关于Backbone.localstorage.js怎么存取 _JavaScript

关于Backbone.localstorage.js如何存取

由于lz是从Sencha Touch转而开始原生Html5开发的，因此对于ST的MVC框架格外的喜欢那种将数据封装到store的做法，而backbone也借鉴了这种做法，因此我们可以使用backbone来实现sencha的那种model-store-view的做法，而这些数据都是存在于localstorage的，只要不要代码或者插件是无法清除的。

前提条件按照todo 的example配有backbone的框架以及引用backbone.localstorage.js

要实现存取首先我们在backbones来定义一个Model――InfoImg.js

define(function(require, exports, module){
    var Backbone = require('backbone');
    var InfoImg = Backbone.Model.extend({

        // Default attributes for the todo item.
        defaults: function() {
            return {
                Id: "0",
                Created_at: (new Date()).format("yyyy-MM-dd hh:mm:ss"),
                Retweeted_status: "resources/images/nodata.png",
                Text:"亲，暂时没有数据哦",
                Name:"CF西西工作室",
                UserId:"-1"
            };
        },

        // Ensure that each todo created has `title`.
        initialize: function() {
            if (!this.get("Id")) {
                this.set({"Id": this.defaults().Id});
            }

            if (!this.get("Created_at")) {
                this.set({"Created_at": this.defaults().Created_at});
            }

            if (!this.get("Retweeted_status")) {
                this.set({"Retweeted_status": this.defaults().Retweeted_status});
            }

            if (!this.get("Text")) {
                this.set({"Text": this.defaults().Text});
            }

            if (!this.get("Name")) {
                this.set({"Name": this.defaults().Name});
            }

            if (!this.get("UserId")) {
                this.set({"UserId": this.defaults().UserId});
            }

        }

    });

    module.exports = InfoImg;
});

其次我们定义一个collection（store）――InfoImgStore.js

/**
 * Created with JetBrains WebStorm.
 * User: ChenFeng
 * Date: 13-4-27
 * Time: 下午2:28
 * To change this template use File | Settings | File Templates.
 */

define(function(require, exports, module){
    var Backbone, InfoImg;

    Backbone = require('backbone');
    require('../libs/backbone.localStorage');

    var $ = require('jquery');
    var _ = require('underscore');

    InfoImg = require('../model/InfoImg');


    var InfoImgStore = Backbone.Collection.extend({

        // Reference to this collection's model.
        model: InfoImg,

        // Save all of the todo items under the `"todos-backbone"` namespace.
        localStorage: new Backbone.LocalStorage("cfxixi-XiXiInfo-Img"),

        // Filter down the list of all todo items that are finished.
        done: function() {
            return this.filter(function(todo){ return todo.get('Id'); });
        },

        // Filter down the list to only todo items that are still not finished.
        remaining: function() {
            return this.without.apply(this, this.done());
        }

    });

    module.exports = new InfoImgStore();
})

然后就是在框架中调用了：

调用时需要引用:

var weiboStore = require('../store/InfoImgStore')

存数据时用法：

weiboStore.create({id:imgId,Created_at:imgCreated_at,Retweeted_status:imgUrl,
                    Text:imgText,Name:imgName,UserId:userId});

取数据时：

weiboStore.localStorage.find({id:'3628622776303138'});

取出全部时：

weiboStore.localStorage.find({id:'3628622776303138'});

如此就便能实现对localstorge的轻松操作了