{"id":1145,"date":"2018-05-17T12:01:33","date_gmt":"2018-05-17T12:01:33","guid":{"rendered":"https:\/\/www.sysbunny.com\/blog\/?p=1145"},"modified":"2021-05-02T10:41:40","modified_gmt":"2021-05-02T05:11:40","slug":"how-to-switch-your-apps-from-objective-c-to-swift","status":"publish","type":"post","link":"https:\/\/www.sysbunny.com\/blog\/how-to-switch-your-apps-from-objective-c-to-swift\/","title":{"rendered":"How to Switch Your Apps from Objective-C to Swift"},"content":{"rendered":"<span data-preserver-spaces=\"true\">Many existing iOS applications need to change Swift code thanks to the myriads of benefits Swift brings with it. Many iOS developers wonder how to convert apps from Objective-C code to Swift, so this post gives you valuable tips and easy steps to go ahead in the conversion process.<\/span>\n<h3><span data-preserver-spaces=\"true\">Introduction:<\/span><\/h3>\n<span data-preserver-spaces=\"true\">When Apple Inc. has released the first iPhone SDK in 2007 and invited third-party developers to create iPhone apps, it has declared Objective-C as the official iOS programming language supporting X-code as a development tool &amp; IDE. After seven years, in 2014, again iOS platform has declared Swift as a next-generation programming language in addition to Objective-C.<\/span>\n\n<span data-preserver-spaces=\"true\">Swift comes with myriads of advantages over Objective-C and entirely befitting for current needs. Therefore, Apple has avoided upgrading Objective-C and created Swift from scratch. Thus,\u00a0<\/span><a class=\"editor-rtfLink\" href=\"https:\/\/www.sysbunny.com\/hire-ios-developer.php\" target=\"_blank\" rel=\"noopener noreferrer\"><strong><span data-preserver-spaces=\"true\">seasoned iOS developers<\/span><\/strong><\/a><span data-preserver-spaces=\"true\">\u00a0avoid converting Objective-C code into Swift code and write an app in the Swift code from scratch.<\/span>\n\n<span data-preserver-spaces=\"true\">However, some apps are of a big scale, and writing from scratch in Swift proves costly affairs. Hence, developers prefer to use converting tools in the X-code or third-party service providers and manage things tactfully.<\/span>\n\n<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1146\" src=\"https:\/\/www.sysbunny.com\/blog\/wp-content\/uploads\/2018\/05\/appy-birthday-to-youVirgo-the-Virgin.jpg\" alt=\"\" width=\"1024\" height=\"512\" srcset=\"https:\/\/www.sysbunny.com\/blog\/wp-content\/uploads\/2018\/05\/appy-birthday-to-youVirgo-the-Virgin.jpg 1024w, https:\/\/www.sysbunny.com\/blog\/wp-content\/uploads\/2018\/05\/appy-birthday-to-youVirgo-the-Virgin-300x150.jpg 300w, https:\/\/www.sysbunny.com\/blog\/wp-content\/uploads\/2018\/05\/appy-birthday-to-youVirgo-the-Virgin-768x384.jpg 768w, https:\/\/www.sysbunny.com\/blog\/wp-content\/uploads\/2018\/05\/appy-birthday-to-youVirgo-the-Virgin-594x297.jpg 594w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/>\n<h3>Objective-C to Swift Converter<\/h3>\nApple offers <a href=\"https:\/\/developer.apple.com\/library\/content\/releasenotes\/ObjectiveC\/ModernizationObjC\/AdoptingModernObjective-C\/AdoptingModernObjective-C.html\" rel=\"nofollow noopener\" target=\"_blank\">modern Objective-C converter<\/a> in X-code, which helps developers to do following important things during conversion.\n<ul>\n \t<li>Implementing Enum Macros<\/li>\n \t<li>Changing ID to InstanceType<\/li>\n \t<li>Assists in updating @proprty syntax<\/li>\n<\/ul>\nWe should keep one thing in mind that converter helps us only in detection and implementation of mechanics of potential changes. It will never represent the semantics of the code. It means <a href=\"https:\/\/www.sysbunny.com\/blog\/ios-developers-must-watch-out-for-these-latest-features-of-swift-5\/\">iOS developers<\/a> have to go manually for alterations and improve the quality of resulting Swift code.\n<table>\n<tbody>\n<tr>\n<td width=\"623\">To use converter in X-code Edit -&gt; Convert -&gt; To Modern Objective-C SyntaxOr\n\nEdit -&gt; Refactor -&gt; Change To Modern Objective-C Syntax\n\nTo convert a full Objective-C app to Swift, use <a href=\"http:\/\/swiftify.com\/\" rel=\"nofollow noopener\" target=\"_blank\">Swiftify<\/a>.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span data-preserver-spaces=\"true\">Tips While Using Objective-C to Swift Converter<\/span><\/h2>\n<span data-preserver-spaces=\"true\">Before giving you a step-by-step guide to convert the code, I would like to give you following tips.<\/span>\n<h4><span data-preserver-spaces=\"true\">Attend One Class at a Time<\/span><\/h4>\n<span data-preserver-spaces=\"true\">The program paradigms of both iOS languages are different and can create issues if we are going to use tools to convert code line-by-line. Therefore, it is advisable to covert one class at a time.<\/span>\n\n<span data-preserver-spaces=\"true\">Remember that, unlike Objective-C, Swift doesn\u2019t have subclasses. Therefore, you will end up with two different types of files in-app code document, (.h) type and (.m) type.<\/span>\n<ul>\n \t<li><span data-preserver-spaces=\"true\">(.h) type contains a @interface section<\/span><\/li>\n \t<li><span data-preserver-spaces=\"true\">(.m) type contains a @implementation section<\/span><\/li>\n<\/ul>\n<span data-preserver-spaces=\"true\">Since (.m) file imports (.h) file whenever the need arises, refer to a class and eliminate the creation of header file.