上拉、下拉UITableView，交互式 模态弹出（自定义弹出卡通片）

- (instancetype)initWithPresentingController:(UITableViewController *)presentingVc presentedController:(UIViewController *)presentedVc {    self = [super init];    if (self) {        self.vc = presentedVc;        self.vc.transitioningDelegate =self;        self.presentingVc = presentingVc;    }    return self;}- (void)new_scrollViewWillBeginDragging:(UIScrollView *)scrollView {    self.interactiveTransition = [[UIPercentDrivenInteractiveTransition alloc]init];    [self.presentingVc presentViewController:self.vc animated:YES completion:nil];}- (void)new_scrollViewDidScroll:(UIScrollView *)scrollView {        CGFloat offsetY = fabs(scrollView.contentOffset.y);        CGFloat screenH = [UIScreen mainScreen].bounds.size.height / 3.0;    progress = offsetY / screenH;    progress = progress-0.3;    if (progress > 0) {        [self.interactiveTransition updateInteractiveTransition:progress];    }    }- (void)new_scrollViewWillEndDragging {    if (progress < 0.4) {        [self.interactiveTransition cancelInteractiveTransition];    }else {        [self.interactiveTransition finishInteractiveTransition];    }    self.interactiveTransition = nil;}- (nullable id <UIViewControllerAnimatedTransitioning>)animationControllerForPresentedController:(UIViewController *)presented presentingController:(UIViewController *)presenting sourceController:(UIViewController *)source {        return self.animation;}- (id<UIViewControllerInteractiveTransitioning>)interactionControllerForPresentation:(id<UIViewControllerAnimatedTransitioning>)animator {        return self.interactiveTransition;}

- (NSTimeInterval)transitionDuration:(id<UIViewControllerContextTransitioning>)transitionContext {    return 1.0;}- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext {        UIView *toView = [transitionContext viewForKey:UITransitionContextToViewKey];    UIView *containerView = [transitionContext containerView];    [containerView addSubview:toView];        toView.frame = CGRectMake(50, containerView.bounds.size.height, containerView.bounds.size.width - 100, containerView.bounds.size.height - 300);        [UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{        toView.frame = containerView.bounds;    }completion:^(BOOL finished) {        [transitionContext completeTransition:![transitionContext transitionWasCancelled]];    }];    }

- (InteractiveTransition *)interactive {    if (!_interactive) {        _interactive = [[InteractiveTransition alloc]initWithPresentingController:self presentedController:[[TwoViewController alloc]init]];    }    return _interactive;}- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {        [self.interactive new_scrollViewWillBeginDragging:scrollView];}- (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset {        [self.interactive new_scrollViewWillEndDragging];}- (void)scrollViewDidScroll:(UIScrollView *)scrollView {        [self.interactive new_scrollViewDidScroll:scrollView];}