这将是一个非常复杂的问题，因此我会继续添加它。
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，由我可以包含的各种其他区域组成然后根据需要“插入”视图。
我在主应用程序区域（页眉，页脚，模态等）中的所有视图都可以正常工作。今天我尝试在其他视图中创建一些子区域，但我遇到了障碍。出于某种原因，当我在区域上调用this.$el.html()来传递区域指定视图的输出时，没有任何反应。我可以单步执行代码，视图很好地呈现在内部，我可以通过查看控制台中的对象模型来查看标记。但是它实际上从未加入到页面中，我看到的只是代表区域包装器的标记。
这里有一些代码 - 希望它有一定道理，但这可以达到相当多的水平...
首先是视图和区域的基类......
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
};
});
现在加载到应用中的视图包含我要将视图加载到（mealPlansRegion）的区域...
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.mealPlansRegion = new Ministry.Region({ el: '.meal-plans-container' });
this.mealPlansRegion.renderView(new Components.MealPlansList({ collection: new Models.MealPlan.OwnedCollection({ username: App.session.username() }) }));
this.trigger('rendered');
return this;
},
postRender: function () {
if (!this.isSecured()) {
App.router.navigate('/');
App.renderHome(false);
}
}
});
return memberHomeView;
});
......这是模板......
<section class="meal-plans-container">
</section>
...目前只包含该地区的占位符。最终，目的是让其中的几个具有可互换的内容。最后，这是我正在尝试加载的视图......
define(['ministry', 'jquery', 'models/m-meal-plan', 'text!templates/components/meal-plans-list.html'],
function(Ministry, $, MealPlan, TemplateSource) {
var mealPlansListView = Ministry.SecureView.extend({
name: 'Meal Plans List Component',
template: Handlebars.compile(TemplateSource),
render: function () {
var that = this;
if (this.isSecured()) {
this.collection.on('fetching', function () {
that.trigger('rendering');
});
this.collection.fetch({
success: function() {
that.bindData();
that.trigger('rendered');
},
error: function(model, xhr) {
that.$el.html('Unable to fetch meal plan data');
if (console !== undefined && console !== null) {
console.log('Fetch Meal Plan failed: ' + xhr.responseText);
}
that.trigger('rendered');
}
});
} else {
this.applySecureLoginPrompt();
}
return this;
},
bindData: function () {
this.$el.html(this.template({ plans: this.collection.toJSON() }));
}
});
return mealPlansListView;
});
它是模板......
<ul id="mealPlansList" class="swatch-listview-b">
<li class="listview-header">Meal Plans</li>
{{#each plans}}
<li><span class="meal-plan-id-holder hidden">{{id}}</span>{{name}}</li>
{{/each}}
</ul>
对于这个特定的视图，这部分公共区域代码失败了......
placeRenderedView: function () {
this.$el.html(this.currentView.$el);
this.currentView.delegateEvents();
if (this.currentView.postRender !== undefined && this.currentView.postRender !== null) {
this.currentView.postRender();
}
},
... this.$el.html(this.currentView.$el);行根本不做任何事情。
如果我能提供其他任何帮助，请告诉我。
答案 0 :(得分：2)
我设法解决了这个问题，在这篇文章的帮助下 - Backbone View Nesting
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，允许该区域然后正确实例化（现在回到我身边，这就是我首先创建postRender方法的原因。
这是改变后的功能......
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;
});
简单来说......
如果附加到外部标记，请确保在尝试添加使用它的子视图或区域之前呈现标记，否则您可能会哭。