需求:混合應用UIWebView打開html後,UIWebView有左右滾動條,要去掉左右滾動效果;
方法:經過js截獲UIWebView中的html,而後修改html標籤內容;
實例代碼:
服務器端htmljavascript
<html><head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"> <title>網曝四川省一考場時鐘慢半小時 老師稱這就是命</title></head<body>網曝四川省一考場時鐘慢半小時 老師稱這就是命</body></html>
這樣顯示的結果網頁的最小寬度會是device-width;但有時候不須要這個寬度,就須要修改width=device-width爲width=myWidth;
客戶端代碼css
- (void)webViewDidFinishLoad:(UIWebView *)webView { //修改服務器頁面的meta的值 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]; }
這樣問題就能夠解決了
新增代碼: html
//給網頁增長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);"]; //給網頁增長css樣式 [webView stringByEvaluatingJavaScriptFromString: @"var tagHead =document.documentElement.firstChild;" "var tagStyle = document.createElement(\"style\");" "tagStyle.setAttribute(\"type\", \"text/css\");" "tagStyle.appendChild(document.createTextNode(\"BODY{padding: 20pt 15pt}\"));" "var tagHeadAdd = tagHead.appendChild(tagStyle);"]; //攔截網頁圖片 並修改圖片大小 [webView stringByEvaluatingJavaScriptFromString: @"var script = document.createElement('script');" "script.type = 'text/javascript';" "script.text = \"function ResizeImages() { " "var myimg,oldwidth;" "var maxwidth=380;" //縮放係數 "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();"];
- (void)webViewDidFinishLoad:(UIWebView *)webView { NSString *headerStr = @"document.getElementsByTagName('h1')[0].innerText = '測試文字';"; [webView stringByEvaluatingJavaScriptFromString:headerStr]; NSString *downLoadStr = @"document.getElementById('xiazaiapp').getElementsByTagName('a')[0].innerText = '下個雞蛋';"; [webView stringByEvaluatingJavaScriptFromString:downLoadStr]; }
其餘html屬性重載和此方法相似;
參考網址:
(stringByEvaluatingJavaScriptFromString的使用方法)http://www.uml.org.cn/mobiledev/201108181.asp
( iphone 獲取UIWebView內Html方法)http://blog.csdn.net/diyagoanyhacker/article/details/6564897
(IOS UIWebView引用外部CSS樣式)http://hi.baidu.com/jwq359699768/item/780879e5c98bfb3e4ddcaf22
http://blog.csdn.net/xdonx/article/details/6973521java