Swift 判断多个视图控件的交互事件

使用代码循环创建多个视图进行交互时候，可以通过tag值判断点击的是哪个视图或控件

比如下面3个常用的UI组件，UIImageView 和 UILabel 都是直接继承 UIView的，因为 UIView 又是 UIResponder 子类，这意味着视图是允许用户交互的。创建时候默认是没有打开交互的，所以增加手势事件时候，记得启动用户交互。而UIButton 是进行封装过的，已经默认有点击事件的。其他类似组件可以自己查看官网继承关系进行学习利用。

详情：🍎 iOS Developer Library

UIimageView UILabel UIButton

ImageView

    // ImageView
    let imageView = UIImageView()
    imageView.tag = i // tag值
    imageView.userInteractionEnabled = true //启动用户交互
    let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(TappedClick)) 
    imageView.addGestureRecognizer(tapGestureRecognizer) //增加点击手势

---

    func imageTapped(recognizer: UITapGestureRecognizer) {

        switch recognizer.view!.tag {
        case 0...6: 
            print("\(recognizer.view!.tag)") 
        default:
            break
        }

    }

Label

    // label
    let label = UILabel()
    label.tag = i // tag值
    label.userInteractionEnabled = true //启动用户交互
    let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(TappedClick))
    label.addGestureRecognizer(tapGestureRecognizer)  //增加点击手势

---

    func labelTapped(recognizer: UITapGestureRecognizer) {

        switch recognizer.view!.tag {
        case 0...6:
            print("\(recognizer.view!.tag)")
        default:
            break
        }
    }              

button

   // button
    let btn = UIButton()
    btn.tag = i 
    btn.addTarget(self, action: "btnClick:", forControlEvents: .TouchUpInside)

---

    func btnClick(sender: UIButton) {
        
        switch sender.tag {
        case 0...6:
            print("\(sender.tag)")
        default:
            break
        }
    }