js获取iPhone 微信， qq ，uc， 的页面屏幕的高度

 Safari

alert(document.body.clientHeight);//460

alert(document.body.offsetHeight);//460

alert(document.body.scrollHeight);//460

alert(window.innerHeight);//460

    chrome(chrome是没有底部工具条的)

alert(document.body.clientHeight);//504

alert(document.body.offsetHeight);//504

alert(document.body.scrollHeight);//504

alert(window.innerHeight);//504

    UC

alert(document.body.clientHeight);//504

alert(document.body.offsetHeight);//504

alert(document.body.scrollHeight);//504

alert(window.innerHeight);//460

    QQ

alert(document.body.clientHeight);//500

alert(document.body.offsetHeight);//500

alert(document.body.scrollHeight);//500

alert(window.innerHeight);//452

    微信内部(也是是没有底部工具条的)

alert(document.body.clientHeight);//504

alert(document.body.offsetHeight);//504

alert(document.body.scrollHeight);//504

alert(window.innerHeight);//504