{"id":88542,"date":"2025-07-01T18:01:42","date_gmt":"2025-07-01T11:01:42","guid":{"rendered":"https:\/\/itviec.com\/blog\/?p=88542"},"modified":"2025-07-01T21:21:45","modified_gmt":"2025-07-01T14:21:45","slug":"objective-c-la-gi","status":"publish","type":"post","link":"https:\/\/itviec.com\/blog\/objective-c-la-gi\/","title":{"rendered":"Objective-C l\u00e0 g\u00ec? C\u00f3 c\u00f2n ph\u00f9 h\u1ee3p \u0111\u1ec3 h\u1ecdc trong n\u0103m 2025?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 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\/objective-c-la-gi\/#Objective-C_la_gi_Thuong_duoc_dung_trong_nhung_truong_hop_nao\" >Objective-C l\u00e0 g\u00ec? Th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p n\u00e0o?<\/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\/objective-c-la-gi\/#Uu_diem_va_nhuoc_diem_cua_Objective-C\" >\u01afu \u0111i\u1ec3m v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a Objective-C<\/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\/objective-c-la-gi\/#Objective-C_vs_Swift_So_sanh_hai_the_he_ngon_ngu_iOS\" >Objective-C vs Swift: So s\u00e1nh hai th\u1ebf h\u1ec7 ng\u00f4n ng\u1eef iOS<\/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\/objective-c-la-gi\/#Goc_nhin_tu_gioi_lap_trinh_Nen_hoc_Objective-C_hay_khong\" >G\u00f3c nh\u00ecn t\u1eeb gi\u1edbi l\u1eadp tr\u00ecnh: N\u00ean h\u1ecdc Objective-C hay kh\u00f4ng?<\/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\/objective-c-la-gi\/#Tai_nguyen_hoc_Objective-C_cho_nguoi_moi_bat_dau\" >T\u00e0i nguy\u00ean h\u1ecdc Objective-C cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u<\/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\/objective-c-la-gi\/#Cac_cau_hoi_thuong_gap_ve_Objective-C\" >C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 Objective-C<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/itviec.com\/blog\/objective-c-la-gi\/#Tong_ket\" >T\u1ed5ng k\u1ebft<\/a><\/li><\/ul><\/nav><\/div>\n\n<p><strong><em>N\u1ebfu b\u1ea1n t\u1eebng t\u00ecm hi\u1ec3u v\u1ec1 l\u1eadp tr\u00ecnh iOS nh\u1eefng n\u0103m tr\u01b0\u1edbc, ch\u1eafc h\u1eb3n ng\u00f4n ng\u1eef Objective-C kh\u00f4ng c\u00f2n xa l\u1ea1. M\u1eb7c d\u00f9 hi\u1ec7n nay, Swift v\u00e0 SwiftUI \u0111ang ng\u00e0y c\u00e0ng ph\u1ed5 bi\u1ebfn nh\u01b0ng Objective-C v\u1eabn \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng. V\u1eady vai tr\u00f2 hi\u1ec7n t\u1ea1i c\u1ee7a Objective-C trong l\u1eadp tr\u00ecnh iOS l\u00e0 g\u00ec v\u00e0 c\u00f3 th\u1eadt l\u00e0 ng\u00f4n ng\u1eef n\u00e0y \u0111ang ng\u00e0y c\u00e0ng \u201cmai m\u1ed9t\u201d?<\/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>Objective-C l\u00e0 g\u00ec?<\/li>\n\n\n\n<li>Objective-C th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p n\u00e0o?<\/li>\n\n\n\n<li>\u01afu \u0111i\u1ec3m v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a Objective-C<\/li>\n\n\n\n<li>S\u1ef1 kh\u00e1c nhau gi\u1eefa Objective-C v\u00e0 Swift<\/li>\n\n\n\n<li>G\u00f3c nh\u00ecn t\u1eeb gi\u1edbi l\u1eadp tr\u00ecnh: C\u00f3 n\u00ean h\u1ecdc Objective-C kh\u00f4ng?<\/li>\n\n\n\n<li>T\u00e0i nguy\u00ean h\u1ecdc l\u1eadp tr\u00ecnh Objective-C cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-objective-c-la-gi-th\u01b0\u1eddng-d\u01b0\u1ee3c-dung-trong-nh\u1eefng-tr\u01b0\u1eddng-h\u1ee3p-nao\"><span class=\"ez-toc-section\" id=\"Objective-C_la_gi_Thuong_duoc_dung_trong_nhung_truong_hop_nao\"><\/span><strong>Objective-C l\u00e0 g\u00ec? Th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p n\u00e0o?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Objective-C l\u00e0 m\u1ed9t ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng, \u0111a m\u1ee5c \u0111\u00edch, \u0111\u01b0\u1ee3c Apple l\u1ef1a ch\u1ecdn l\u00e0m n\u1ec1n t\u1ea3ng ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m cho c\u00e1c h\u1ec7 \u0111i\u1ec1u h\u00e0nh nh\u01b0 macOS, iOS, watchOS v\u00e0 tvOS. Objective-C l\u00e0 m\u1ed9t t\u1eadp h\u1ee3p cha (superset) c\u1ee7a ng\u00f4n ng\u1eef C. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 b\u1ea1n c\u00f3 th\u1ec3 vi\u1ebft m\u00e3 C thu\u1ea7n t\u00fay tr\u1ef1c ti\u1ebfp trong c\u00e1c t\u1ec7p Objective-C v\u00e0 bi\u00ean d\u1ecbch ch\u00fang.&nbsp;<\/p>\n\n\n\n<p>Kh\u00e1c v\u1edbi c\u00e1c ng\u00f4n ng\u1eef h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c nh\u01b0 <a href=\"https:\/\/itviec.com\/blog\/java-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">Java<\/a> hay <a href=\"https:\/\/itviec.com\/blog\/cpp-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">C++<\/a> s\u1eed d\u1ee5ng c\u01a1 ch\u1ebf g\u1ecdi ph\u01b0\u01a1ng th\u1ee9c (method calling), Objective-C s\u1eed d\u1ee5ng c\u01a1 ch\u1ebf g\u1eedi th\u00f4ng \u0111i\u1ec7p (message passing).&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>V\u1edbi method calling, tr\u00ecnh bi\u00ean d\u1ecbch s\u1ebd ki\u1ec3m tra ki\u1ec3u \u0111\u1ed1i t\u01b0\u1ee3ng t\u1ea1i th\u1eddi \u0111i\u1ec3m bi\u00ean d\u1ecbch (compile time) \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c ph\u01b0\u01a1ng th\u1ee9c n\u00e0o s\u1ebd \u0111\u01b0\u1ee3c g\u1ecdi. \u0110i\u1ec1u n\u00e0y th\u1ec3 hi\u1ec7n t\u00ednh t\u0129nh (static binding).&nbsp;<\/li>\n\n\n\n<li>Trong khi \u0111\u00f3, v\u1edbi Objective-C, thay v\u00ec x\u00e1c \u0111\u1ecbnh ph\u01b0\u01a1ng th\u1ee9c t\u1ea1i th\u1eddi \u0111i\u1ec3m bi\u00ean d\u1ecbch, ch\u01b0\u01a1ng tr\u00ecnh s\u1ebd g\u1eedi m\u1ed9t th\u00f4ng \u0111i\u1ec7p \u0111\u1ebfn \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng s\u1ebd x\u1eed l\u00fd t\u1ea1i th\u1eddi \u0111i\u1ec3m ch\u1ea1y (runtime). \u0110\u00e2y l\u00e0 c\u01a1 ch\u1ebf r\u00e0ng bu\u1ed9c \u0111\u1ed9ng (dynamic binding), cho ph\u00e9p \u0111\u1ed1i t\u01b0\u1ee3ng linh ho\u1ea1t x\u1eed l\u00fd ho\u1eb7c b\u1ecf qua m\u1ed9t th\u00f4ng \u0111i\u1ec7p, th\u1eadm ch\u00ed chuy\u1ec3n ti\u1ebfp n\u00f3 \u0111\u1ebfn \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c n\u1ebfu c\u1ea7n. Tuy nhi\u00ean, c\u01a1 ch\u1ebf n\u00e0y \u0111\u00f2i h\u1ecfi c\u1ea7n c\u1ea9n th\u1eadn h\u01a1n v\u00ec l\u1ed7i c\u00f3 th\u1ec3 ch\u1ec9 xu\u1ea5t hi\u1ec7n khi ch\u1ea1y ch\u01b0\u01a1ng tr\u00ecnh..<\/li>\n<\/ul>\n\n\n\n<p>Objective-C th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u1eadp tr\u00ecnh vi\u00ean s\u1eed d\u1ee5ng trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><a href=\"https:\/\/itviec.com\/blog\/lap-trinh-ios\/\" target=\"_blank\" rel=\"noreferrer noopener\">Ph\u00e1t tri\u1ec3n \u1ee9ng d\u1ee5ng iOS<\/a> v\u00e0 macOS: <\/strong>R\u1ea5t nhi\u1ec1u \u1ee9ng d\u1ee5ng tr\u00ean iPhone, iPad, Macbook \u0111\u01b0\u1ee3c vi\u1ebft b\u1eb1ng Objective-C, \u0111\u1eb7c bi\u1ec7t l\u00e0 tr\u01b0\u1edbc khi Swift ra \u0111\u1eddi.<\/li>\n\n\n\n<li><strong>B\u1ea3o tr\u00ec h\u1ec7 th\u1ed1ng c\u00f3 m\u00e3 ngu\u1ed3n c\u0169 (legacy codebase)<\/strong>: M\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng l\u1edbn hi\u1ec7n nay nh\u01b0 Facebook, Airbnb, Pinterest v\u1eabn gi\u1eef l\u1ea1i codebase vi\u1ebft b\u1eb1ng Objective-C.<\/li>\n\n\n\n<li><strong>L\u00e0m vi\u1ec7c v\u1edbi c\u00e1c framework Cocoa (macOS) v\u00e0 Cocoa Touch (iOS)<\/strong>: \u0110\u00e2y l\u00e0 nh\u1eefng framework ch\u00ednh th\u1ee9c c\u1ee7a Apple, \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p ch\u1eb7t ch\u1ebd v\u1edbi Objective-C.<\/li>\n\n\n\n<li><strong>Tham gia d\u1ef1 \u00e1n m\u00e3 ngu\u1ed3n m\u1edf ho\u1eb7c th\u01b0 vi\u1ec7n chuy\u00ean s\u00e2u:<\/strong> Nhi\u1ec1u th\u01b0 vi\u1ec7n iOS\/macOS m\u00e3 ngu\u1ed3n m\u1edf \u0111\u01b0\u1ee3c vi\u1ebft b\u1eb1ng Objective-C nh\u01b0 AFNetworking, Mantle,&#8230;<\/li>\n\n\n\n<li><strong>L\u00e0m vi\u1ec7c v\u1edbi c\u00e1c d\u1ef1 \u00e1n c\u00f3 s\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa Objective-C v\u00e0 Swift: <\/strong>Swift c\u00f3 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c t\u1ed1t v\u1edbi Objective-C (interop), cho ph\u00e9p s\u1eed d\u1ee5ng l\u1eabn nhau gi\u1eefa hai ng\u00f4n ng\u1eef trong c\u00f9ng m\u1ed9t d\u1ef1 \u00e1n.