点赞动画的效果

    [self.button1setImage:[UIImageimageNamed:(i%2==0?@"2":@"1")]forState:UIControlStateNormal];

    

    

    self.image1.layer.contents = (id)[UIImageimageNamed:(i%2==0?@"2":@"1")].CGImage;

    CAKeyframeAnimation *k = [CAKeyframeAnimationanimationWithKeyPath:@"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.button1.layeraddAnimation:kforKey:@"SHOW"];

    [self.image1.layeraddAnimation:kforKey:@"SHOW"];

http://www.cnblogs.com/wengzilin/p/4256468.html

这是CAKeyframeAnimation动画的详解

http://www.cnblogs.com/wengzilin/p/4250957.html

对于动画比较全面的总结，