f4n ng\u1eef \u0111\u01b0\u1ee3c Apple \u01b0u ti\u00ean cho ph\u00e1t tri\u1ec3n \u1ee9ng d\u1ee5ng tr\u00ean iOS v\u00e0 macOS, Objective-C v\u1eabn ch\u01b0a b\u1ecb thay th\u1ebf ho\u00e0n to\u00e0n v\u00e0 v\u1eabn gi\u1eef vai tr\u00f2 quan tr\u1ecdng trong h\u1ec7 sinh th\u00e1i Apple.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-swift-co-nhanh-h\u01a1n-objective-c-khong\"><strong>Swift c\u00f3 nhanh h\u01a1n Objective-C kh\u00f4ng?<\/strong><\/h3>\n\n\n\n<p>Swift \u0111\u01b0\u1ee3c Apple thi\u1ebft k\u1ebf \u0111\u1ec3 v\u01b0\u1ee3t tr\u1ed9i v\u1ec1 hi\u1ec7u su\u1ea5t, v\u1edbi c\u00e1c \u01b0u \u0111i\u1ec3m nh\u01b0 tr\u00ecnh bi\u00ean d\u1ecbch hi\u1ec7n \u0111\u1ea1i v\u00e0 \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u cao (LLVM), h\u1ec7 th\u1ed1ng ki\u1ec3u t\u0129nh (static typing) gi\u00fap ki\u1ec3m tra v\u00e0 t\u1ed1i \u01b0u m\u00e3 ngay t\u1eeb l\u00fac bi\u00ean d\u1ecbch, c\u00fa ph\u00e1p g\u1ecdn g\u00e0ng gi\u00fap gi\u1ea3m l\u01b0\u1ee3ng m\u00e3 l\u1eb7p (boilerplate), d\u1ec5 b\u1ea3o tr\u00ec.<\/p>\n\n\n\n<p><a href=\"https:\/\/developer.apple.com\/videos\/play\/wwdc2024\/10217\" target=\"_blank\" rel=\"noreferrer noopener\">Theo Apple<\/a>, Swift c\u00f3 th\u1ec3 ch\u1ea1y nhanh h\u01a1n t\u1edbi 2,5 l\u1ea7n so v\u1edbi Objective-C trong m\u1ed9t s\u1ed1 t\u00e1c v\u1ee5 v\u00e0 vi\u1ebft \u00edt h\u01a1n 60% s\u1ed1 d\u00f2ng m\u00e3 \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00f9ng ch\u1ee9c n\u0103ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-objective-c-co-con-d\u01b0\u1ee3c-apple-c\u1eadp-nh\u1eadt-khong\"><strong>Objective-C c\u00f3 c\u00f2n \u0111\u01b0\u1ee3c Apple c\u1eadp nh\u1eadt kh\u00f4ng?<\/strong><\/h3>\n\n\n\n<p>Apple v\u1eabn ch\u01b0a \u201ckhai t\u1eed\u201d Objective-C n\u00ean ng\u00f4n ng\u1eef n\u00e0y v\u1eabn c\u00f3 s\u1ef1 h\u1ed7 tr\u1ee3 tr\u00ean t\u1ea5t c\u1ea3 n\u1ec1n t\u1ea3ng c\u1ee7a Apple v\u00e0 ph\u1ea7n l\u1edbn c\u00e1c framework h\u1ec7 \u0111i\u1ec1u h\u00e0nh v\u00e0 \u1ee9ng d\u1ee5ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-t\u1ed5ng-k\u1ebft\"><span class=\"ez-toc-section\" id=\"Tong_ket\"><\/span><strong>T\u1ed5ng k\u1ebft<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Vi\u1ec7c l\u1ef1a ch\u1ecdn b\u1eaft \u0111\u1ea7u b\u1edfi Swift hay Objective-C kh\u00f4ng ph\u1ea3i l\u00e0 ch\u1ecdn b\u00ean n\u00e0o t\u1ed1t h\u01a1n, m\u00e0 l\u00e0 ch\u1ecdn c\u00f4ng c\u1ee5 ph\u00f9 h\u1ee3p v\u1edbi m\u1ee5c ti\u00eau, b\u1ed1i c\u1ea3nh d\u1ef1 \u00e1n v\u00e0 \u0111\u1ecbnh h\u01b0\u1edbng s\u1ef1 nghi\u1ec7p c\u1ee7a b\u1ea1n. Trong khi Swift \u0111ang l\u00e0 xu h\u01b0\u1edbng ch\u1ee7 \u0111\u1ea1o trong ph\u00e1t tri\u1ec3n \u1ee9ng d\u1ee5ng iOS hi\u1ec7n \u0111\u1ea1i, v\u1edbi c\u00fa ph\u00e1p r\u00f5 r\u00e0ng, hi\u1ec7u n\u0103ng t\u1ed1i \u01b0u v\u00e0 c\u1ed9ng \u0111\u1ed3ng ng\u00e0y c\u00e0ng l\u1edbn m\u1ea1nh, th\u00ec Objective-C v\u1eabn gi\u1eef vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c duy tr\u00ec v\u00e0 ph\u00e1t tri\u1ec3n c\u00e1c h\u1ec7 th\u1ed1ng l\u00e2u \u0111\u1eddi, n\u01a1i c\u1ea7n s\u1ef1 \u1ed5n \u0111\u1ecbnh v\u00e0 hi\u1ec3u bi\u1ebft chuy\u00ean s\u00e2u.<\/p>\n\n\n\n<p>Hy v\u1ecdng b\u00e0i vi\u1ebft n\u00e0y \u0111\u00e3 gi\u00fap b\u1ea1n nh\u00ecn nh\u1eadn r\u00f5 h\u01a1n s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa hai ng\u00f4n ng\u1eef, t\u1eeb \u0111\u00f3 \u0111\u01b0a ra l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p nh\u1ea5t cho h\u00e0nh tr\u00ecnh l\u1eadp tr\u00ecnh c\u1ee7a ri\u00eang m\u00ecnh.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>M\u1eb7c d\u00f9 c\u00e1c \u1ee9ng d\u1ee5ng m\u1edbi tr\u00ean Apple hi\u1ec7n nay \u0111\u00e3 d\u1ea7n chuy\u1ec3n sang Swift, nh\u01b0ng kh\u00f4ng c\u00f3 ngh\u0129a Objective-C b\u1ecb \u201cx\u00f3a s\u1ed5\u201d. Nhi\u1ec1u c\u00f4ng ty v\u1eabn \u0111ang duy tr\u00ec c\u01a1 s\u1edf m\u00e3 ngu\u1ed3n (codebase) b\u1eb1ng ng\u00f4n ng\u1eef n\u00e0y. N\u1ebfu b\u1ea1n \u0111ang ph\u00e2n v\u00e2n l\u1ef1a ch\u1ecdn Swift vs Objective-C \u0111\u1ec3 b\u1eaft \u0111\u1ea7u, b\u00e0i vi\u1ebft n\u00e0y [&hellip;]<\/p>\n","protected":false},"author":213,"featured_media":88875,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_gspb_post_css":"","footnotes":""},"categories":[109],"tags":[],"class_list":["post-88870","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chuyen-mon-it"],"blocksy_meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.8 (Yoast SEO v27.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Swift vs Objective-C: N\u00ean h\u1ecdc ng\u00f4n ng\u1eef n\u00e0o khi l\u1eadp tr\u00ecnh iOS? - ITviec Blog<\/title>\n<meta name=\"description\" content=\"Swift vs Objective-C c\u00f3 g\u00ec kh\u00e1c bi\u1ec7t? 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