<\/li>\n\n\n\n<li><strong>Nghi\u00ean c\u1ee9u v\u00e0 hi\u1ec3u s\u00e2u v\u1ec1 c\u00e1c c\u00f4ng ngh\u1ec7 c\u1ed1t l\u00f5i c\u1ee7a Apple<\/strong>: C\u00e1c framework n\u1ec1n t\u1ea3ng nh\u01b0 Foundation, UIKit, AppKit, Core Data \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng b\u1eb1ng Objective-C. N\u00ean d\u00f9 b\u1ea1n d\u00f9ng Swift th\u00ec ph\u1ea7n l\u1edbn API v\u1eabn gi\u1eef nguy\u00ean c\u1ea5u tr\u00fac v\u00e0 t\u01b0 duy t\u1eeb Objective-C.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-\u01b0u-di\u1ec3m-va-nh\u01b0\u1ee3c-di\u1ec3m-c\u1ee7a-objective-c\"><span class=\"ez-toc-section\" id=\"Uu_diem_va_nhuoc_diem_cua_Objective-C\"><\/span><strong>\u01afu \u0111i\u1ec3m v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a Objective-C<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-\u01b0u-di\u1ec3m-c\u1ee7a-objective-c\"><strong>\u01afu \u0111i\u1ec3m c\u1ee7a Objective-C<\/strong><\/h3>\n\n\n\n<p>Kh\u00f4ng ph\u1ea3i ng\u1eabu nhi\u00ean m\u00e0 Objective-C \u0111\u01b0\u1ee3c x\u1ebfp v\u00e0o nh\u00f3m ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh \u201cl\u00e0m m\u01b0a l\u00e0m gi\u00f3\u201d m\u1ed9t th\u1eddi. Nh\u1eefng \u01b0u \u0111i\u1ec3m c\u1ee7a Objective-C d\u01b0\u1edbi \u0111\u00e2y s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u l\u00fd do.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Objective-C l\u00e0 ng\u00f4n ng\u1eef c\u00f3 t\u00ednh \u0111\u1ed9ng (dynamic runtime): <\/strong>Nh\u1edd c\u01a1 ch\u1ebf g\u1eedi th\u00f4ng \u0111i\u1ec7p, nhi\u1ec1u h\u00e0nh vi trong ch\u01b0\u01a1ng tr\u00ecnh \u0111\u01b0\u1ee3c quy\u1ebft \u0111\u1ecbnh t\u1ea1i th\u1eddi \u0111i\u1ec3m ch\u1ea1y thay v\u00ec khi bi\u00ean d\u1ecbch n\u00ean l\u1eadp tr\u00ecnh vi\u00ean c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng nhi\u1ec1u k\u1ef9 thu\u1eadt l\u1eadp tr\u00ecnh linh ho\u1ea1t. Ngo\u00e0i ra, Objective-C c\u00f2n cho ph\u00e9p m\u1edf r\u1ed9ng class ho\u1eb7c th\u00eam method ngay c\u1ea3 khi ch\u01b0\u01a1ng tr\u00ecnh \u0111ang ch\u1ea1y, mang l\u1ea1i kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u00e0 t\u00f9y bi\u1ebfn cao h\u01a1n so v\u1edbi c\u00e1c ng\u00f4n ng\u1eef OOP t\u0129nh kh\u00e1c nh\u01b0 Java hay C++.<\/li>\n\n\n\n<li><strong>T\u00ednh m\u1edf r\u1ed9ng cao: <\/strong>Objective-C h\u1ed7 tr\u1ee3 dynamic typing v\u00e0 dynamic binding, gi\u00fap m\u1edf r\u1ed9ng ch\u01b0\u01a1ng tr\u00ecnh d\u1ec5 d\u00e0ng m\u00e0 kh\u00f4ng c\u1ea7n thay \u0111\u1ed5i qu\u00e1 nhi\u1ec1u \u1edf ph\u1ea7n code g\u1ed1c.<\/li>\n\n\n\n<li><strong>H\u1ed7 tr\u1ee3 c\u00fa ph\u00e1p OOP: <\/strong>Objective-C cho ph\u00e9p s\u1eed d\u1ee5ng \u0111\u1ea7y \u0111\u1ee7 c\u00e1c t\u00ednh n\u0103ng c\u1ee7a l\u1eadp tr\u00ecnh OOP gi\u00fap vi\u1ebft code linh ho\u1ea1t v\u00e0 c\u00f3 c\u1ea5u tr\u00fac r\u00f5 r\u00e0ng.<\/li>\n\n\n\n<li><strong>T\u00edch h\u1ee3p t\u1ed1t v\u1edbi C v\u00e0 C++: <\/strong>Objective-C l\u00e0 m\u1ed9t superset c\u1ee7a C n\u00ean n\u00f3 cho ph\u00e9p l\u1eadp tr\u00ecnh vi\u00ean g\u1ecdi v\u00e0 t\u00e1i s\u1eed d\u1ee5ng code C\/C++ d\u1ec5 d\u00e0ng, \u0111i\u1ec1u m\u00e0 nhi\u1ec1u ng\u00f4n ng\u1eef hi\u1ec7n \u0111\u1ea1i kh\u00f4ng th\u1ec3 l\u00e0m \u0111\u01b0\u1ee3c.<\/li>\n\n\n\n<li><strong>\u0110\u01b0\u1ee3c d\u00f9ng r\u1ed9ng r\u00e3i trong h\u1ec7 sinh th\u00e1i Apple: <\/strong>Nhi\u1ec1u API v\u00e0 framework n\u1ec1n t\u1ea3ng c\u1ee7a Apple (nh\u01b0 Foundation, UIKit, Cocoa) c\u00f3 g\u1ed1c t\u1eeb Objective-C. B\u1eb1ng c\u00e1ch hi\u1ec3u ng\u00f4n ng\u1eef n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 khai th\u00e1c s\u00e2u h\u01a1n s\u1ee9c m\u1ea1nh c\u1ee7a ch\u00fang, ngay c\u1ea3 khi l\u00e0m vi\u1ec7c v\u1edbi Swift.