主干查看：继承和扩展从父事件 | 继承和扩展从父事件

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问题描述

骨干文档状态：

How do you inherit a parent's view events and extend them?

Parent View

var ParentView = Backbone.View.extend({
   events: {
      'click': 'onclick'
   }
});

Child View

var ChildView = ParentView.extend({
   events: function(){
      ????
   }
});

解决方案

One way is:

var ChildView = ParentView.extend({
   events: function(){
      return _.extend({},ParentView.prototype.events,{
          'click' : 'onclickChild'
      });
   }
});

Another would be:

var ParentView = Backbone.View.extend({
   originalEvents: {
      'click': 'onclick'
   },
   //Override this event hash in
   //a child view
   additionalEvents: {
   },
   events : function() {
      return _.extend({},this.originalEvents,this.additionalEvents);
   }
});

var ChildView = ParentView.extend({
   additionalEvents: {
      'click' : ' onclickChild'
   }
});

To check whether Events is function or object

var ChildView = ParentView.extend({
   events: function(){
      var parentEvents = ParentView.prototype.events;
      if(_.isFunction(parentEvents)){
          parentEvents = parentEvents();
      }
      return _.extend({},parentEvents,{
          'click' : 'onclickChild'
      });
   }
});

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