它使用window.navigator.userAgent和window.navigator.standalone的组合.它可以区分与iOS网络应用相关的所有四种状态:Safari(浏览器)、独立(全屏)、uiwebview和非iOS.
演示:http://jsfiddle.net/ThinkingStiff/6qrbn/
var standalone = window.navigator.standalone,
userAgent = window.navigator.userAgent.toLowerCase(),
safari = /safari/.test( userAgent ),
ios = /iphone|ipod|ipad/.test( userAgent );
if( ios ) {
if ( !standalone && safari ) {
//browser
} else if ( standalone && !safari ) {
//standalone
} else if ( !standalone && !safari ) {
//uiwebview
};
} else {
//not iOS
};