<\/li>\n\n\n\n<li><strong>C\u1ed9ng \u0111\u1ed3ng v\u00e0 t\u00e0i li\u1ec7u phong ph\u00fa: <\/strong>Cho \u0111\u1ebfn hi\u1ec7n nay Objective-C v\u1eabn c\u00f3 m\u1ed9t c\u1ed9ng \u0111\u1ed3ng \u0111\u00f4ng \u0111\u1ea3o v\u00e0 l\u01b0\u1ee3ng t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt l\u1edbn nh\u01b0 <a href=\"https:\/\/developer.apple.com\/forums\/tags\/objective-c\" target=\"_blank\" rel=\"noreferrer noopener\">Apple Developer Forums<\/a>, <a href=\"https:\/\/www.reddit.com\/r\/iOSProgramming\/\" target=\"_blank\" rel=\"noreferrer noopener\">Reddit-r\/iOSProgramming<\/a>, <a href=\"https:\/\/stackoverflow.com\/questions\/tagged\/objective-c\" target=\"_blank\" rel=\"noreferrer noopener\">Stack Overflow &#8211; Objective-C Tag<\/a>.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-nh\u01b0\u1ee3c-di\u1ec3m-c\u1ee7a-objective-c\"><strong>Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a Objective-C<\/strong><\/h3>\n\n\n\n<p>V\u1eady t\u1ea1i sao gi\u1edd \u0111\u00e2y Objective-C kh\u00f4ng c\u00f2n l\u00e0 ng\u00f4n ng\u1eef \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng?<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>C\u00fa ph\u00e1p ph\u1ee9c t\u1ea1p, kh\u00f3 ti\u1ebfp c\u1eadn v\u1edbi ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u:<\/strong> C\u00e1ch g\u1ecdi ph\u01b0\u01a1ng th\u1ee9c ki\u1ec3u g\u1eedi th\u00f4ng \u0111i\u1ec7p c\u00f3 th\u1ec3 g\u00e2y kh\u00f3 kh\u0103n cho ng\u01b0\u1eddi m\u1edbi.<\/li>\n\n\n\n<li><strong>Qu\u1ea3n l\u00fd b\u1ed9 nh\u1edb th\u1ee7 c\u00f4ng theo c\u01a1 ch\u1ebf Manual Reference Counting (MRC): <\/strong>Tr\u01b0\u1edbc khi c\u00f3 ARC (Automatic Reference Counting), l\u1eadp tr\u00ecnh vi\u00ean ph\u1ea3i t\u1ef1 g\u1ecdi c\u00e1c l\u1ec7nh nh\u01b0 retain, release, autorelease \u0111\u1ec3 ki\u1ec3m so\u00e1t v\u00f2ng \u0111\u1eddi c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0m r\u00f2 r\u1ec9 b\u1ed9 nh\u1edb (memory leak) ho\u1eb7c gi\u1ea3i ph\u00f3ng nh\u1ea7m v\u00f9ng nh\u1edb (dangling pointer).<\/li>\n\n\n\n<li><strong>T\u00ednh an to\u00e0n th\u1ea5p h\u01a1n Swift: <\/strong>Objective-C thi\u1ebfu nhi\u1ec1u t\u00ednh n\u0103ng hi\u1ec7n \u0111\u1ea1i nh\u01b0 ki\u1ec3m tra ki\u1ec3u m\u1ea1nh, optional binding, type inference,&#8230; khi\u1ebfn code d\u1ec5 g\u1eb7p l\u1ed7i runtime h\u01a1n so v\u1edbi Swift.<\/li>\n\n\n\n<li><strong>Kh\u00f3 b\u1ea3o tr\u00ec trong c\u00e1c d\u1ef1 \u00e1n l\u1edbn v\u1ec1 l\u00e2u d\u00e0i: <\/strong>V\u1edbi nh\u1eefng d\u1ef1 \u00e1n l\u1edbn, vi\u1ec7c thi\u1ebfu t\u00ednh n\u0103ng hi\u1ec7n \u0111\u1ea1i, c\u00f9ng v\u1edbi c\u1ea5u tr\u00fac ch\u01b0a r\u00f5 r\u00e0ng d\u1ec5 khi\u1ebfn code tr\u1edf n\u00ean kh\u00f3 b\u1ea3o tr\u00ec.<\/li>\n\n\n\n<li><strong>Kh\u00f4ng ph\u1ea3i l\u00e0 ng\u00f4n ng\u1eef \u01b0u ti\u00ean hi\u1ec7n t\u1ea1i c\u1ee7a Apple:<\/strong> K\u1ec3 t\u1eeb khi Swift ra \u0111\u1eddi, Apple \u0111\u00e3 chuy\u1ec3n h\u01b0\u1edbng ho\u00e0n to\u00e0n sang ph\u00e1t tri\u1ec3n v\u00e0 t\u1ed1i \u01b0u cho Swift.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-objective-c-vs-swift-so-sanh-hai-th\u1ebf-h\u1ec7-ngon-ng\u1eef-ios\"><span class=\"ez-toc-section\" id=\"Objective-C_vs_Swift_So_sanh_hai_the_he_ngon_ngu_iOS\"><\/span><strong>Objective-C vs Swift: So s\u00e1nh hai th\u1ebf h\u1ec7 ng\u00f4n ng\u1eef iOS<\/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><strong>C\u00fa ph\u00e1p<\/strong><\/td><td>C\u00fa ph\u00e1p g\u1eedi th\u00f4ng \u0111i\u1ec7p ri\u00eang bi\u1ec7t d\u00e0i d\u00f2ng, kh\u00f3 ti\u1ebfp c\u1eadn<\/td><td>G\u1ecdn, d\u1ec5 \u0111\u1ecdc, hi\u1ec7n \u0111\u1ea1i<\/td><\/tr><tr><td><strong>Hi\u1ec7u n\u0103ng<\/strong><\/td><td>Ch\u1eadm h\u01a1n Swift do ph\u1ee5 thu\u1ed9c v\u00e0o runtime \u0111\u1ed9ng<\/td><td>T\u1ed1i \u01b0u cho t\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd<\/td><\/tr><tr><td><strong>Qu\u1ea3n l\u00fd b\u1ed9 nh\u1edb<\/strong><\/td><td>H\u1ed7 