如何以编程方式触发uibarbuttonitem click事件

Question

我创造了一个 UIActionSheet

UIActionSheet * action = [[UIActionSheet alloc]initWithTitle:@""
                                                              delegate:self
                                                     cancelButtonTitle: @"cancel"
                                                destructiveButtonTitle: @"OK"
                                                     otherButtonTitles: nil];
          [action showInView:self.view];
          [action release];

在取消按钮的事件中,UIActionSheet我想要触发一个事件UIBarButtonItem,这在我看来.

我的问题是如何在UIActionSheet委托方法中触发按钮事件(不触摸按钮)

Answer 1

另一种方法是避免警告如下:

[[UIApplication sharedApplication] sendAction:barButtonItem.action
                                           to:barButtonItem.target
                                         from:nil
                                     forEvent:nil];

Answer 2

不知道当前的条形按钮项目操作,您可以这样调用它:

[barButtonItem.target performSelector:barButtonItem.action]

然而,这将带来"未知选择器"编译器警告,但这可能会解决.

Answer 3

@ ton1n8o的解决方案对我有用.这是swift中的实现:

UIApplication.sharedApplication().sendAction(barButtonItem.action, to: barButtonItem.target, from: nil, forEvent: nil)