Re:Apple’s Use of Swift in iOS 13
by regera on Thursday September 26, 2019 @03:26PM
(#21084530)
Pure Swift for the new apps. We freak out when we see @ObjC or NSObject usage in our codebase. On a long enough timescale when Apple converts away from using Objective-C under the covers, our code will not need any modification.
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> We freak out when we see @ObjC or NSObject usage in our codebase.
…how are you interacting with UIKit?!
You rarely have to add @objc annotations or use NSObject directly. You only need it for target/action, KVO, etc.
I rarely see that annotation or class name in my codebases too.
UIButton only? Maybe binding UITextField events?
Buttons, selector-based Notifications (though the block version is finally good, so we mostly just use that now), & gesture recognizers look like our biggest users of @objc. Basically all to support target/action.
A quick search through one of my apps shows that about 4% of functions are marked as @objc (and we're not using the old compatibility mode where more methods were implicitly @objc either).