tr\u1ee3 ARC h\u1ea1n ch\u1ebf, nhi\u1ec1u khi ph\u1ea3i th\u1ef1c hi\u1ec7n b\u1eb1ng tay (retain\/release)<\/td><td>T\u1ef1 \u0111\u1ed9ng v\u1edbi ARC<\/td><\/tr><tr><td><strong>C\u00f4ng c\u1ee5 h\u1ed7 tr\u1ee3<\/strong><\/td><td>\u1ed4n \u0111\u1ecbnh nh\u01b0ng thi\u1ebfu t\u00ednh n\u0103ng hi\u1ec7n \u0111\u1ea1i nh\u01b0 type inference (suy lu\u1eadn ki\u1ec3u d\u1eef li\u1ec7u), optionals (bi\u1ebfn t\u00f9y ch\u1ecdn), generic (ki\u1ec3u t\u1ed5ng qu\u00e1t),&#8230;<\/td><td>\u0110a d\u1ea1ng, nh\u1ea5t l\u00e0 Xcode, Playground<\/td><\/tr><tr><td><strong>C\u1ed9ng \u0111\u1ed3ng<\/strong><\/td><td>\u0110\u00e3 c\u00f3 t\u1eeb l\u00e2u, t\u00e0i nguy\u00ean phong ph\u00fa<\/td><td>Ph\u00e1t tri\u1ec3n nhanh ch\u00f3ng<\/td><\/tr><tr><td><strong>Th\u1eddi gian th\u1ef1c thi<\/strong><\/td><td>Ch\u1eadm, do overhead t\u1eeb runtime<\/td><td>Nhanh h\u01a1n Objective-C<\/td><\/tr><tr><td><strong>\u0110\u1ed9 an to\u00e0n<\/strong><\/td><td>D\u1ec5 g\u1eb7p l\u1ed7i runtime<\/td><td>H\u1ec7 th\u1ed1ng ki\u1ec3u d\u1eef li\u1ec7u m\u1ea1nh, c\u00f3 optional<\/td><\/tr><tr><td><strong>\u0110\u1ed9 d\u1ec5 h\u1ecdc<\/strong><\/td><td>Kh\u00f3 h\u1ecdc h\u01a1n Swift do c\u00fa ph\u00e1p ph\u1ee9c t\u1ea1p<\/td><td>D\u1ec5 ti\u1ebfp c\u1eadn&nbsp;<\/td><\/tr><\/tbody><\/table><\/figure>\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\/swift-vs-objective-c\/\" target=\"_blank\" rel=\"noreferrer noopener\">Swift vs Objective-C: N\u00ean h\u1ecdc ng\u00f4n ng\u1eef n\u00e0o khi l\u1eadp tr\u00ecnh iOS?<\/a><\/strong><\/em><\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-goc-nhin-t\u1eeb-gi\u1edbi-l\u1eadp-trinh-nen-h\u1ecdc-objective-c-hay-khong\"><span class=\"ez-toc-section\" id=\"Goc_nhin_tu_gioi_lap_trinh_Nen_hoc_Objective-C_hay_khong\"><\/span><strong>G\u00f3c nh\u00ecn t\u1eeb gi\u1edbi l\u1eadp tr\u00ecnh: N\u00ean h\u1ecdc Objective-C hay kh\u00f4ng?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Tr\u00ean <a href=\"https:\/\/developer.apple.com\/forums\/thread\/60628\" target=\"_blank\" rel=\"noreferrer noopener\">di\u1ec5n \u0111\u00e0n Apple Developer<\/a>, nhi\u1ec1u l\u1eadp tr\u00ecnh vi\u00ean cho bi\u1ebft, h\u1ecd v\u1eabn c\u00f3 th\u1ec3 ph\u00e1t tri\u1ec3n \u1ee9ng d\u1ee5ng iOS ho\u00e0n to\u00e0n b\u1eb1ng Swift m\u00e0 kh\u00f4ng c\u1ea7n h\u1ecdc Objective-C. Tuy nhi\u00ean khi th\u1ef1c chi\u1ebfn, vi\u1ec7c hi\u1ec3u v\u00e0 x\u1eed l\u00fd \u0111\u01b0\u1ee3c m\u00e3 ngu\u1ed3n Objective-C s\u1ebd \u0111em l\u1ea1i l\u1ee3i th\u1ebf l\u1edbn, nh\u1ea5t l\u00e0 khi l\u00e0m vi\u1ec7c v\u1edbi c\u00e1c th\u01b0 vi\u1ec7n c\u0169, framework h\u1ec7 th\u1ed1ng ho\u1eb7c codebase doanh nghi\u1ec7p \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng t\u1eeb nhi\u1ec1u n\u0103m tr\u01b0\u1edbc.<\/p>\n\n\n\n<p><a href=\"https:\/\/itviec.com\/bao-cao\/luong-it-va-thi-truong-tuyen-dung-it-vietnam#get-the-report\" target=\"_blank\" rel=\"noreferrer noopener\">Theo b\u00e1o c\u00e1o 2024 &#8211; 2025 c\u1ee7a ITviec<\/a>, t\u1ea1i Vi\u1ec7t Nam ch\u1ec9 c\u00f2n kho\u1ea3ng 8% l\u1eadp tr\u00ecnh vi\u00ean c\u00f2n s\u1eed d\u1ee5ng Objective-C, th\u1ea5p h\u01a1n nhi\u1ec1u so v\u1edbi c\u00e1c ng\u00f4n ng\u1eef m\u1edbi nh\u01b0 <a href=\"https:\/\/itviec.com\/blog\/kotlin-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">Kotlin<\/a> hay Rust. \u0110\u00e2y kh\u00f4ng ph\u1ea3i s\u1ef1 bi\u1ebfn m\u1ea5t \u0111\u1ed9t ng\u1ed9t, m\u00e0 vi\u1ec7c c\u00e1c l\u1eadp tr\u00ecnh vi\u00ean tr\u1ebb \u00edt l\u1ef1a ch\u1ecdn Objective-C c\u0169ng l\u00e0 \u0111i\u1ec1u d\u1ec5 hi\u1ec3u:<\/p>\n\n\n\n<p>K\u1ec3 t\u1eeb khi \u0111\u01b0\u1ee3c Apple gi\u1edbi thi\u1ec7u v\u00e0o n\u0103m 2014, Swift \u0111\u00e3 nhanh ch\u00f3ng chi\u1ebfm \u01b0u th\u1ebf nh\u1edd c\u00fa ph\u00e1p ng\u1eafn g\u1ecdn, an to\u00e0n v\u00e0 d\u1ec5 h\u1ecdc. C\u00e1c t\u00e0i li\u1ec7u \u0111\u00e0o t\u1ea1o, kh\u00f3a h\u1ecdc v\u00ec th\u1ebf c\u0169ng d\u1ea7n t\u1eadp trung v\u00e0o Swift, khi\u1ebfn l\u1eadp tr\u00ecnh vi\u00ean tr\u1ebb \u00edt c\u00f3 c\u01a1 h\u1ed9i ti\u1ebfp c\u1eadn Objective-C ngay t\u1eeb \u0111\u1ea7u.