ios webview 文章缩放
NSString *htmls = [NSString stringWithFormat:@"<html> \n"
"<head> \n"
"<meta name=\"viewport\" content=\"width=device-width,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no\" /> \n"
"<style type=\"text/css\"> \n"
"body {font-size:15px;}\n"
"p {text-indent: 2em;line-height:50px}\n"
"</style> \n"
"</head> \n"
"<body>"
"<script type='text/javascript'>"
"window.onload = function(){\n"
"var $img = document.getElementsByTagName('img');\n"
"for(var p in $img){\n"
"$img[p].style.width = '100%%';\n"
"$img[p].style.height ='auto'\n"
"}\n"
"}"
"</script>%@"
"</body>"
"</html>",string];
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