<\/span>\n<h4><span data-preserver-spaces=\"true\">Creating a Bridging Header<\/span><\/h4>\n<span data-preserver-spaces=\"true\">Once you add an Objective-C file into Swift target or vice versa, you will have chances to develop a bridging header file. Thus, when you import the (.h) file into the bridging header, it becomes visible to Swift.<\/span>\n<h4><span data-preserver-spaces=\"true\">Accomplish Nil Check<\/span><\/h4>\n<span data-preserver-spaces=\"true\">You get a zero value in return wherever a message is sent to a nil object in Objective-C programming. If you want to avoid it, you must perform nil checks as per need.<\/span>\n<h4><span data-preserver-spaces=\"true\">Get Wrapped Value<\/span><\/h4>\n<span data-preserver-spaces=\"true\">You can substitute the Optional with String in the Swift because you can get syntactic sugar for starting types optional. When you use two methods, including Optional Chaining and Forced Wrapping, you receive wrapped value from the elective container in two conditions:<\/span>\n<ol>\n \t<li><span data-preserver-spaces=\"true\">If a conditional statement obtains a value when it exists<\/span><\/li>\n \t<li><span data-preserver-spaces=\"true\">If the conditional statement is not nil<\/span><\/li>\n<\/ol>\n<h4><span data-preserver-spaces=\"true\">Use Tuples<\/span><\/h4>\n<span data-preserver-spaces=\"true\">Besides Optionals, Apple has a new development language define as Tuples. Its aim is different grouping values into one compound value, a better tool to create a model at a place.<\/span>\n<h4><span data-preserver-spaces=\"true\">Conversion Process<\/span><\/h4>\n<span data-preserver-spaces=\"true\">Let\u2019s check it step-by-step.<\/span>\n<ol>\n \t<li><span data-preserver-spaces=\"true\">Select a pair of (.h) and (.m) files you want to convert<\/span><\/li>\n \t<li><span data-preserver-spaces=\"true\">Search #import \u201cMyViewController.h\u201d across the code document and remove it<\/span><\/li>\n \t<li><span data-preserver-spaces=\"true\">In all .m files, you need to replace #import \u201c[filename].h\u201d instances with #import \u201c[MyProject]-Swift.h\u201d<\/span><\/li>\n \t<li><span data-preserver-spaces=\"true\">In all the .h files, replace @class [filename] with #import \u201c[filename].h\u201d<\/span><\/li>\n \t<li><span data-preserver-spaces=\"true\">Now, transform Objective-C files to Swift using Swiftify Xcode Extension<\/span><\/li>\n \t<li><span data-preserver-spaces=\"true\">Replace (.h) and (.m) files with converted (.swift) files<\/span><\/li>\n \t<li><span data-preserver-spaces=\"true\">Now, it is time to fix the conversion error, and the Swiftify extension can help you in this regard<\/span><\/li>\n \t<li><span data-preserver-spaces=\"true\">Now, you can build and run the project smoothly<\/span><\/li>\n \t<li><span data-preserver-spaces=\"true\">If you have chosen to convert the entire project, you can transform AppDelegate class now<\/span><\/li>\n<\/ol>\n<h3><span data-preserver-spaces=\"true\">Conclusion:<\/span><\/h3>\n<span data-preserver-spaces=\"true\">After an overview of the entire conversion process, you may have decided that you should have an expert team of iOS developers who used to do the same and converted several projects successfully. In due course, a\u00a0<\/span><span data-preserver-spaces=\"true\">team of iOS app developers at <a href=\"https:\/\/www.sysbunny.com\/\">SysBunny<\/a><\/span><span data-preserver-spaces=\"true\">\u00a0may prove the right choice for you even you want to create your Objective-C app from scratch in Swift code.<\/span>\n<blockquote>Would you like to begin a thread of conversations with us?<\/blockquote>","protected":false},"excerpt":{"rendered":"Many existing iOS applications need to change Swift code thanks to the myriads of benefits Swift brings with it. Many iOS developers wonder how to convert apps from Objective-C code to Swift, so this post gives you valuable tips and easy steps to go ahead in the conversion process. Introduction: When Apple Inc. has released [&hellip;]","protected":false},"author":1,"featured_media":1167,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[138],"tags":[270,269,268,271],"class_list":["post-1145","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ios","tag-ios-app-developers","tag-ios-app-development-language","tag-ios-apps","tag-objective-c-to-swift","clearfix","post-index"],"acf":[],"jetpack_featured_media_url":"https:\/\/www.sysbunny.com\/blog\/wp-content\/uploads\/2018\/05\/Untitled-design.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.sysbunny.com\/blog\/wp-json\/wp\/v2\/posts\/1145","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sysbunny.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sysbunny.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sysbunny.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sysbunny.com\/blog\/wp-json\/wp\/v2\/comments?post=1145"}],"version-history":[{"count":21,"href":"https:\/\/www.sysbunny.com\/blog\/wp-json\/wp\/v2\/posts\/1145\/revisions"}],"predecessor-version":[{"id":3213,"href":"https:\/\/www.sysbunny.com\/blog\/wp-json\/wp\/v2\/posts\/1145\/revisions\/3213"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sysbunny.com\/blog\/wp-json\/wp\/v2\/media\/1167"}],"wp:attachment":[{"href":"https:\/\/www.sysbunny.com\/blog\/wp-json\/wp\/v2\/media?parent=1145"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sysbunny.com\/blog\/wp-json\/wp\/v2\/categories?post=1145"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sysbunny.com\/blog\/wp-json\/wp\/v2\/tags?post=1145"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}