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backbone.js – 在获取集合或模型时触发加载视图

 5 years ago
source link: https://codeday.me/bug/20190112/505264.html?amp%3Butm_medium=referral
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我一直在使用木偶一周,这让我的生活变得更轻松！

现在我需要能够在获取集合或模型时通知用户,因为某些视图需要花费大量时间来呈现/获取.举个例子,我做了一个小模型：

当用户单击某个类别时,需要加载该类别中所有项目的集合.在获取集合之前,我想显示加载视图,如图所示(视图1).实现这一目标的优雅解决方案是什么.我发现以下帖子中用户启用了获取触发器： http://tbranyen.com/post/how-to-indicate-backbone-fetch-progress .这似乎有效但不是我想要的.这是我提出的： 

var ItemThumbCollectionView = Backbone.Marionette.CollectionView.extend({
        collection: new ItemsCollection(userId),
        itemView: ItemThumbView,
        initialize: function(){
            this.collection.on("fetch", function() {
                //show loading view
            }, this);
            this.collection.on("reset", function() {
                //show final view
            }, this);
            this.collection.fetch();

            Backbone.history.navigate('user/'+identifier);
            this.bindTo(this.collection, "reset", this.render, this)
        }
    });

如果我可以有一个名为’LoadItemView’的可选属性,那就太好了.这将在获取期间覆盖itemView.在您看来这是一个很好的做法吗？


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