// 數字跳動動畫- (void)labelDanceAnimation:(NSTimeInterval)duration { //透明度 CABasicAnimation *opacityAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"]; opacityAnimation.duration = 0.4 * duration; opacityAnimation.fromValue = @0.f; opacityAnimation.toValue = @1.f; //縮放 CAKeyframeAnimation *scaleAnimation = [CAKeyframeAnimation animationWithKeyPath:@"transform.scale"]; scaleAnimation.duration = duration; scaleAnimation.values = @[@3.f, @1.f, @1.2f, @1.f]; scaleAnimation.keyTimes = @[@0.f, @0.16f, @0.28f, @0.4f]; scaleAnimation.removedOnCompletion = YES; scaleAnimation.fillMode = kCAFillModeForwards; CAAnimationGroup *animationGroup = [CAAnimationGroup animation]; animationGroup.animations = @[opacityAnimation, scaleAnimation]; animationGroup.duration = duration; animationGroup.removedOnCompletion = YES; animationGroup.fillMode = kCAFillModeForwards; [self.comboLabel.layer addAnimation:animationGroup forKey:@"kComboAnimationKey"];}

self.comboLabel.font = [UIFont fontWithName:@"AvenirNext-BoldItalic" size:50];

- (IBAction)clickAction:(UIButton *)sender { self.danceCount++; [self labelDanceAnimation:0.4]; self.comboLabel.text = [NSString stringWithFormat:@"+ %tu",self.danceCount];}