问题
I've seen it on a previous app (forgetting the app name), where you could lock the current orientation of the screen.
Is there an easy way for this to be done, for example, simply using a button.
回答1:
Just add an ivar to your app delegate that can be set by pressing the locking button. Then in all of your view controllers you can just check the ivar in the app delegate and respond to the
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
message according to your orientation ivar
来源：https://stackoverflow.com/questions/600284/iphone-sdk-locking-the-orientation