BackboneJS-View undelegateEvents

更新于 2025/12/5 1:32:00

描述

用于从 DOM 中删除视图的委托事件。

语法

delegateEvents()

示例

<!DOCTYPE html>
   <head>
      <title>View Example</title>
      <script src = "https://code.jquery.com/jquery-2.1.3.min.js" 
         type = "text/javascript"></script>
      
      <script src = "https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.2/underscore-min.js" 
         type = "text/javascript"></script>
      
      <script src = "https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.1.2/backbone-min.js"  
         type = "text/javascript"></script>
   </head>
   
   <body>
      <div id = "mydiv"></div>
      <script type = "text/javascript">
         //'ViewDemo' 是视图类的名称
         var ViewDemo = Backbone.View.extend({

            //当点击事件发生时，它会激活定义的函数“undelegateFunc”
            events: {'click button': 'undelegateFunc'}, undelegateFunc: function () {
               document.write("do something...");
               $(this.el).undelegate('button', 'click');
            },

            //'render' 提供构造视图所需的逻辑
            render: function () {

               //'$el' 是缓存对象，它推送其中定义的内容，并且
               //当用户点击按钮时显示值
               this.$el.html('<button>Click to undelegate</button>');
            },

            //实例化视图时调用此函数
            initialize:function(){this.render();}
         });

         //'myview' 是 'ViewDemo' 类的实例
         var myview = new ViewDemo({el: '#mydiv'});
      </script>
      
   </body>
</html>