ios 抛物线添加到购物车

  // 抛物线关键帧动画
    CAKeyframeAnimation *keyframeAnimation=[CAKeyframeAnimation animationWithKeyPath:@"position"];
    CGMutablePathRef path = CGPathCreateMutable();
    CGPathMoveToPoint(path, NULL, layer.position.x, layer.position.y);//移动到起始点
    CGPathAddQuadCurveToPoint(path, NULL, 100, 100, endPosition.x, endPosition.y);
    keyframeAnimation.path = path;
    keyframeAnimation.delegate = self;
    CGPathRelease(path);
    keyframeAnimation.duration = kAnimationDuration;
    [layer addAnimation:keyframeAnimation forKey:@"KCKeyframeAnimation_Position"];