小编alo*_*uve的帖子

我使用此代码在标签中显示下标和上标但它不起作用.

我创建了一个类别NSAttributedString.

-(void)setSuperscript:(BOOL)isSuperscript range:(NSRange)range {
    [self removeAttribute:(NSString * )kCTSuperscriptAttributeName range:range]; // Work around for Apple leak
    [self addAttribute:(NSString*)kCTSuperscriptAttributeName value:[NSNumber numberWithInt:(isSuperscript?1:0)] range:range];
}
-(void)setSubscript:(BOOL)isSubscript range:(NSRange)range {
    [self removeAttribute:(NSString * )kCTSuperscriptAttributeName range:range]; // Work around for Apple leak
    [self addAttribute:(NSString*)kCTSuperscriptAttributeName value:[NSNumber numberWithInt:(isSubscript?-1:0)] range:range];
}