Ext.Ajax.on('beforerequest',function(connection,options){ Ext.getBody().mask('Loading...'); }); Ext.Ajax.on('requestcomplete',options){ Ext.getBody().unmask(); }); Ext.Ajax.on('requestexception',options){ Ext.getBody().unmask(); }); 原文链接：https://www.f2er.com/ajax/166633.html