UILabel UILongPressGestureRecognizer不工作？

如何获得UILongPressGestureRecognizer上的UILongPressGestureRecognizer当我实现下面的代码，它不会调用该函数。 那么请告诉我我做了什么错事？

 UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(LabelLongPressed:)]; longPress.minimumPressDuration = 0.5; // Seconds longPress.numberOfTapsRequired = 0; [objlblDuplicate addGestureRecognizer:longPress]; [longPress release]; 

Answer 1

默认情况下，UILabel无法获得触摸事件。

 objlblDuplicate.userInteractionEnabled = YES;