htmlStr = [NSString stringWithFormat:@"<!DOCTYPE html PUBLIC '-//WAPFORUM//DTD XHTML Mobile 1.0//EN' 'http://www.wapforum.org/DTD/xhtml-mobile10.dtd'> <html xmlns='http://www.w3.org/1999/xhtml'>"
"<head>"
"<style type=\"text/css\">"
"body {font-size:15px;}"
"</style>"
"</head>"
"<body>"
"<script type='text/javascript'>"
"window.onload = function(){"
"var $img = document.getElementsByTagName('img');"
"for(var p in $img){"
" $img[p].style.width = '90%%';"
"$img[p].style.height ='auto'"
"}"
"}"
"</script>%@"
"</body>"
"</html>",str];
self.webView.autoresizesSubviews = YES;//自动调整大小
self.webView.scalesPageToFit = YES;
self.webView.scrollView.delegate = self;
self.webView.delegate = self;
[self.webView loadHTMLString:htmlStr baseURL:nil];
注释：1)<!DOCTYPE html PUBLIC '-//WAPFORUM//DTD XHTML Mobile 1.0//EN' 'http://www.wapforum.org/DTD/xhtml-mobile10.dtd'> <html xmlns='http://www.w3.org/1999/xhtml'>"
将html代码标注为手机端使用
2)下部分代码是针对html代码里的图片做处理：" $img[p].style.width = '90%%';" ，90代表占屏幕宽度90%
3）Str，后台传来的html代码："</script>%@"
