Question

我在视图上点按两次UITapGestureRecognizer，然后在其子视图上点击UITapGestureRecognizer。

    let parentGR = UITapGestureRecognizer(target: self, action: "doubleTappedParent")
    parentGR.numberOfTapsRequired = 2
    parentView.addGestureRecognizer(parentGR)

    let childGR = UITapGestureRecognizer(target: self, action: "singleTappedChild")
    childGR.numberOfTapsRequired = 1
    childView.addGestureRecognizer(childGR)

当我双击子视图时，会触发这两个操作。我怎样才能让单击手势＆＃34;取消＆＃34;双击手势？

Answer 1

使用requireGestureRecognizerToFail在识别器之间创建关系。例如：

gr2.requireGestureRecognizerToFail(gr)

更新：正如评论中提到的@ tumber033，在他的示例中gr2和gr应该互换，以便应该有

parentGR.requireGestureRecognizerToFail(childGR)

双击手势在父母视图和单击子手势上儿童视图

1 个答案: