Javascript 视图中视图中的主干视图-为什么。$el.html（'；在此处插入一些内容'；）什么都不做？

这将是一个相当复杂的问题，所以我将继续添加到它

我的应用程序由两种主要类型的视图构成-标准视图和区域（一种特殊类型的视图，仅用于包含其他视图）。我的根应用程序视图是一个区域，由各种其他区域组成，我可以根据需要“插入”视图

我所有位于主应用程序区域（页眉、页脚、modals等）的视图都工作得非常好。今天我尝试在其他视图中创建一些子区域，但遇到了一个障碍。出于某种原因，当我调用

this.$el.html（）时

在要传入区域的指定视图输出的区域上，什么也没有发生。我可以单步执行代码，视图本身呈现得很好，我可以通过在控制台中查看对象模型来查看标记。但是，它实际上从未连接到页面，我看到的只是表示区域包装器的标记。

这里有一些代码-希望它会有一些意义，但这会下降很多级别

首先，我的视图和区域基类

define(['backbone', 'helpers/cookie-manager'],
    function (Backbone, CookieManager) {

        var spinner = "<img src='/content/images/global/ajax-loader.png' alt='loading...' />";        

        var ministryView = Backbone.View.extend({

            name: 'Unnamed View',
            sectionName: 'No section specified',

            stateRequired: false,

            template: undefined,

            bindings: [],

            initialize: function (options) {
                this.options = options || {};
                Backbone.View.prototype.initialize.call(this, options);
                if (this.options.name) {
                    this.name = this.options.name;
                }
                if (this.options.sectionName) {
                    this.sectionName = this.options.sectionName;
                }
                if (this.options.template) {
                    this.template = this.options.template;
                }
            },

            bindToModel: function (model, ev, callback, that) {
                if (that === undefined || that === null) {
                    throw "The value of 'that' needs the context of the extending class in order to operate correctly.";
                }
                model.bind(ev, callback, that);
                this.bindings.push({ model: model, ev: ev, callback: callback });
            },

            dispose: function () {
                this.unbindFromAllModels();   // Will unbind all events this view has bound to
                this.stopListening();
                this.unbind();                // This will unbind all listeners to events from this view. This is probably not necessary because this view will be garbage collected.
                this.remove();                // Uses the default Backbone.View.remove() method which removes this.el from the DOM and removes DOM events.
                this.undelegateEvents();
            },

            render: function () {
                this.trigger('rendered');
                return this;
            },

            resetStyleState: function(condition) {
            },

            trash: function () {
                this.dispose();
            },

            unbindFromAllModels: function () {
                _.each(this.bindings, function (binding) {
                    binding.model.unbind(binding.ev, binding.callback);
                });
                this.bindings = [];
            }
        });

        var ministryRegion = ministryView.extend({

            name: 'Unnamed Region',

            currentView: undefined,

            initialize: function (options) {
                this.options = options || {};
                ministryView.prototype.initialize.call(this, options);
                if (this.options.currentView) {
                    this.currentView = this.options.currentView;
                }
                _.bindAll(this, 'placeRenderedView');
                _.bindAll(this, 'showRendering');
            },

            placeRenderedView: function () {
                this.$el.html(this.currentView.$el);
                this.currentView.delegateEvents();

                if (this.currentView.postRender !== undefined && this.currentView.postRender !== null) {
                    this.currentView.postRender();
                }
            },

            renderView: function (view) {
                if (view) {
                    if (this.currentView) {
                        this.currentView.trash();
                    }

                    this.currentView = view;
                }

                this.currentView.bind('rendering', this.showRendering);
                this.currentView.bind('rendered', this.placeRenderedView);
                this.currentView.render();
            },

            showRendering: function () {
                this.$el.html(spinner);
            },

            trash: function(disposeRegion) {
                this.currentView.trash();

                if (disposeRegion !== undefined && disposeRegion !== null && disposeRegion !== false) {
                    this.dispose();
                }
            }
        });


        return {
            View: ministryView,
            Region: ministryRegion
        };
    });

