如何檢測何時UIWebView真的完成加載時涉及重定向？

Question

取決於網址，有時多個URL可以被加載，例如，假設你的URL http://www.zagat.com/加載到一個UIWebView然後shouldStartLoadWithRequest：將網址被調用如下無數次：

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 

（通過增加獲得NSLog to shouldShartLoadWithRequest）

由於加載單個url可能會導致多個url被UIWebView加載，所以如何才能知道您最初加載的頁面實際上已完全加載完成？

我試圖注入下面的JavaScript到頁面：

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

但是，當執行傳遞給shouldStartLoadWithRequest URL的順序是：

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被傳遞tomeStLoadWithRequest作爲document.location.href更改的結果，但它不會作爲最終的url傳遞。

因此，怎樣才能知道頁面何時完全加載完成，並且不會再有更多的URL被處理？

Answer 1

我只有一個建議 - 使用一些連接類來獲取數據並將其顯示在Web視圖中。好處是您可以完全控制連接，例如您可以跟蹤響應代碼3xx並知道發生了重定向。不幸的是，切斷了一些文檔（如MS Office文件）的簡單支持，並且您可能無法完成許多額外的工作。作爲捷徑，您可以嘗試使用已重定向支持聲明的GDataHTTPFetcher。

基本上，據我所知，HTTP重定向的響應的狀態代碼200意味着你在重定向路線的末尾，但沒有其他方式我知道獲得響應狀態碼。