从UIToolbar内部展开UIView？

Question

我有一个UeIView子类作为UIToolbar's按钮项之一。当用户点击它时，我希望它扩展出UIToolbar并向用户显示一些选项。问题是，UIToolbar不允许UIView在toolbar's框架之外呈现其subviews。我已将ClipToBounds设置为“无”，因此这不是问题。
关于如何处理这种情况的任何建议？

Answer 1

采取一个UIView在viewDidLoad:方法类似波纹管该组帧后的名称viewOption ..

viewOption.frame = CGRectMake(0, yourToolBar.frame.origin.y, viewOption.frame.size.height, viewOption.frame.size.height); /// define height and width which you want here 

然后在按钮事件编写代码，你的动画视图显示

-(IBAction)yourToolBarButton_Clicked:(id)sender 
{ 
    [UIView beginAnimations:nil context:NULL]; 
    [UIView setAnimationDuration:0.3]; 
    viewOption.frame = CGRectMake(0, 100, viewOption.frame.size.height, viewOption.frame.size.height);/// here set y as you want to display in view 
    [UIView commitAnimations]; 
}