将UIView子类作为子视图添加到另一个视图时，如何获得通知？

Question

I need some kind of hook or template method to override which gets called when a view is added as subview to another view, but couldn't find it in the documentation. It must be something that gets called automatically by UIKit. The reason is that my view must start some animations as soon as there is a superview, but stop animating as soon as there is no superview anymore.

I can't override -setSuperview: as Xcode is not indicating that such class exists - and I can't call super.

Answer 1

You want to override - (void)didMoveToSuperview .

didMoveToSuperview

Tells the view that its superview changed.

The default implementation of this method does nothing. Subclasses can override it to perform additional actions whenever the superview changes.