EXT4 MVC VIEW中无法获取STORE的长度

Question

VIEW CODE:

[code="js"]

console.log(Ext.create('PersonMani.store.MenuNodes').getCount()
console.log(Ext.create('PersonMani.store.MenuNodes').data.length);

打印结果都为 0，如何才能访问到MenuNodes的长度与元素？

Ext.define('PersonMani.view.LeftMenuTree', {
extend: 'Ext.panel.Panel',
alias: 'widget.leftmenutree',

title: 'Menu',
id:'tpanel',
....
iconCls : 'icon-accordion',
layout: {
    type: 'accordion'
},

initComponent: function() {
    var me = this;
    ....
    me.callParent(arguments);
}

});

[/code]

STORE CODE:

[code="js"]
Ext.define('PersonMani.store.MenuNodes', {
extend: 'Ext.data.Store',
requires: 'PersonMani.model.MenuNode',

model: 'PersonMani.model.MenuNode',

autoLoad: true,

proxy: {
    type: 'ajax',
    api: {
        read : 'menunode/view.action'
    },
    reader: {
        type: 'json',
        root: 'data',
        successProperty: 'success',
    },
    writer: {
        type: 'json',
        writeAllFields: true,
        encode: false,
        root: 'data'
    },

    listeners: {
        exception: function(proxy, response, operation){
            Ext.MessageBox.show({
                title: 'REMOTE EXCEPTION',
                msg: operation.getError(),
                icon: Ext.MessageBox.ERROR,
                buttons: Ext.Msg.OK
            });
        }
    }
}

});

[/code]

Answer 1

首先得判断store是否加装完数据 还有要在store.load({callback:function{
这里写alert(store.getCount()) //意思是加载成功后调用显示数量
}})