ios - 限制 UISwipeGestureRecognizer 区域

Question

我使用许多 UISwipeGestureRecognizer 作为菜单的选择器。由于我有多个，因此我需要有限的滑动检测区域。这是我正在使用的代码:

 var rightSwipe = UISwipeGestureRecognizer(target: self, action: Selector("handleSwipe1"))

 rightSwipe.direction = .right

 view.addGestureRecognizer(rightSwipe)

我尝试将其添加到 UIImageView 但它不会检测触摸。

Answer 1

对于 UIImage 和 UILabel，

isUserInteractionEnabled 默认为 false。将其设置为 true。

据我所知，你无法限制手势区域。但您可以检查手势的位置并决定如何处理它。

例如:

func addGesture() {
    let rightGesture = UISwipeGestureRecognizer(target: self, action: #selector(someAction(sender:)))
    rightGesture.direction = .right

    let leftGesture = UISwipeGestureRecognizer(target: self, action: #selector(someAction(sender:)))
    leftGesture.direction = .right

    view.addGestureRecognizer(rightGesture)
    view.addGestureRecognizer(leftGesture)
}

func someAction(sender: UISwipeGestureRecognizer) {
    let location = sender.location(in: view)
    if location.x > view.frame.width / 2 && sender.direction == .right {
        // do something
    } else if location.x < view.frame.width / 2 && sender.direction == .left {
        // do something else
    }
}