Backbone.js 在backbonejs中处理僵尸视图的方法失败

所以我在我的主干应用程序中遇到了同样著名的僵尸视图问题。我试着成为超级英雄：P

var Router=Backbone.Router.extend({
             routes:{
                  "":"loadDashboard",
                  "home":"loadDashboard",
                  'post-leads':"loadPostLeads"
                },
                initialize:function(){
                window.currentView=null;
                },

            loadPostLeads:function(){
            require(['views/post-leads'],function(leads){
            if(window.currentView!=null)
            {window.currentView.remove();}
            window.currentView=new leads();
            window.currentView.render();
            })

        },

              loadDashboard: function(){
        require(['views/dashboard'],function(dashboard){
            if(window.currentView!=null)
            {window.currentView.remove();}
            window.currentView=new dashboard();
            window.currentView.render();
            })
        }
          });

---

这不管用。我想要一些简单的东西，不想用木偶或任何类似的东西。上面出了什么问题？这是一种明智的方法吗？

原则上，你所做的应该是可行的，但有些事情主干网无法清理，因为它不知道

首先，您应该确保您使用的是最新版本的主干（

0.9.9

或更新版本）。对事件绑定代码进行了一些改进，这使得

视图更容易。remove

方法可以执行所有必要的清理

常见的问题有：

收听模型事件：

//don't use other.on (Backbone doesn't know how to clean up)
this.model.on('event', this.method);

//use this.listenTo (Backbone cleans up events when View.remove is called)
//requires Backbone 0.9.9
this.listenTo(this.model, 'event', this.method);

//if you listen to events for nodes that are outside View.el
$(document).on('event', this.method);

//you have to clean them up. A good way is to override the View.remove method
remove: function() {
  $(document).off('event', this.method);
  Backbone.View.prototype.remove.call(this);
}

//you may hold a direct reference to the view:
this.childView = otherView;

//or one of its methods
this.callback = otherView.render;

//or as a captured function scope variable:
this.on('event', function() {
  otherView.render();
});

//if you create a closure over your view, or any method of your view, 
//someone else may still hold a reference to your view:
method: function(arg) {
  var self = this;
  return function() {
    self.something(x);
  }
}

侦听视图范围之外的DOM事件：

//don't use other.on (Backbone doesn't know how to clean up)
this.model.on('event', this.method);

//use this.listenTo (Backbone cleans up events when View.remove is called)
//requires Backbone 0.9.9
this.listenTo(this.model, 'event', this.method);

//if you listen to events for nodes that are outside View.el
$(document).on('event', this.method);

//you have to clean them up. A good way is to override the View.remove method
remove: function() {
  $(document).off('event', this.method);
  Backbone.View.prototype.remove.call(this);
}

//you may hold a direct reference to the view:
this.childView = otherView;

//or one of its methods
this.callback = otherView.render;

//or as a captured function scope variable:
this.on('event', function() {
  otherView.render();
});

//if you create a closure over your view, or any method of your view, 
//someone else may still hold a reference to your view:
method: function(arg) {
  var self = this;
  return function() {
    self.something(x);
  }
}

直接引用：

//don't use other.on (Backbone doesn't know how to clean up)
this.model.on('event', this.method);

//use this.listenTo (Backbone cleans up events when View.remove is called)
//requires Backbone 0.9.9
this.listenTo(this.model, 'event', this.method);

//if you listen to events for nodes that are outside View.el
$(document).on('event', this.method);

//you have to clean them up. A good way is to override the View.remove method
remove: function() {
  $(document).off('event', this.method);
  Backbone.View.prototype.remove.call(this);
}

//you may hold a direct reference to the view:
this.childView = otherView;

//or one of its methods
this.callback = otherView.render;

//or as a captured function scope variable:
this.on('event', function() {
  otherView.render();
});

//if you create a closure over your view, or any method of your view, 
//someone else may still hold a reference to your view:
method: function(arg) {
  var self = this;
  return function() {
    self.something(x);
  }
}

闭包：

//don't use other.on (Backbone doesn't know how to clean up)
this.model.on('event', this.method);

//use this.listenTo (Backbone cleans up events when View.remove is called)
//requires Backbone 0.9.9
this.listenTo(this.model, 'event', this.method);

//if you listen to events for nodes that are outside View.el
$(document).on('event', this.method);

//you have to clean them up. A good way is to override the View.remove method
remove: function() {
  $(document).off('event', this.method);
  Backbone.View.prototype.remove.call(this);
}