&nbsp;<\/p>\n\n\n\n<p>Ngo\u00e0i ra, ph\u1ea7n l\u1edbn d\u1ef1 \u00e1n m\u1edbi hi\u1ec7n nay \u0111\u1ec1u l\u1ef1a ch\u1ecdn Swift l\u00e0m ng\u00f4n ng\u1eef ph\u00e1t tri\u1ec3n ch\u00ednh nh\u1edd kh\u1ea3 n\u0103ng tri\u1ec3n khai nhanh, d\u1ec5 b\u1ea3o tr\u00ec v\u00e0 c\u1ed9ng \u0111\u1ed3ng h\u1ed7 tr\u1ee3 m\u1ea1nh. \u0110i\u1ec1u n\u00e0y khi\u1ebfn nhu c\u1ea7u tuy\u1ec3n d\u1ee5ng l\u1eadp tr\u00ecnh vi\u00ean Objective-C d\u1ea7n b\u1ecb thu h\u1eb9p, ch\u1ec9 xu\u1ea5t hi\u1ec7n ch\u1ee7 y\u1ebfu \u1edf c\u00e1c c\u00f4ng ty \u0111ang duy tr\u00ec h\u1ec7 th\u1ed1ng l\u1edbn, v\u1eadn h\u00e0nh l\u00e2u n\u0103m.<\/p>\n\n\n\n<p>Tuy nhi\u00ean, c\u0169ng ch\u00ednh v\u00ec s\u1ef1 \u201ckhan hi\u1ebfm\u201d n\u00e0y m\u00e0 nh\u1eefng l\u1eadp tr\u00ecnh vi\u00ean c\u00f3 kinh nghi\u1ec7m th\u1ef1c chi\u1ebfn v\u1edbi Objective-C trong c\u00e1c h\u1ec7 th\u1ed1ng l\u1edbn, ph\u1ee9c t\u1ea1p l\u1ea1i \u0111\u01b0\u1ee3c s\u0103n \u0111\u00f3n \u1edf c\u00e1c v\u1ecb tr\u00ed c\u1ea5p trung v\u00e0 c\u1ea5p cao, \u0111\u1eb7c bi\u1ec7t t\u1ea1i c\u00e1c c\u00f4ng ty v\u1eabn duy tr\u00ec h\u1ea1 t\u1ea7ng c\u0169. H\u1ecd th\u01b0\u1eddng l\u00e0 nh\u1eefng ng\u01b0\u1eddi hi\u1ec3u s\u00e2u h\u1ec7 th\u1ed1ng, c\u00f3 kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec, t\u1ed1i \u01b0u v\u00e0 t\u00edch h\u1ee3p codebase c\u0169 m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 n\u00ean r\u1ea5t kh\u00f3 thay th\u1ebf, \u0111i k\u00e8m v\u1edbi m\u1ee9c l\u01b0\u01a1ng v\u00e0 \u0111\u00e3i ng\u1ed9 cao.<\/p>\n\n\n\n<p>C\u0169ng theo b\u00e1o c\u00e1o 2024 &#8211; 2025 c\u1ee7a ITviec, m\u1ee9c l\u01b0\u01a1ng trung v\u1ecb cho c\u00e1c v\u1ecb tr\u00ed y\u00eau c\u1ea7u k\u1ef9 n\u0103ng Objective-C dao \u0111\u1ed9ng t\u1eeb <strong>40 &#8211; 50 tri\u1ec7u\/th\u00e1ng<\/strong>, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi m\u1eb7t b\u1eb1ng l\u01b0\u01a1ng c\u1ee7a c\u00e1c ng\u00f4n ng\u1eef ph\u1ed5 bi\u1ebfn nh\u01b0 Java ho\u1eb7c C#.<\/p>\n\n\n\n<p><strong>V\u00ec v\u1eady, n\u1ebfu b\u1ea1n l\u00e0 ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u v\u1edbi l\u1eadp tr\u00ecnh iOS, Swift v\u1eabn l\u00e0 l\u1ef1a ch\u1ecdn n\u00ean \u01b0u ti\u00ean h\u00e0ng \u0111\u1ea7u.<\/strong> Sau \u0111\u00f3, khi mu\u1ed1n m\u1edf r\u1ed9ng c\u01a1 h\u1ed9i ngh\u1ec1 nghi\u1ec7p trong c\u00e1c d\u1ef1 \u00e1n mang t\u00ednh \u201cdi s\u1ea3n\u201d ho\u1eb7c t\u1ea1i c\u00e1c c\u00f4ng ty \u0111ang v\u1eadn h\u00e0nh h\u1ec7 th\u1ed1ng c\u0169, vi\u1ec7c t\u00ecm hi\u1ec3u th\u00eam v\u1ec1 Objective-C s\u1ebd l\u00e0 m\u1ed9t \u201ckho\u1ea3n \u0111\u1ea7u t\u01b0\u201d l\u00e2u d\u00e0i \u0111\u00e1ng c\u00e2n nh\u1eafc.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-tai-nguyen-h\u1ecdc-objective-c-cho-ng\u01b0\u1eddi-m\u1edbi-b\u1eaft-d\u1ea7u\"><span class=\"ez-toc-section\" id=\"Tai_nguyen_hoc_Objective-C_cho_nguoi_moi_bat_dau\"><\/span><strong>T\u00e0i nguy\u00ean h\u1ecdc Objective-C cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/developer.apple.com\/documentation\/objectivec\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>T\u00e0i li\u1ec7u ch\u00ednh th\u1ee9c c\u1ee7a Apple<\/strong><\/a><strong>: <\/strong>Trang developer.apple.com cung c\u1ea5p t\u00e0i li\u1ec7u chi ti\u1ebft v\u1ec1 Objective-C v\u00e0 c\u1ea3 c\u00e1ch l\u00e0m vi\u1ec7c v\u1edbi Cocoa\/Cocoa Touch, h\u01b0\u1edbng d\u1eabn t\u00edch h\u1ee3p v\u1edbi Swift. \u0110\u00e2y l\u00e0 ngu\u1ed3n h\u1ecdc c\u00f3 \u0111\u1ed9 tin c\u1eady cao v\u00e0 ph\u00f9 h\u1ee3p v\u1edbi c\u1ea3 ng\u01b0\u1eddi m\u1edbi l\u1eabn l\u1eadp tr\u00ecnh vi\u00ean l\u00e2u n\u0103m.