mui.openWindow 打开网络连接时候，返回按钮报错

mui.openWindowWithTitle
ws.appendJsFile('_www/js/mui.min.js') 或者 ws.setJsFile('_www/js/mui.min.js');

当点击titlebar 上的返回按钮时， IOS 环境报以下错误，Andriod 正常
[ERROR] : TypeError: mui.back is not a function. (In 'mui.back()', 'mui.back' is undefined) at http://baijiahao.baidu.com/s?id=1556484095761567&wfr=spider&for=pc:1

mui.openWindow ( { url=‘http://baijiahao.baidu.com/s?id=1556484095761567&wfr=spider&for=pc:1’ ， styles：{ titleNView {...} } }) ；
ws.appendJsFile('_www/js/mui.min.js') 或者 ws.setJsFile('_www/js/mui.min.js');
当点击titlebar 上的返回按钮时， IOS 环境报以下错误，Andriod 正常

[ERROR] : TypeError: mui.receive is not a function. (In 'mui.receive('preload','')', 'mui.receive' is undefined) at http://baijiahao.baidu.com/s?id=1556484095761567&wfr=spider&for=pc:1

[ERROR] : TypeError: mui.receive is not a function. (In 'mui.receive('pagebeforeshow','')', 'mui.receive' is undefined) at http://baijiahao.baidu.com/s?id=1556484095761567&wfr=spider&for=pc:1