如何创建自定义计时功能？

Question

我正忙于UIViewControllers之间的自定义动画过渡，我喜欢UIView跳转，然后填充类似于以下屏幕截图的空间：

现在没有“选项”我可以创造这样的效果。现在我可以创建一个关键帧动画，顶部有一个键，中间有一个键但是感觉不自然，它会感觉机器人。

如何处理这个？

消息来源（SO FAR）

- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext
{
    UIViewController    *fromVC    = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
    UIViewController    *toVC      = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
    UIView              *container = [transitionContext containerView];

    if ([fromVC isEqual:self])
    {
        [_activeCardView.superview bringSubviewToFront:_activeCardView];

        [UIView animateKeyframesWithDuration:[self transitionDuration:transitionContext]
                                       delay:0.0
                                     options:UIViewKeyframeAnimationOptionCalculationModeCubic
                                  animations:^{
                                      [_activeCardView setFrame:CGRectMake(0.0, 0.0, toVC.view.bounds.size.width, toVC.view.bounds.size.height)];
                                  }
                                  completion:^(BOOL finished){
                                      [container addSubview:toVC.view];
                                      [transitionContext completeTransition:YES];
                                  }];
    }
    else
    {
        [container addSubview:toVC.view];

        [UIView animateWithDuration:[self transitionDuration:transitionContext]
                         animations:^{
                             [_activeCardView setFrame:_basicCardFrame];
                         }
                         completion:^(BOOL finished){
                             [transitionContext completeTransition:YES];
                         }];
    }
}

Answer 1

顺利跳跃＆＃39;动画，您可以使用＆＃39; EaseInOut＆＃39;链接两个动画。曲线。

[UIView animateWithDuration:<DURATION>/2 delay:<DELAY> options:UIViewAnimationOptionCurveEaseInOut animations:^(void) {
        //move view up
    }completion:^(BOOL finished) {
        [UIView animateWithDuration:<DURATION>/2 delay:<DELAY> options:UIViewAnimationOptionCurveEaseInOut animations:^(void) {
            //move view down
        }completion:NULL];
    }];