我在自定义UIView.to中正确运行UITapGestureRecognizer时遇到问题。我创建了一个视图:CategoryViewButton,它在init中添加了一个UITapGestureRecognizer:
class CategoryViewButton: UIView {
override init(frame: CGRect) {
super.init(frame: frame)
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(self.handleTap))
self.addGestureRecognizer(tapGesture)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func handleTap() {
print("Hello again")
}
}
直接在视图控制器中添加时,此手势识别器可以正常工作。但是,当我将CategoryViewButton添加为另一个自定义视图的子视图时,不会调用手势识别器方法。我的子视图:
class CategoryView: UIView, CategoryButtonDelegate {
var button : CategoryViewButton?
override init(frame: CGRect) {
super.init(frame: frame)
button = CategoryViewButton(frame: CGRect(x: 10, y: 0, width: 40, height: 25))
self.addSubview(button!)
self.bringSubview(toFront: button!)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
当我在View Controller中创建一个CategoryView时,不会调用handleTap()函数。我错过了什么?
答案 0 :(得分:6)
对于任何好奇的人来说,问题是带有手势识别器的子视图超出了超视图的框架。这意味着即使正在绘制视图,也未检测到手势