…这是一个模板

<section class="meal-plans-container">
</section>

这是一个模板

<ul id="mealPlansList" class="swatch-listview-b">
    <li class="listview-header">Meal Plans</li>
    {{#each plans}}
    <li><span class="meal-plan-id-holder hidden">{{id}}</span>{{name}}</li>
    {{/each}}
</ul>

…而

this.$el.html（this.currentView.$el）；

行根本不起任何作用

---

如果我能提供任何其他帮助，请告诉我。

在本文的帮助下，我设法解决了这个问题-

我重写了

memberHomeView

类，并将区域实例化从

render

移动到

postRender

函数。这确保了模板渲染已经完成，从而允许区域正确实例化（现在我想起来了，这就是为什么我首先创建了

postdrender

方法

这是修改后的函数

define(['ministry', 'jquery', 'views/v-header', 'models/m-ns', 'views/components/components', 'text!templates/hub/member-home.html'],
    function (Ministry, $, Header, Models, Components, TemplateSource) {    
        var memberHomeView = Ministry.SecureView.extend({

            name: 'Member Home',
            sectionName: 'Hub',

            mealPlansRegion: undefined,

            template: Handlebars.compile(TemplateSource),

            headerView: new Header({ text: 'Kitchen Hub', swatch: 'a' }),

            initialize: function (options) {
                Ministry.SecureView.prototype.initialize.call(this, options);
            },

            // Need to override the normal secured view implementation.
            render: function () {
                this.$el.html(this.template(this));
                this.trigger('rendered');
                return this;
            },

            postRender: function () {
                if (!this.isSecured()) {
                    SiansPlanApp.router.navigate('/');
                    SiansPlanApp.renderHome(false);
                } else {
                    // MOVED THE REGION INSTANTIATION HERE
                    this.mealPlansRegion = new Ministry.Region({ el: '.meal-plans-container' });
                    this.mealPlansRegion.renderView(new Components.MealPlansList({ collection: new Models.MealPlan.OwnedCollection({ username: SiansPlanApp.session.username() }) }));
                }
            }
        });

        return memberHomeView;
    });

简单地说

---

如果附加到外部标记，请确保在尝试添加使用该标记的子视图或区域之前已呈现该标记，否则您可能会哭泣。

---

<ul id="mealPlansList" class="swatch-listview-b">
    <li class="listview-header">Meal Plans</li>
    {{#each plans}}
    <li><span class="meal-plan-id-holder hidden">{{id}}</span>{{name}}</li>
    {{/each}}
</ul>

        placeRenderedView: function () {
            this.$el.html(this.currentView.$el);
            this.currentView.delegateEvents();

            if (this.currentView.postRender !== undefined && this.currentView.postRender !== null) {
                this.currentView.postRender();
            }
        },

define(['ministry', 'jquery', 'views/v-header', 'models/m-ns', 'views/components/components', 'text!templates/hub/member-home.html'],
    function (Ministry, $, Header, Models, Components, TemplateSource) {    
        var memberHomeView = Ministry.SecureView.extend({

            name: 'Member Home',
            sectionName: 'Hub',

            mealPlansRegion: undefined,

            template: Handlebars.compile(TemplateSource),

            headerView: new Header({ text: 'Kitchen Hub', swatch: 'a' }),

            initialize: function (options) {
                Ministry.SecureView.prototype.initialize.call(this, options);
            },

            // Need to override the normal secured view implementation.
            render: function () {
                this.$el.html(this.template(this));
                this.trigger('rendered');
                return this;
            },

            postRender: function () {
                if (!this.isSecured()) {
                    SiansPlanApp.router.navigate('/');
                    SiansPlanApp.renderHome(false);
                } else {
                    // MOVED THE REGION INSTANTIATION HERE
                    this.mealPlansRegion = new Ministry.Region({ el: '.meal-plans-container' });
                    this.mealPlansRegion.renderView(new Components.MealPlansList({ collection: new Models.MealPlan.OwnedCollection({ username: SiansPlanApp.session.username() }) }));
                }
            }
        });

        return memberHomeView;
    });