ios 修改webView字体

 UIFont *font = [UIFont systemFontOfSize:12];
    
    //方法一
    NSString *fontColor =@"CCCCFF";
    NSString *htmlString =[NSString stringWithFormat:@"<html> 
"
                        "<head> 
"
                        "<style type="text/css"> 
"
                        "body {font-family: "%@"; color: %@;}
"
                        "</style> 
"
                        "</head> 
"
                        "<body>%@</body> 
"
                        "</html>", font.familyName,fontColor,self.html];
    //方法二
   NSString* htmlString = [NSString stringWithFormat:@"<span style="font-family: %@!important; font-size: %i">%@</span>",
                  font.fontName,
                  (int) font.pointSize,
                  self.html];
    //方法三
    NSString *htmlString = [NSString stringWithFormat:@"<font face='%@' >%@", font.fontName,self.html];
    
   //以上三种方法都需 提起获取到 html,然后用下面方法加载html
    [self loadHTMLString:htmlString baseURL:DDWebBaseURL];

//方法4 也可以在webview中代理方法中修改  这种方法体验不好 
- (void)webViewDidFinishLoad:(UIWebView *)webView {
      UIFont *font = [UIFont systemFontOfSize:14];        
      NSString *script = [NSString stringWithFormat:@"document.body.style.fontFamily = '%@'",font.familyName];
     [webView stringByEvaluatingJavaScriptFromString:script];

}
//通过修改DOM,修改特定节点的样式

NSString *script1 = @"document.getElementsByClassName('component-item component-content')[0].getElementsByTagName('p')[0].style.fontSize='30px'";

NSString *script = @"document.getElementsByClassName('component-item component-content')[0].getElementsByTagName('p')[0].style.fontFamily='DFWaWaW5'";

NSString *html341 =[webView stringByEvaluatingJavaScriptFromString:script1];

NSString *html34 =[webView stringByEvaluatingJavaScriptFromString:script];