//you may hold a direct reference to the view:
this.childView = otherView;

//or one of its methods
this.callback = otherView.render;

//or as a captured function scope variable:
this.on('event', function() {
  otherView.render();
});

//if you create a closure over your view, or any method of your view, 
//someone else may still hold a reference to your view:
method: function(arg) {
  var self = this;
  return function() {
    self.something(x);
  }
}

避免以下陷阱应有助于正确清理视图

根据评论进行编辑：

//don't use other.on (Backbone doesn't know how to clean up)
this.model.on('event', this.method);

//use this.listenTo (Backbone cleans up events when View.remove is called)
//requires Backbone 0.9.9
this.listenTo(this.model, 'event', this.method);

//if you listen to events for nodes that are outside View.el
$(document).on('event', this.method);

//you have to clean them up. A good way is to override the View.remove method
remove: function() {
  $(document).off('event', this.method);
  Backbone.View.prototype.remove.call(this);
}

//you may hold a direct reference to the view:
this.childView = otherView;

//or one of its methods
this.callback = otherView.render;

//or as a captured function scope variable:
this.on('event', function() {
  otherView.render();
});

//if you create a closure over your view, or any method of your view, 
//someone else may still hold a reference to your view:
method: function(arg) {
  var self = this;
  return function() {
    self.something(x);
  }
}

啊，你的问题中没有提到全部问题。据我推测，您的方法存在的问题是，您试图将两个视图渲染到同一个元素中：

var View1 = Backbone.View.extend({el:"#container" });
var View2 = Backbone.View.extend({el:"#container" });

当您删除

View1

时，

View2

无法正确渲染

您不应该指定视图

el

，而应该将视图渲染到元素中。在页面上应该有一个

#container

元素，并将视图的元素附加到容器中

loadPostLeads: function () {
  var self = this;
  require(['views/post-leads'], function (leads) {
    self.renderView(new leads());
  })
},

loadDashboard: function () {
  var self = this;
  require(['views/dashboard'], function (dashboard) {
    self.renderView(new dashboard());
  })
},

renderView: function(view) {
  if(window.currentView) {
    window.currentView.remove();
  }

  //the view itself does not specify el, so you need to append the view into the DOM
  view.render();
  $("#container").html(view.el);

  window.currentView = view;
}

---

原则上，你所做的应该是可行的，但有些事情主干网无法清理，因为它不知道

首先，您应该确保您使用的是最新版本的主干（

0.9.9

或更新版本）。对事件绑定代码进行了一些改进，这使得

视图更容易。remove

方法可以执行所有必要的清理

常见的问题有：

收听模型事件：

//don't use other.on (Backbone doesn't know how to clean up)
this.model.on('event', this.method);

//use this.listenTo (Backbone cleans up events when View.remove is called)
//requires Backbone 0.9.9
this.listenTo(this.model, 'event', this.method);

//if you listen to events for nodes that are outside View.el
$(document).on('event', this.method);

//you have to clean them up. A good way is to override the View.remove method
remove: function() {
  $(document).off('event', this.method);
  Backbone.View.prototype.remove.call(this);
}

//you may hold a direct reference to the view:
this.childView = otherView;

//or one of its methods
this.callback = otherView.render;

//or as a captured function scope variable:
this.on('event', function() {
  otherView.render();
});

//if you create a closure over your view, or any method of your view, 
//someone else may still hold a reference to your view:
method: function(arg) {
  var self = this;
  return function() {
    self.something(x);
  }
}

侦听视图范围之外的DOM事件：

//don't use other.on (Backbone doesn't know how to clean up)
this.model.on('event', this.method);

//use this.listenTo (Backbone cleans up events when View.remove is called)
//requires Backbone 0.9.9
this.listenTo(this.model, 'event', this.method);

//if you listen to events for nodes that are outside View.el
$(document).on('event', this.method);

//you have to clean them up. A good way is to override the View.remove method
remove: function() {
  $(document).off('event', this.method);
  Backbone.View.prototype.remove.call(this);
}

//you may hold a direct reference to the view:
this.childView = otherView;

//or one of its methods
this.callback = otherView.render;

//or as a captured function scope variable:
this.on('event', function() {
  otherView.render();
});

//if you create a closure over your view, or any method of your view, 
//someone else may still hold a reference to your view:
method: function(arg) {
  var self = this;
  return function() {
    self.something(x);
  }
}

