取消UIAlertView的方法

Question

I was wandering if it was more correct to dismiss a UIAlertView using:

[alert removeFromSuperview];

Or using:

[alert dismissWithClickedButtonIndex: 0 animated: TRUE];

The first one seems to give problems...

Answer 1

Always use dismissWithClickedButtonIndex. Removing the view from the superview has undefined behaviour - we have no idea what the iOS internals are doing.

Answer 2

Alert是一个弹出视图，因此应始终使用[alert dismissWithClickedButtonIndex: 0 animated: YES];来将其关闭[alert dismissWithClickedButtonIndex: 0 animated: YES];