javascript - Backbone : Reference events to parent object

Question

我想用我的父对象之一替换某个子对象中的 Backbone.Events 系统。示例:

// initialize function of the repository object
initialize: function() {
        var users = new Backbone.Collection();
        
        // we save a reference of our event system in ourEvents object
        var ourEvents = {};
        ourEvents.on = this.on;
        ourEvents.off = this.off;
        ourEvents.trigger = this.trigger;
        ourEvents.bind = this.bind;
        ourEvents.unbind = this.unbind;

        // now we overwrite events in users.collection with our one
        _.extend(users, ourEvents);

        // now we listen on the test event over this
        this.on('test', function() { alert('yiha'); });

        // but triggering over users works too!
        users.trigger('test');
}

正如您一样，我们现在有了某种一对多事件系统。一个监听器和多个可以触发事件的对象。

当我使用与前端具有相同 View 系统的不同 Backbone.Collections 或 Backbone.Models 时，这对我很有帮助。

如您所见，该解决方案还不是最佳的。

是否有更短的方法来覆盖事件系统？

更新: 所以我研究了Backbone源代码，发现Backbone.Events在下面保存了一个回调列表: this._callback。这至少在理论上应该有效:

this.users._callbacks = this._callbacks = {};

Answer 1

Clean Backbone 的方法是将事件绑定(bind)到集合上，而不是出于某种原因尝试从对象复制它们

// initialize function of the repository object
initialize: function() {
        var users = new Backbone.Collection();

        users.on('on', this.on, this);
        users.on('off', this.off, this); // third parameter to set context of method to the current view
        // ...and so on
        // you were listening here on the current view but triggering later on collection - this would never work
        users.trigger('on'); // would call the this.on method in the context of current view
        // if this method would have been triggered from inside of the users collection it would still trigger the desired method inside of this view
}

提示 - 切勿触摸和利用以下划线开头的方法和变量 - 这些是私有(private) API 和属性，并且可能会在下一个版本中随时更改，因为仅保证公共(public)方法/属性不会在版本之间进行更改。我相信你在这里尝试有点过于复杂化，并且看看你所犯的一些错误，你一直在以太多不同的方式尝试有点太努力了:)总是尝试让事情变得简单