swift - 如何使用 tochesBegan() 方法作为类的扩展？

Question

如何将 touchesBegan() 方法添加到我的类中？

这是我的方法:

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {

    for touch in touches{

        let locationUser = touch.location(in: self)

        }}

Answer 1

您可以使用类扩展在其中添加方法，如果您 类是 UIView 或 UIWindow 的子类:

extension YourClass {
    override open func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        super.touchesBegan(touches, with: event)
        for touch in touches{
            let locationUser = touch.location(in: self)
        }
        print("touchesBegan")
    }
}