[英]Show UIView on long tap on button
也许有人已经问过这个问题,但是我还没有找到。
我的屏幕上有一些按钮,当用户点击一个按钮(按住该按钮约2秒钟)时,新的UIView应当显示在用户点击的位置。 就像iOS键盘上的按钮一样,如果您点击(例如)“ E”按钮,它将显示一个包含一些额外按钮的新视图。
我没有找到任何解决方案,该如何做,所以如果您知道如何解决该问题,请帮助我。
编辑:我已经添加了LongPressGestureRecognizer,但是这个手势永远不会触发。
这是我的代码:
var longPressGestureRecognizer = UILongPressGestureRecognizer(target: self, action: "buttonLongPressed:")
longPressGestureRecognizer.minimumPressDuration = 1.5
longPressGestureRecognizer.allowableMovement = 1
for buttonTitle in buttonTitles{
var button : UIButton!
if(buttonTitle.length == 1) {
button = createButtonWithTitle(buttonTitle)
} else {
button = createButtonWithImage(buttonTitle)
}
button.addGestureRecognizer(longPressGestureRecognizer)
}
func buttonLongPressed(recognizer : UILongPressGestureRecognizer) -> (Void) {
NSLog("tapped")
if(recognizer.state == UIGestureRecognizerState.Failed) {
NSLog("failed")
}
if(recognizer.state == UIGestureRecognizerState.Ended) {
NSLog("ended")
}
if(recognizer.state == UIGestureRecognizerState.Began) {
NSLog("began")
}
}
//set gesture recognizer for long press
UILongPressGestureRecognizer *gestureRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressedHandler:)];
[button addGestureRecognizer:gestureRecognizer];
[gestureRecognizer release];
UILongPressGestureRecognizer *longpress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(action:)];
longpress.minimumPressDuration = 0.3;
[<button> addGestureRecognizer:longpress];
- (void)action:(UILongPressGestureRecognizer *)gesture {
}
使用上面的代码段,可以帮助您在长按和长按时间修改后触发动作。
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