图片加载和添加手势事件

 private lazy var imageV1 : UIImageView = {
    let v1 = UIImageView()
        v1.userInteractionEnabled = true
        v1.layer.cornerRadius = 8    // 添加圆角
        v1.layer.masksToBounds = true    //裁剪超出部分
        v1.image = UIImage(named: "detail.jpg")
        v1.backgroundColor = UIColor.purpleColor()
        var tap = UITapGestureRecognizer(target: self, action: #selector(ViewController.photoOnlick))
        v1.addGestureRecognizer(tap)
        return v1
    }()

 func photoOnlick(){
        
        print("-------")
        
    }

按钮属性设置和点击事件

private lazy var btn:UIButton = {
    let btn = UIButton()
        btn.backgroundColor = UIColor.redColor()
        btn.setTitle("关注", forState: UIControlState.Normal)
        btn.setTitle("已关注", forState: UIControlState.Selected)

       //非传递按钮点击事件
        btn.addTarget(self, action:#selector(ViewController.tapped), forControlEvents:.TouchUpInside)  

       //传递按钮点击事件
        btn.addTarget(self, action:#selector(tapped), forControlEvents:.TouchUpInside)     

        return btn
    
    }()

@objc private func tapped(){
        btn.selected = false
    }    //非传递按钮点击事件,前面添加@objc,当OC方法来处理

@objc private func tapped(btn:UIButton){
        btn.selected = false
    }    //传递按钮点击事件,前面添加@objc,当OC方法来处理