what is the suggested approach when I want to add a functionality to UIView so all views inside my app get those? As a matter of fact I need to add some stored properties too so an Extension is not possible. Since I need to deal with Textfields, ImageViews, Views (and who knows what else will come) I dont want to subclass every each of the too add that functionality, so the goal would be to make a subclass of UIView and all my controls (if its possible) get that functionality out of the box.what is the suggested approach when I want to a
阅读背景：
Subclass / Extend UIView所有其他视图（UIImageView，UITextField ...）在创建时继承
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