动作当我在iPhone中持有UIButton 2秒时触发 [英] Action Trigger when I hold UIButton for 2 second in iPhone

问题描述

我的应用程序中有一个 UIButton ，当我触摸 UIButton 时会触发一个动作。

I have a UIButton in my application and an action which is triggered when I TouchDown UIButton.

是否可以在iPhone上的 UIButton 上检测到触摸并保持？我希望当用户按住按钮2秒钟或更长时间时触发我的操作。

Is it possible to detect a Touch-and-Hold on the UIButton on the iPhone? I want my action to trigger when the user holds the button for 2 seconds or more.

任何想法？

推荐答案

UILongPressGestureRecognizer 是您所需要的。例如，

UILongPressGestureRecognizer is what you need. For example,

UILongPressGestureRecognizer *longPress_gr = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(doAction:)];
[longPress_gr setMinimumPressDuration:2]; // triggers the action after 2 seconds of press
[yourButton addGestureRecognizer:longPress_gr];

让你的行动只被触发一次（即，当2秒持续时间结束时），确保你的 doAction：方法看起来像这样，

To let your action get triggered only once(ie., when the 2 seconds duration is over), make sure you have your doAction: method looks something like this,

- (void)doAction:(UILongPressGestureRecognizer *)recognizer {

    if (recognizer.state == UIGestureRecognizerStateBegan) {

        // Your code here
    }
}

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