iOS webview加载HTML字符串，图片及文字自适应

直接上代码

NSString *content = [content stringByReplacingOccurrencesOfString:@"&amp;quot" withString:@"'"];
    content = [content stringByReplacingOccurrencesOfString:@"&lt;" withString:@"<"];
    content = [content stringByReplacingOccurrencesOfString:@"&gt;" withString:@">"];
    content = [content stringByReplacingOccurrencesOfString:@"&quot;" withString:@"\""];
    
    NSString *htmls = [NSString stringWithFormat:@"<html> \n"
                       "<head> \n"
                       "<meta name=\"viewport\" content=\"initial-scale=1.0, maximum-scale=1.0, user-scalable=no\" /> \n"
                       "<style type=\"text/css\"> \n"
                       "body {font-size:15px;}\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>",content];
    
    
    [_webView loadHTMLString:htmls baseURL:nil];

处理HTMLString的原理：

原理就是用一个for循环，拿到所有的图片，对每个图片都处理一次，让图片的宽为100%，就是按照屏幕宽度自适应；让图片的高atuo，自动适应。文字的字体大小，可以去改font-size:15px，这里我用的是15px。根据自己的具体需求去改吧。

- (NSString *)htmlEntityDecode:(NSString *)string
{
    string = [string stringByReplacingOccurrencesOfString:@"&quot;" withString:@"\""];
    string = [string stringByReplacingOccurrencesOfString:@"&apos;" withString:@"'"];
    string = [string stringByReplacingOccurrencesOfString:@"&lt;" withString:@"<"];
    string = [string stringByReplacingOccurrencesOfString:@"&gt;" withString:@">"];
    string = [string stringByReplacingOccurrencesOfString:@"&amp;" withString:@"&"]; // Do this last so that, e.g. @"&amp;lt;" goes to @"&lt;" not @"<"

    return string;
}