我是iosdevelopement的新手。我有一个主viewController有导航项，而我点击导航项popoverviewcontroller看起来很好，gettigexactcontentSizeForViewInPopover(320,845)，问题是当我点击popoverviewcontroller内的按钮时必须更改popoverContentsize。UIBarButtonItem*btn=(UIBarButtonItem*)sender;Agamam*agamamView=[[Agamamalloc]initWithNibName:@"Agamam"bundle:nil]