iOS - UILabel一段文字加不同下划线加不同颜色

• 在UILabel中的一段文字上添加不同颜色,不同下划线

注意: 如果同时给一段文字加上颜色与下划线是没有下划线效果的,目前不知为什么. 例如:"hello" 给它同时加上下划线与改变字体颜色则只能改变颜色.

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    NSMutableAttributedString *str = [[NSMutableAttributedString alloc] initWithString:@"Using NSAttributed String"];
    [str addAttribute:NSForegroundColorAttributeName value:[UIColor blueColor] range:NSMakeRange(0,5)];
    [str addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(6,12)];
    [str addAttribute:NSForegroundColorAttributeName value:[UIColor greenColor] range:NSMakeRange(19,6)];
            
    [str  addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"Arial-BoldItalicMT"size:30.0] range:NSMakeRange(0, 5)];
            
    [str addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"HelveticaNeue-Bold"size:30.0] range:NSMakeRange(6, 12)];
            
    [str addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"Courier-BoldOblique"size:30.0] range:NSMakeRange(19, 6)];
    //加下划线
    [str addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInteger:NSUnderlineStyleSingle] range:NSMakeRange(0, 3)];
    
    UILabel * lbl = [[UILabel alloc] initWithFrame:CGRectMake(0, 100, 320, 50)];
    lbl.userInteractionEnabled = YES;
    [self.view addSubview:lbl];
    lbl.attributedText = str;
    
    UITapGestureRecognizer * tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(clickStr)];
    [lbl addGestureRecognizer:tap];
}

• 效果图:
  

UIButton下划线设置: http://www.cnblogs.com/adampei-bobo/p/6116469.html