<\/li>\n\n\n\n<li><a href=\"https:\/\/developer.apple.com\/library\/archive\/documentation\/Cocoa\/Conceptual\/ObjectiveC\/Introduction\/introObjectiveC.html\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>The Objective-C Programming Language Guide<\/strong><\/a><strong>: <\/strong>\u0110\u00e2y l\u00e0 m\u1ed9t t\u00e0i li\u1ec7u do ch\u00ednh Apple ph\u00e1t h\u00e0nh. M\u1eb7c d\u00f9 \u0111\u00e3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef (archived) v\u00e0 kh\u00f4ng c\u00f2n c\u1eadp nh\u1eadt, nh\u01b0ng \u0111\u00e2y v\u1eabn l\u00e0 ngu\u1ed3n h\u1ecdc n\u1ec1n t\u1ea3ng r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 hi\u1ec3u r\u00f5 t\u01b0 duy v\u00e0 c\u1ea5u tr\u00fac ng\u00f4n ng\u1eef.<\/li>\n\n\n\n<li><a href=\"http:\/\/raywenderlich.com\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Raywenderlich.com<\/strong><\/a><strong>: <\/strong>Website n\u00e0y chuy\u00ean v\u1ec1 l\u1eadp tr\u00ecnh iOS v\u1edbi h\u01b0\u1edbng d\u1eabn c\u1ee5 th\u1ec3, d\u1ec5 hi\u1ec3u.&nbsp;<\/li>\n\n\n\n<li><strong>S\u00e1ch h\u01b0\u1edbng d\u1eabn v\u1ec1 Objective-C: <\/strong>\u201c<a href=\"https:\/\/www.amazon.com\/Programming-Objective-C-6th-Developers-Library\/dp\/0321967607\" target=\"_blank\" rel=\"noreferrer noopener\">Programming in Objective-C<\/a>\u201d c\u1ee7a Stephen G. Kochan; \u201c<a href=\"https:\/\/www.amazon.com\/Objective-C-Absolute-Beginners-iPhone-Programming\/dp\/1430228326\" target=\"_blank\" rel=\"noreferrer noopener\">Objective-C for Absolute Beginners<\/a>\u201d,&#8230;<\/li>\n\n\n\n<li><strong>Kh\u00f3a h\u1ecdc video tr\u1ef1c tuy\u1ebfn: <\/strong>M\u1ed9t s\u1ed1 n\u1ec1n t\u1ea3ng nh\u01b0 <a href=\"https:\/\/www.udemy.com\/topic\/objective-c\/\" target=\"_blank\" rel=\"noreferrer noopener\">Udemy<\/a>, <a href=\"https:\/\/www.coursera.org\/courses\" target=\"_blank\" rel=\"noreferrer noopener\">Coursera<\/a> v\u1eabn cung c\u1ea5p kh\u00f3a h\u1ecdc c\u00f3 n\u1ed9i dung v\u1ec1 Objective-C, th\u01b0\u1eddng n\u1eb1m trong c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh h\u1ecdc t\u1ed5ng quan v\u1ec1 ph\u00e1t tri\u1ec3n \u1ee9ng d\u1ee5ng iOS.&nbsp;<\/li>\n<\/ul>\n\n\n\n<p><strong>L\u01b0u \u00fd:<\/strong> N\u1ebfu b\u1ea1n \u0111\u00e3 c\u00f3 n\u1ec1n t\u1ea3ng Swift, c\u00f3 th\u1ec3 b\u1eaft \u0111\u1ea7u b\u1eb1ng vi\u1ec7c \u0111\u1ecdc hi\u1ec3u code Objective-C v\u00e0 th\u1ef1c h\u00e0nh chuy\u1ec3n \u0111\u1ed5i qua l\u1ea1i gi\u1eefa hai ng\u00f4n ng\u1eef \u0111\u1ec3 n\u00e2ng cao k\u1ef9 n\u0103ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-cac-cau-h\u1ecfi-th\u01b0\u1eddng-g\u1eb7p-v\u1ec1-objective-c\"><span class=\"ez-toc-section\" id=\"Cac_cau_hoi_thuong_gap_ve_Objective-C\"><\/span><strong>C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 Objective-C<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-objective-c-co-con-d\u01b0\u1ee3c-apple-h\u1ed7-tr\u1ee3-khong\"><strong>Objective-C c\u00f3 c\u00f2n \u0111\u01b0\u1ee3c Apple h\u1ed7 tr\u1ee3 kh\u00f4ng?<\/strong><\/h3>\n\n\n\n<p>Cho \u0111\u1ebfn th\u1eddi \u0111i\u1ec3m hi\u1ec7n t\u1ea1i, Apple v\u1eabn ch\u01b0a c\u00f3 th\u00f4ng b\u00e1o n\u00e0o ch\u00ednh th\u1ee9c v\u1ec1 vi\u1ec7c ng\u1eebng h\u1ed7 tr\u1ee3 Objective-C. C\u00e1c t\u00e0i li\u1ec7u hay c\u00f4ng c\u1ee5 nh\u01b0 Xcode v\u00e0 c\u00e1c API h\u1ec7 th\u1ed1ng nh\u01b0 UIKit, Foundation v\u1eabn h\u1ed7 tr\u1ee3 Objective-C.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-co-th\u1ec3-h\u1ecdc-tr\u1ef1c-ti\u1ebfp-swift-ma-b\u1ecf-qua-objective-c-khong\"><strong>C\u00f3 th\u1ec3 h\u1ecdc tr\u1ef1c ti\u1ebfp Swift m\u00e0 b\u1ecf qua Objective-C kh\u00f4ng?<\/strong><\/h3>\n\n\n\n<p>B\u1ea1n ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 h\u1ecdc v\u00e0 l\u1eadp tr\u00ecnh iOS b\u1eb1ng Swift m\u00e0 kh\u00f4ng c\u1ea7n h\u1ecdc Objective-C. Swift v\u1ed1n l\u00e0 ng\u00f4n ng\u1eef hi\u1ec7n \u0111\u1ea1i, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ng\u01b0\u1eddi m\u1edbi d\u1ec5 ti\u1ebfp c\u1eadn. Ngo\u00e0i ra, c\u00e1c t\u00e0i li\u1ec7u hi\u1ec7n nay \u0111\u1ec1u t\u1eadp trung v\u00e0o Swift v\u00e0 Apple c\u0169ng \u01b0u ti\u00ean ng\u00f4n ng\u1eef n\u00e0y cho c\u00e1c d\u1ef1 \u00e1n m\u1edbi h\u01a1n. Tuy nhi\u00ean, vi\u1ec7c c\u00f3 ki\u1ebfn th\u1ee9c v\u1ec1 Objective-C s\u1ebd l\u00e0 m\u1ed9t l\u1ee3i th\u1ebf trong tr\u01b0\u1eddng h\u1ee3p b\u1ea1n l\u00e0m vi\u1ec7c v\u1edbi codebase c\u0169.