UILabel UiButton 文字下面加下划线

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    NSMutableAttributedString *str = [[NSMutableAttributedString alloc] initWithString:@"直接进入"];

    NSRange strRange = {0,[str length]};

    [str addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInteger:NSUnderlineStyleSingle] range:strRange];

    [self.comingBtn setAttributedTitle:str forState:UIControlStateNormal];

//    self.comingLabel.attributedText = str;

UILabel UiButton 文字下面加下划线

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原文地址：http://www.cnblogs.com/fengkuangIT/p/4834954.html