iOS UIWebView加载HTML标签 适配字体,图片和文字大小

/**
 HTML 适配图片文字

 @param htmlStr <#htmlStr description#>
 @return <#return value description#>
 */
- (NSString *)getHtmlString:(NSString *)htmlStr
{
    NSMutableString * html = [NSMutableString string];
    
    [html appendString:@""];
    [html appendString:@""];
    [html appendString : @"" ];
    
    [html appendString : @"" ];
        [html appendString : @"" ];
    [html appendString : @"" ];
    [html appendString : @"" ];
    
    //适配图片宽度，如果图片宽度超过手机屏幕宽度，就让图片宽度等于手机屏幕宽度，高度自适应，如果图片宽度小于屏幕宽度，就显示图片大小
    [html appendString : @"\n"];
    [html appendString : @"" ];
    
    [html appendString:@""];
    [html appendString:@""];
    [html appendString:htmlStr];
    [html appendString:@"
"];
    [html appendString:@"
"];
    
    [html appendString:@""];
    [html appendString:@""];
    
    return html;
}