         super.didReceiveMemoryWarning()
     }
     
-    func btnAction() {
+    /// 单选事件
+    func singleBtnAction1() {
         
         /// 单选相册默认导航
         //self.photoAlbum(false)
         
         //单选相册自定义导航
-//        self.photoAlbum(false, .lightContent, UIColor.black, tintColor: UIColor.white, bgColor: UIColor.white)
-        
-        /// 单选相册默认导航
+        self.photoAlbum(false, .lightContent, UIColor.black, tintColor: UIColor.white, bgColor: UIColor.white)
+    }
+    
+    /// 多选事件
+    func doubleBtnAction2()  {
+        /// 多选相册默认导航
         //self.photoAlbum(true)
         
         //多选相册自定义导航
         self.photoAlbum(true, .lightContent, UIColor.black, tintColor: UIColor.white, bgColor: UIColor.white)
+        
     }
 
 }

        myImageView.contentMode = .scaleAspectFill
        myImageView.clipsToBounds = true
    }
    
//    /// UIImage异步回调
//    ///

    override func viewDidLoad() {
        super.viewDidLoad()

        let btn_single = UIButton(type: .custom)
        btn_single.frame = CGRect(x: 50, y: 100, width: 100, height: 50)
        btn_single.backgroundColor = UIColor.yellow
        btn_single.setTitle("单选照片", for: .normal)
        btn_single.setTitleColor(UIColor.black, for: .normal)
        btn_single.addTarget(self, action: #selector(singleBtnAction1), for: .touchUpInside)
        view.addSubview(btn_single)
        
        let btn_double = UIButton(type: .custom)
        btn_double.frame = CGRect(x: cnScreenW - 150, y: 100, width: 100, height: 50)
        btn_double.backgroundColor = UIColor.yellow
        btn_double.setTitle("多选照片", for: .normal)
        btn_double.setTitleColor(UIColor.black, for: .normal)
        btn_double.addTarget(self, action: #selector(doubleBtnAction2), for: .touchUpInside)
        view.addSubview(btn_double)
        
        myImageView.frame = CGRect(x: 0, y: 250, width: UIScreen.main.bounds.size.width, height: UIScreen.main.bounds.width)
        myImageView.backgroundColor = UIColor.green
