骨库的实例太多。查看和backbone.model

Question

我有一个主视图，负责呈现其他视图...... 这是完整的代码（1）（2）（3）。

当我加载第一次视图时（View1，View2，View3），一切都可以。
然后，如果我尝试重新加载view更改它。这显然看起来很好..
但我注意到有一些僵尸观点......，
我的意思是在内存中先前视图的实例。
我发现这是使用这个代码的平安...

View1 = Backbone.View.extend({
    initialize: function ()
    {
        this.model.on('change', function () {
            console.log(this.cid);
        }, this); 
    }
});

.

展望cid我发现每次我重新加载查看新视图 生成不同的CID并保持内存。 exampple

** first load **:
console.log(this.cid); // cid:12

** Second load **
console.log(this.cid); // cid:12
console.log(this.cid); // cid:13

.

等...

我的设计有什么问题？我怎样才能解决它？

---

（1）入口点

require([
    "js/mainApp"
    ], function(App){
        App.initialize(data.id);
});

.

---

（2）mainapp

define([
    "js/views/taskDetailView"
], function (TaskDetailView) {

    var initialize = function(task_id){

        var vent;

        vent = _.extend({}, Backbone.Events); // The Event Aggregator

        var taskDetailView = new TaskDetailView({
            task_id: task_id,
            vent: vent
        });

        $(".project-content").html(taskDetailView.$el);
    }

    return { 
        initialize: initialize
    };
});

.

---

（3）

define([
    "js/views/view1",
    "js/views/view2",
    "js/views/view3",
    "text!templates/Task/TaskDetailedView.html"
], function (View1, View2, View3, taskDetailedViewTemplate) {

    var TaskDetailView = Backbone.View.extend({

        el: $(".project-content"),

        initialize: function ()
        {
            this.render();
        },

        render: function ()
        {
            var options;
            // render from template and assign this.el to the root of the element
            // e.g .project-content
            this.setElement($(Mustache.render(taskDetailedViewTemplate)));
            this.view1 = new View1(_.extend( {el:this.$("#taskView")} , this.options));
            this.view2 = new View2(_.extend( {el:this.$("#feedView")} , this.options));
            this.view3 = new View3(_.extend( {el:this.$("#followerView")} , this.options));
        }
    });    

    return TaskDetailView;
});

.

Answer 1

Are you forgetting to actually remove the views from the DOM

http://documentcloud.github.com/backbone/#View-remove

Just assigning another view to the same element won't remove the previous view (more then one view can reference the same element).

Edit:

You might want to try checking if the views exist before reassigning them

    render: function ()
    {
        var options;
        // render from template and assign this.el to the root of the element
        // e.g .project-content

     if (this.view1 != null) {
       this.view1.remove();
      }

     //the rest of your code

Edit2:

I don't know how your mainApp gets called for the second time, but perhaps you might want to try having it keep a refference to the TaskDetailsView

One way to try is before assigning a new TaskDetailsView clean up the existing one

 if (this._taskDetailsView != null) { 
     this._taskDetailsView.cleanUp().remove(); 
    }

 var taskDetailView = new TaskDetailView({
            task_id: task_id,
            vent: vent
  });
    this._taskDetailsView = taskDetailView;

A better way would probably involve just refreshing the necessary parts of the view

define([
    "js/views/taskDetailView"
], function (TaskDetailView) {

    var _taskDetailView;
    var initialize = function(task_id){

        var vent;

        vent = _.extend({}, Backbone.Events); // The Event Aggregator

        if (this._taskDetailsView == null) { 
        var taskDetailView = new TaskDetailView({
            task_id: task_id,
            vent: vent
        });
          this._taskDetailsView = taskDetailView;
        } else {
            this._taskDetailsView.refresh({task_id: task_id,
              vent: vent
           });

          }
        $(".project-content").html(taskDetailView.$el);
    }

    return { 
        initialize: initialize
    };
});