iOS--点赞动画效果
int i = 0; [self.button setImage:[UIImage imageNamed:(i%2==0?@"2":@"1")] forState:UIControlStateNormal]; CAKeyframeAnimation *k = [CAKeyframeAnimation animationWithKeyPath:@"transform.scale"]; k.values = @[@(0.1),@(1.0),@(1.5)]; k.keyTimes = @[@(0.0),@(0.5),@(0.8),@(1.0)]; k.calculationMode = kCAAnimationLinear; i++; [self.button.layer addAnimation:k forKey:@"SHOW"];