直接引用：

//don't use other.on (Backbone doesn't know how to clean up)
this.model.on('event', this.method);

//use this.listenTo (Backbone cleans up events when View.remove is called)
//requires Backbone 0.9.9
this.listenTo(this.model, 'event', this.method);

//if you listen to events for nodes that are outside View.el
$(document).on('event', this.method);

//you have to clean them up. A good way is to override the View.remove method
remove: function() {
  $(document).off('event', this.method);
  Backbone.View.prototype.remove.call(this);
}

//you may hold a direct reference to the view:
this.childView = otherView;

//or one of its methods
this.callback = otherView.render;

//or as a captured function scope variable:
this.on('event', function() {
  otherView.render();
});

//if you create a closure over your view, or any method of your view, 
//someone else may still hold a reference to your view:
method: function(arg) {
  var self = this;
  return function() {
    self.something(x);
  }
}

闭包：

//don't use other.on (Backbone doesn't know how to clean up)
this.model.on('event', this.method);

//use this.listenTo (Backbone cleans up events when View.remove is called)
//requires Backbone 0.9.9
this.listenTo(this.model, 'event', this.method);

//if you listen to events for nodes that are outside View.el
$(document).on('event', this.method);

//you have to clean them up. A good way is to override the View.remove method
remove: function() {
  $(document).off('event', this.method);
  Backbone.View.prototype.remove.call(this);
}

//you may hold a direct reference to the view:
this.childView = otherView;

//or one of its methods
this.callback = otherView.render;

//or as a captured function scope variable:
this.on('event', function() {
  otherView.render();
});

//if you create a closure over your view, or any method of your view, 
//someone else may still hold a reference to your view:
method: function(arg) {
  var self = this;
  return function() {
    self.something(x);
  }
}

避免以下陷阱应有助于正确清理视图

根据评论进行编辑：

//don't use other.on (Backbone doesn't know how to clean up)
this.model.on('event', this.method);

//use this.listenTo (Backbone cleans up events when View.remove is called)
//requires Backbone 0.9.9
this.listenTo(this.model, 'event', this.method);

//if you listen to events for nodes that are outside View.el
$(document).on('event', this.method);

//you have to clean them up. A good way is to override the View.remove method
remove: function() {
  $(document).off('event', this.method);
  Backbone.View.prototype.remove.call(this);
}

//you may hold a direct reference to the view:
this.childView = otherView;

//or one of its methods
this.callback = otherView.render;

//or as a captured function scope variable:
this.on('event', function() {
  otherView.render();
});

//if you create a closure over your view, or any method of your view, 
//someone else may still hold a reference to your view:
method: function(arg) {
  var self = this;
  return function() {
    self.something(x);
  }
}

啊，你的问题中没有提到全部问题。据我推测，您的方法存在的问题是，您试图将两个视图渲染到同一个元素中：

var View1 = Backbone.View.extend({el:"#container" });
var View2 = Backbone.View.extend({el:"#container" });

当您删除

View1

时，

View2

无法正确渲染

您不应该指定视图

el

，而应该将视图渲染到元素中。在页面上应该有一个

#container

元素，并将视图的元素附加到容器中

loadPostLeads: function () {
  var self = this;
  require(['views/post-leads'], function (leads) {
    self.renderView(new leads());
  })
},

loadDashboard: function () {
  var self = this;
  require(['views/dashboard'], function (dashboard) {
    self.renderView(new dashboard());
  })
},

renderView: function(view) {
  if(window.currentView) {
    window.currentView.remove();
  }

  //the view itself does not specify el, so you need to append the view into the DOM
  view.render();
  $("#container").html(view.el);

  window.currentView = view;
}

---

我LOLed@superhero:D:）有关于这个方法的词吗？我LOLed@superhero:D:）有关于这个方法的词吗？看，当我执行代码时，它会删除它。但是当我创建一个新的视图并执行console.log（window.currentView）时，它会将el显示为未定义：（@beNerd，编辑了我的答案。你真的应该尝试在原始问题中提供所有信息。你可能希望

返回Backbone.view.prototype.remove.call（这个）

在您的

中删除

以匹配默认行为。请参阅，当我执行代码时，它会删除它。但当我创建新视图并执行console.log（window.currentView）时，它会将el显示为未定义：（@beNerd，编辑了我的答案。你真的应该尝试在原始问题中提供所有信息。你可能希望

返回Backbone.View.prototype.remove.call（this）；

在

remove

中匹配默认行为。