iOS 姓名、手机号后加红色的星号*

//html字符串转换为富文本
NSString *htmlStr = @"手机号<span style='color:red'>*</span>";
            
NSAttributedString *attStr = [[NSAttributedString alloc] initWithData:[htmlStr dataUsingEncoding:NSUnicodeStringEncoding] options:@{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType} documentAttributes:nil error:nil];

phoneLabel.attributedText = attStr;