Question

我正在寻找一种更好的方法来实现Backbone的PubSub类型功能。我目前正在实现这一目标，但我正在寻找更好的方法来实现它。

示例路由代码

var AppRouter = Backbone.Router.extend({
   customEvents: _.extend({}, Backbone.Events),

   routes: {
     "login": "login"
   },

   //Injecting custom event
   login: function(){
       this.before(function () {
           app.showView('#Content', new LoginView({customEvents:this.customEvents}), "login", true);

     }); 
   },

    //Injecting custom event
   otherView: function(){
       this.before(function () {
           app.showView('#Header', new OtherView({customEvents:this.customEvents}), "login", true);

     }); 
   },

    ..... more code

});

示例查看代码。请注意，我使用bind来侦听customEvent。这很好，但寻找替代方法

LoginView = Backbone.View.extend({
   initialize: function(options){
      this.customEvents = options.customEvents;
      this.customEvents.bind('app:loggedin', this.loggedIn);

   },

   loggedIn: function(){
       console.log("LOG CHANGED");
   },

 ...more code

我更愿意将我的事件与我在View中使用的其他事件保持一致。不知道如何实现这一目标。我应该扩展View类吗？

我想在观点上做些什么

  LoginView = Backbone.View.extend({
    events: {
         "app:loggin" : "loggedIn"
     },

     loggedIn: function(){
       console.log("LOG CHANGED");
    },

 ...more code

Answer 1

要点：https://gist.github.com/vermilion1/5600032

演示：http://jsfiddle.net/vpetrychuk/3NVG9/1

代码预览：

// -- BASE VIEW ------------------

var BaseView = Backbone.View.extend({
    constructor : function (options) {
        Backbone.View.prototype.constructor.apply(this, arguments);
        this._eventAggregator = options && options.eventAggregator || this;
        this._parseTriggers();
    },
    _parseTriggers :  function () {
        _.each(this.triggers || {}, function (fn, event) {
            var handler = this[fn];
            if (_.isFunction(handler)) {
                this.listenTo(this._eventAggregator, event, handler);
            }
        },
        this);
    }
});

// -- TEST ------------------

var View = BaseView.extend({
    triggers : {
        'hello' : 'helloHandler',
        'bye' : 'byeHandler'
    },
    helloHandler :  function (name) {
        console.log('hello, ' + name);
    },
    byeHandler :  function (name) {
        console.log('bye, ' + name);
    }
});

var view1 = new View();
view1.trigger('hello', 'dude 1'); // -> hello, dude 1
view1.trigger('bye', 'dude 1'); // -> bye, dude 1 

var vent = _.extend({}, Backbone.Events);
var view2 = new View({eventAggregator:vent});
vent.trigger('hello', 'dude 2'); // -> hello, dude 2
vent.trigger('bye', 'dude 2'); // -> bye, dude 2

backbone.js中的自定义事件没有绑定

1 个答案: