Extjs4---Uncaught TypeError: Cannot call method 'substring' of undefined
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我遇到这个错误是在做MVC时遇到的,因为alias属性忘了加“widget”
Ext.define('HT.view.Center',{extend:'Ext.tab.Panel',//layout:'fit',//注意 加上widget.alias:'widget.center',activeTab:0,width:500,height:400,region:'center',items:[ { title:'主页', html:'这里是主页' },{ title:'tab2', hitml:'第二个页面' }],initComponent:function(){this.callParent(arguments);}});
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