iOS 显示html标签富文本

NSAttributedString *attributedString = [[NSAttributedString alloc] initWithData:[@"<span style=\"color:#333333;font-size:14px;font-family:ArialMT\">Gradually add the </span><span style=\"color:#ff8a00;font-size:14px;font-family:ArialMT\">olive oil 哈哈哈哈哈哈哈哈哈哈</span> <span style=\"color:#333333;font-size:14px;font-family:ArialMT\"> while running the blender slowly.</span>" dataUsingEncoding:NSUnicodeStringEncoding] options:@{ NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType } documentAttributes:nil error:nil];