iOS7でUIActionSheetを表示する

iOS7でUIActionSheetを表示しようとすると、従来のコードでは

'NSInvalidArgumentException', reason: 'Sheet can not be presented because the view is not in a window

とコンソールに表示されてアプリがクラッシュする。

修正前

UIActionSheet *actionSheet = [[[UIActionSheet alloc]
initWithTitle: @"Hoge"
delegate: self
cancelButtonTitle: @"Cancel", nil)
destructiveButtonTitle: nil
otherButtonTitles:
@"Done", nil]
autorelease];

CGRect frame = [[UIScreen mainScreen] applicationFrame];
UIView *actionSheetsubView = [[[UIView alloc] initWithFrame:CGRectMake(0,0,frame.size.width,frame.size.height)]autorelease];
[actionSheet showInView: actionSheetsubView];

修正後

UIActionSheet *actionSheet = [[[UIActionSheet alloc]
initWithTitle: @"Hoge"
delegate: self
cancelButtonTitle: @"Cancel", nil)
destructiveButtonTitle: nil
otherButtonTitles:
@"Done", nil]
autorelease];

[actionSheet showInView:[[[[UIApplication sharedApplication] keyWindow] subviews] lastObject]];

参考記事：
http://stackoverflow.com/questions/18932544/nsinvalidargumentexception-reason-sheet-can-not-be-presented-because-the-vi