我现在正在研究 Sencha Touch 2 并对可以在离线模式下使用的 Ext.data.LocalStorage 进行一些研究。
我尝试遵循这个 turorial Sencha Touch 2 Local Storage并刚刚从Github - RobK/SenchaTouch2-LocalStorageExample或riyaadmiller/LocalStorage 更新了代码, 并使用我自己的 WCF Rest 修改了 Store url 但我无法让 LocalStorage 在离线模式下工作。我没有在线运行应用程序的问题。我也尝试在 Chrome 开发者工具上调试它,但 LocalStorage 总是得到 0 数据。我使用了 Chrome/Safari 浏览器,还使用 Phonegap 构建了 Android 应用程序,但仍然无法正常工作。
我错过了什么?有没有人可以提供处理这个问题的细节。
下面是我的代码:
店铺:
Ext.define('Local.store.News', {
extend:'Ext.data.Store',
config:{
model: 'Local.model.Online',
proxy:
{
type: 'ajax',
extraParams: { //set your parameters here
LookupType: "Phone",
LookupName: ""
},
url: 'MY WCF REST URL',
headers: {
'Content-Type': 'application/json; charset=utf-8'
},
reader:
{
type: 'json'
, totalProperty: "total"
},
writer: { //Use to pass your parameters to WCF
encodeRequest: true,
type: 'json'
}
},
autoLoad: true
}
});
离线型号:
Ext.define('Local.model.Offline', {
extend: 'Ext.data.Model',
config: {
idProperty: "ID", //erm, primary key
fields: [
{ name: "ID", type: "integer" }, //need an id field else model.phantom won't work correctly
{ name: "LookupName", type: "string" },
{ name: "LookupDescription", type: "string" }
],
identifier:'uuid', // IMPORTANT, needed to avoid console warnings!
proxy: {
type: 'localstorage',
id : 'news'
}
}
});
在线模型:
Ext.define('Local.model.Online', {
extend: 'Ext.data.Model',
config: {
idProperty: "ID", //erm, primary key
fields: [
{ name: "ID", type: "integer" }, //need an id field else model.phantom won't work correctly
{ name: "Name", type: "string" },
{ name: "Description", type: "string" }
]
}
});
控制器:
Ext.define('Local.controller.Core', {
extend : 'Ext.app.Controller',
config : {
refs : {
newsList : '#newsList'
}
},
/**
* Sencha Touch always calls this function as part of the bootstrap process
*/
init : function () {
var onlineStore = Ext.getStore('News'),
localStore = Ext.create('Ext.data.Store', { storeid: "LocalNews",
model: "Local.model.Offline"
}),
me = this;
localStore.load();
/*
* When app is online, store all the records to HTML5 local storage.
* This will be used as a fallback if app is offline more
*/
onlineStore.on('refresh', function (store, records) {
// Get rid of old records, so store can be repopulated with latest details
localStore.getProxy().clear();
store.each(function(record) {
var rec = {
name : record.data.name + ' (from localStorage)' // in a real app you would not update a real field like this!
};
localStore.add(rec);
localStore.sync();
});
});
/*
* If app is offline a Proxy exception will be thrown. If that happens then use
* the fallback / local stoage store instead
*/
onlineStore.getProxy().on('exception', function () {
me.getNewsList().setStore(localStore); //rebind the view to the local store
localStore.load(); // This causes the "loading" mask to disappear
Ext.Msg.alert('Notice', 'You are in offline mode', Ext.emptyFn); //alert the user that they are in offline mode
});
}
});
看法:
Ext.define('Local.view.Main', {
extend : 'Ext.List',
config : {
id : 'newsList',
store : 'News',
disableSelection : false,
itemTpl : Ext.create('Ext.XTemplate',
'{Name}-{Description}'
),
items : {
docked : 'top',
xtype : 'titlebar',
title : 'Local Storage List'
}
}
});
谢谢并恭祝安康