iOS UILabel 富文本显示HTML代码

UILable显示

    NSString *str = @"<p>hello</p>   <p>i am a demo</p>";

    NSAttributedString * attrStr = [[NSAttributedString alloc] initWithData:[str dataUsingEncoding:NSUnicodeStringEncoding] options:@{ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType } documentAttributes:nil error:nil];
    _titleLab.attributedText = attrStr;

网络解析后有一个HTML字符串需要在label显示（一般是要求显示的内容有颜色字体背景颜色的变化）如果不做处理显示的就是HTML代码内容处理方法如下原文链接

已知网络请求得到一个HTML 字符串 self.HTMLstring  
1.富文本显示 不考虑高度自适应  
 NSMutableAttributedString *str=  [[NSMutableAttributedString alloc] initWithData:[self.HTMLstring dataUsingEncoding:NSUnicodeStringEncoding] options:@{NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType} documentAttributes:nil error:nil];  
 [str addAttribute:NSFontAttributeName value:[UIFont boldSystemFontOfSize:17.0] range:NSMakeRange(0, str.length)];  
 synthesizeCell.nameLabel.attributedText =  str;  
  
2.富文本label的高度自适应  

 NSMutableAttributedString *str=  [[NSMutableAttributedString alloc] initWithData:[self.HTMLstring dataUsingEncoding:NSUnicodeStringEncoding] options:@{NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType} documentAttributes:nil error:nil];  
[str addAttribute:NSFontAttributeName value:[UIFont boldSystemFontOfSize:14] range:NSMakeRange(0, str.length)];(字体font是自定义的 要求和要显示的label设置的font一定要相同)  
CGRect rect = [self.contentLabel.attributedText boundingRectWithSize:CGSizeMake(WIDTH - 330 *FITWIDTH, 0) options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading context:nil];  
self.contentLabel.frame = CGRectMake(115 *FITWIDTH, 110 *FITWIDTH, WIDTH - 330 *FITWIDTH, rect.size.height);  
self.contentLabel.attributedText =  str;

网页显示
NSString *str = @"<p>hello</p> <p>i am a demo</p>";

UIWebView *webView = [[UIWebView alloc] initWithFrame:self.view.bonus];
[self.view addSubview:webView];
[webView loadHTMLString:str baseURL:nil];

iOS UILabel 富文本显示HTML代码

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