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-lam-sao-d\u1ec3-chuy\u1ec3n-code-t\u1eeb-objective-c-sang-swift\"><strong>L\u00e0m sao \u0111\u1ec3 chuy\u1ec3n code t\u1eeb Objective-C sang Swift?<\/strong><\/h3>\n\n\n\n<p>Theo <a href=\"https:\/\/developer.apple.com\/documentation\/swift\/migrating-your-objective-c-code-to-swift\" target=\"_blank\" rel=\"noreferrer noopener\">h\u01b0\u1edbng d\u1eabn t\u1eeb t\u00e0i li\u1ec7u ch\u00ednh th\u1ee9c c\u1ee7a Apple<\/a>, b\u1ea1n c\u00f3 th\u1ec3 chuy\u1ec3n code t\u1eeb Objective-C sang Swift theo c\u00e1c b\u01b0\u1edbc sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>B\u01b0\u1edbc 1: <\/strong>Gi\u1eef l\u1ea1i code Objective-C hi\u1ec7n c\u00f3 v\u00e0 th\u00eam file Swift m\u1edbi v\u00e0o c\u00f9ng d\u1ef1 \u00e1n trong Xcode.<\/li>\n\n\n\n<li><strong>B\u01b0\u1edbc 2<\/strong>: T\u1ea1o Brindging Header \u0111\u1ec3 Swift c\u00f3 th\u1ec3 g\u1ecdi code Objective-C v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.<\/li>\n\n\n\n<li><strong>B\u01b0\u1edbc 3: <\/strong>Vi\u1ebft l\u1ea1i t\u1eebng ph\u1ea7n (module ho\u1eb7c class) b\u1eb1ng Swift, thay v\u00ec chuy\u1ec3n to\u00e0n b\u1ed9 c\u00f9ng l\u00fac.<\/li>\n\n\n\n<li><strong>B\u01b0\u1edbc 4: <\/strong>S\u1eed d\u1ee5ng l\u1ea1i c\u00e1c framework Objective-C hi\u1ec7n c\u00f3 th\u00f4ng qua interop m\u00e0 kh\u00f4ng c\u1ea7n vi\u1ebft l\u1ea1i n\u1ebfu kh\u00f4ng c\u1ea7n thi\u1ebft.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-co-th\u1ec3-dung-swift-va-objective-c-trong-cung-m\u1ed9t-d\u1ef1-an-khong\"><strong>C\u00f3 th\u1ec3 d\u00f9ng Swift v\u00e0 Objective-C trong c\u00f9ng m\u1ed9t d\u1ef1 \u00e1n kh\u00f4ng?<\/strong><\/h3>\n\n\n\n<p>B\u1ea1n ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c t\u1ec7p Objective-C v\u00e0 Swift trong c\u00f9ng m\u1ed9t d\u1ef1 \u00e1n, b\u1ea5t k\u1ec3 d\u1ef1 \u00e1n ban \u0111\u1ea7u s\u1eed d\u1ee5ng ng\u00f4n ng\u1eef n\u00e0o. Vi\u1ec7c k\u1ebft h\u1ee3p hai ng\u00f4n ng\u1eef n\u00e0y kh\u00f4ng l\u00e0m thay \u0111\u1ed5i c\u00e1ch x\u00e2y d\u1ef1ng \u1ee9ng d\u1ee5ng v\u00e0 b\u1ea1n c\u00f2n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng t\u1ea1o ra c\u00e1c module ho\u1eb7c t\u00ednh n\u0103ng m\u1edbi b\u1eb1ng Swift trong khi v\u1eabn gi\u1eef l\u1ea1i ph\u1ea7n code c\u0169 vi\u1ebft b\u1eb1ng Objective-C.<\/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>M\u1eb7c d\u00f9 kh\u00f4ng c\u00f2n ph\u1ed5 bi\u1ebfn nh\u01b0 tr\u01b0\u1edbc, Objective-C v\u1eabn \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c duy tr\u00ec v\u00e0 m\u1edf r\u1ed9ng c\u00e1c h\u1ec7 th\u1ed1ng c\u0169, \u0111\u1eb7c bi\u1ec7t trong c\u00e1c t\u1ed5 ch\u1ee9c l\u1edbn.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>N\u1ebfu b\u1ea1n t\u1eebng t\u00ecm hi\u1ec3u v\u1ec1 l\u1eadp tr\u00ecnh iOS nh\u1eefng n\u0103m tr\u01b0\u1edbc, ch\u1eafc h\u1eb3n ng\u00f4n ng\u1eef Objective-C kh\u00f4ng c\u00f2n xa l\u1ea1. M\u1eb7c d\u00f9 hi\u1ec7n nay, Swift v\u00e0 SwiftUI \u0111ang ng\u00e0y c\u00e0ng ph\u1ed5 bi\u1ebfn nh\u01b0ng Objective-C v\u1eabn \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng. V\u1eady vai tr\u00f2 hi\u1ec7n t\u1ea1i c\u1ee7a Objective-C trong l\u1eadp tr\u00ecnh iOS l\u00e0 g\u00ec v\u00e0 [&hellip;]<\/p>\n","protected":false},"author":213,"featured_media":88858,"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-88542","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 v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Objective-C l\u00e0 g\u00ec? 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