iOS - UILabel一段文字加不一樣下劃線加不一樣顏色

• 在UILabel中的一段文字上添加不一樣顏色,不一樣下劃線

注意: 若是同時給一段文字加上顏色與下劃線是沒有下劃線效果的,目前不知爲何. 例如:"hello" 給它同時加上下劃線與改變字體顏色則只能改變顏色.

- (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)];
    //加下劃線
    [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];
}

• 效果圖:
  

UIButton下劃線設置: http://www.cnblogs.com/adampei-bobo/p/6116469.html