UILable显示HTML标签 将HTML字符串转换为 NSAt

// 将HTML字符串转换为 NSAttributedString 的方法
- (NSAttributedString *)attributedStringFromHTMLString:(NSString *)htmlString {
    NSError *error = nil;
    NSAttributedString *initialAttrString = [[NSAttributedString alloc] initWithData:[htmlString dataUsingEncoding:NSUTF8StringEncoding]
                                                                         options:@{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType,
                                                                                  NSCharacterEncodingDocumentAttribute: @(NSUTF8StringEncoding)}
                                                      documentAttributes:nil
                                                                   error:&error];
    
    if (error) {
        NSLog(@"Error converting HTML to NSAttributedString: %@", error.localizedDescription);
        return nil;
    }

    NSMutableAttributedString *mutableAttrString = initialAttrString.mutableCopy;

    // 设置全局字体大小（20px）
    UIFont *font = [UIFont systemFontOfSize:14.0]; // 注意这里的20.0对应的是点数而不是像素
    [mutableAttrString addAttribute:NSFontAttributeName value:font range:NSMakeRange(0, mutableAttrString.length)];

    // 设置全局颜色为红色
    UIColor *redColor = RGB(51, 51, 51);
    [mutableAttrString addAttribute:NSForegroundColorAttributeName value:redColor range:NSMakeRange(0, mutableAttrString.length)];

    return mutableAttrString;
}