I kept imagining my project as a 500 mile hike. The original poster compared his project to walking across the Sahara. But that's finally done and now I'm running and testing my 98% Swift app (I have a few small third-party utilities that I left alone for now). so when everything was converted and I was able to try building again, I had 8000 compiler errors to deal with. Not far into that, Xcode's real-time error checking (the red and yellow icons) gave up and left me with no help from the compiler. This finally felt like too much time to spend on a temporary setup, and I decided just to push toward a complete conversion without further attention to interoperability. This meant I'd have to convert all the subclasses of a superclass first, then convert the superclass, then go back and make adjustments to all the subclasses, and repeat that cycle as I work up the tree. The file can't be manually edited and sometimes took several clean/build cycles to get it to update.Ī Swift class can inherit from an Obj-C class, but an Obj-C class can't inherit from a Swift class. Xcode automatically generates a bridging header to expose Objc-C classes to Swift, but it makes assumptions about naming conventions that can create mismatches. I found myself doing a lot of temporary coding and documenting what could change once Obj-C was gone. Other types like enums have limited support in Obj-C - for example, Swift enums can't be used as a function parameter type - so I was limited in what new Swift features I could use. Even Objc-C int and Swift Int require casting. Some types like Array and NSMutableArray aren't automatically interchangable, so I had to insert a lot of extra type casting. And after converting about 30 classes, I found myself spending most of my time tweaking code for interoperability between Objective-C and Swift. I don't want the mental load of maintaining a hybrid of two different programming languages long-term. I have a project of similar size to the original poster (250 classes, 7 MB of source code). Here's a different perspective from the other answers. Step 10: You can set a shortcut (Key Binding) for any command via Xcode -> Preferences -> Key Bindings. Step 9: You can also use the Right-Click menu to convert code from most macOS text editor apps: Step 8: The new Finder extension allows you to convert files, folders and even ZIP archives with your projects using the Right-Click menu: Step 7: Run (or restart) Xcode and check the Editor -> Swiftify menu. Step 6: If there’s nothing in the Editor menu, open System Preferences -> Extensions and put a checkmark next to “Swiftify for Xcode”. Please, Sign In or Sign Up Free to get your own API key. Step 5: Run “Swiftify for Xcode” from your Applications folder and enter the following API key: Under the section labeled "Allow applications downloaded from," select "Mac App Store and identified developers". Step 4: If the app is blocked from running, go to the Apple menu > System Preferences. Step 3: Download and install Swiftify for Xcode. Step 2: Sign or Sign Up to site to download the app. Step 1: Make sure you have latest version of Xcode (Recommended Xcode 11 & newer). You can use "Swift + Objective-C" as of now to make your app running smoothly and also giving updates regularly rather than waiting for the months to convert it completely.You may end-up having clean code under proper structure.You may find some unusual code or libraries lying around.
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