iphone UIView - 在加载视图时收到通知？

Question

I have a subclass of UIView, I want to be notified as soon as the view is loaded on the screen. Is there some kind of delegate method for a UIView.

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NOTE: I am not using a UIViewController

Answer 1

There is no delegate method but you can override,

- (void)didAddSubview:(UIView *)subview{
}

Answer 2

如果您不使用OpenGL，可以使用- （void）drawRect：（CGRect）rect 。

Answer 3

Set the class which opens your view as the delegate of the view, then on viewDidLoad (which runs as soon as the view is opened, even if it's not by a viewController per se) notify the delegate. That should work, I believe.