iOS 文字添加上标和下标 (转载)

UILabel *lbl = [[UILabel alloc]initWithFrame:CGRectMake(10, 100, 200, 40)];

NSString *infoString=@"X2 and H20 A‡ B† C*";

NSMutableAttributedString *attString=[[NSMutableAttributedString alloc] initWithString:infoString];

[attString addAttribute:(NSString *)kCTSuperscriptAttributeName value:@1 range:NSMakeRange(1, 1)];

[attString addAttribute:(NSString *)kCTSuperscriptAttributeName value:@-1 range:NSMakeRange(8, 1)];

[attString addAttribute:(NSString *)kCTSuperscriptAttributeName value:@1 range:NSMakeRange(12, 1)];

[attString addAttribute:(NSString *)kCTSuperscriptAttributeName value:@1 range:NSMakeRange(15, 1)];

[attString addAttribute:(NSString *)kCTSuperscriptAttributeName value:@1 range:NSMakeRange(18, 1)];

lbl.attributedText = attString;

[self.view addSubview:lbl];

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原文链接：https://blog.csdn.net/yueyansheng2/article/details/15506007