UIWebView截取html

//載取html改變頁面寬度後塞回
- (void)webViewDidFinishLoad:(UIWebView *)webView

{

//修改頁面meta值

NSString *meta = [NSString stringWithFormat:@"document.getElementsByName(\"viewport\")[0].content = \"width=%f, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no\"", webView.frame.size.width];

[webView stringByEvaluatingJavaScriptFromString:meta];

}

//增加UTF-8編碼

 [webView stringByEvaluatingJavaScriptFromString:  @"var tagHead =document.documentElement.firstChild;" 
"var tagMeta = document.createElement(\"meta\");"
"tagMeta.setAttribute(\"http-equiv\", \"Content-Type\");"   "tagMeta.setAttribute(\"content\", \"text/html; charset=utf-8\");"
"var tagHeadAdd = tagHead.appendChild(tagMeta);"]; 

//截取網頁圖片,修改圖片大小

[webView stringByEvaluatingJavaScriptFromString:

@"var script = document.createElement('script');"

"script.type = 'text/javascript';"

"script.text = \"function ResizeImages() { "

"var myimg,oldwidth;"

"var maxwidth=380;" //頁面寬度

"for(i=0;i <document.images.length;i++){"

"myimg = document.images[i];"

"if(myimg.width > maxwidth){"

"oldwidth = myimg.width;"

"myimg.width = maxwidth;"

"myimg.height = myimg.height * (maxwidth/oldwidth);"

"}"

"}"

"}\";"

"document.getElementsByTagName('head')[0].appendChild(script);"];

 

[webView stringByEvaluatingJavaScriptFromString:@"ResizeImages();"];