如何检测何时UIWebView真的完成加载时涉及重定向？

Question

取决于网址，有时多个URL可以被加载，例如，假设你的URL http://www.zagat.com/加载到一个UIWebView然后shouldStartLoadWithRequest：将网址被调用如下无数次：

http://www.zagat.com/ 
http://pixel.fetchback.com/serve/fb/pdj?cat=&name=landing&sid=3997 
https://m.google.com/app/plus/poswidget/?hl=en-US&jsh=m%3B%2F_%2Fapps-static%2F_%2Fjs%2Fgapi%2F__features__%2Frt%3Dj%2Fver%3Dt_fRXLZrGUk.en_US.%2Fsv%3D1%2Fam%3D!wJ3zzZyr7MyIPjLesA%2Fd%3D1#url=http%3A%2F%2Fwww.zagat.com%2F&size=small&count=true&id=I1_1331701330274&parent=http%3A%2F%2Fwww.zagat.com&rpctoken=375018132&_methods=onPlusOne%2C_ready%2C_close%2C_open%2C_resizeMe%2C_renderstart 

http://pixel.fetchback.com/serve/fb/blank 
https://www.googleapis.com/static/proxy.html?jsh=m%3B%2F_%2Fapps-static%2F_%2Fjs%2Fgapi%2F__features__%2Frt%3Dj%2Fver%3Dt_fRXLZrGUk.en_US.%2Fsv%3D1%2Fam%3D!wJ3zzZyr7MyIPjLesA%2Fd%3D1#parent=https%3A%2F%2Fm.google.com&rpctoken=809526044 
https://m.google.com/app/plus/poswidget/?hl=en-US&jsh=m%3B%2F_%2Fapps-static%2F_%2Fjs%2Fgapi%2F__features__%2Frt%3Dj%2Fver%3Dt_fRXLZrGUk.en_US.%2Fsv%3D1%2Fam%3D!wJ3zzZyr7MyIPjLesA%2Fd%3D1&jsh=m%3B%2F_%2Fapps-static%2F_%2Fjs%2Fgapi%2F__features__%2Frt%3Dj%2Fver%3Dt_fRXLZrGUk.en_US.%2Fsv%3D1%2Fam%3D!wJ3zzZyr7MyIPjLesA%2Fd%3D1#bub=1&url=http://www.zagat.com/&id=I2_1331701333045&parent=http%3A%2F%2Fwww.zagat.com&rpctoken=257947967&_methods=_onopen%2C_ready%2C_onclose%2C_close%2C_open%2C_resizeMe%2C_renderstart 

（通过增加获得NSLog to shouldShartLoadWithRequest）

由于加载单个url可能会导致多个url被UIWebView加载，所以如何才能知道您最初加载的页面实际上已完全加载完成？

我试图注入下面的JavaScript到页面：

var script = document.createElement('script'); 
script.type = 'text/javascript'; 
script.text = window.onload = function DOMHasLoaded() { 
document.location.href = "mydomain://anything.stuff"; 
}; 

但是，当执行传递给shouldStartLoadWithRequest URL的顺序是：

http://www.zagat.com/ 
http://pixel.fetchback.com/serve/fb/pdj?cat=&name=landing&sid=3997 
http://pixel.fetchback.com/serve/fb/blank 
https://m.google.com/app/plus/poswidget/?hl=en-US&jsh=m%3B%2F_%2Fapps-static%2F_%2Fjs%2Fgapi%2F__features__%2Frt%3Dj%2Fver%3Dt_fRXLZrGUk.en_US.%2Fsv%3D1%2Fam%3D!wJ3zzZyr7MyIPjLesA%2Fd%3D1#url=http%3A%2F%2Fwww.zagat.com%2F&size=small&count=true&id=I1_1331701452309&parent=http%3A%2F%2Fwww.zagat.com&rpctoken=248478838&_methods=onPlusOne%2C_ready%2C_close%2C_open%2C_resizeMe%2C_renderstart 
https://www.googleapis.com/static/proxy.html?jsh=m%3B%2F_%2Fapps-static%2F_%2Fjs%2Fgapi%2F__features__%2Frt%3Dj%2Fver%3Dt_fRXLZrGUk.en_US.%2Fsv%3D1%2Fam%3D!wJ3zzZyr7MyIPjLesA%2Fd%3D1#parent=https%3A%2F%2Fm.google.com&rpctoken=230813838 
mydomain://anything.stuff 
https://m.google.com/app/plus/poswidget/?hl=en-US&jsh=m%3B%2F_%2Fapps-static%2F_%2Fjs%2Fgapi%2F__features__%2Frt%3Dj%2Fver%3Dt_fRXLZrGUk.en_US.%2Fsv%3D1%2Fam%3D!wJ3zzZyr7MyIPjLesA%2Fd%3D1&jsh=m%3B%2F_%2Fapps-static%2F_%2Fjs%2Fgapi%2F__features__%2Frt%3Dj%2Fver%3Dt_fRXLZrGUk.en_US.%2Fsv%3D1%2Fam%3D!wJ3zzZyr7MyIPjLesA%2Fd%3D1#bub=1&url=http://www.zagat.com/&id=I2_1331701453238&parent=http%3A%2F%2Fwww 

即MYDOMAIN：//anything.stuff被传递tomeStLoadWithRequest作为document.location.href更改的结果，但它不会作为最终的url传递。

因此，怎样才能知道页面何时完全加载完成，并且不会再有更多的URL被处理？

Answer 1

我只有一个建议 - 使用一些连接类来获取数据并将其显示在Web视图中。好处是您可以完全控制连接，例如您可以跟踪响应代码3xx并知道发生了重定向。不幸的是，切断了一些文档（如MS Office文件）的简单支持，并且您可能无法完成许多额外的工作。作为捷径，您可以尝试使用已重定向支持声明的GDataHTTPFetcher。

基本上，据我所知，HTTP重定向的响应的状态代码200意味着你在重定向路线的末尾，但没有其他方式我知道获得响应状态码。