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目的：实现父级滚动到特定点。冻结它的滚动并让子视图滚动到底部。再次向上移动，让子视图控制器滚动，直到它到达它的顶部，然后让父视图滚动直到它到达顶部并且页面进入原始状态。

我正在添加任何这样的 childviewcontroller：

- (void)switchCurrentControllerWith:(UIViewController*)viewController andViewHeight:(float)height{

//1. The current controller is going to be removed
[selectedViewController willMoveToParentViewController:nil];
//    ((DRBaseViewController *)viewController).hideNavBar = YES;

//2. The new controller is a new child of the container
[self addChildViewController:viewController];

//3. Setup the new controller's frame depending on the animation you want to obtain
viewController.view.frame = containerRect;

//The transition automatically removes the old view from the superview and attaches the new controller's view as child of the
//container controller's view

[self transitionFromViewController:selectedViewController
                  toViewController:viewController
                          duration:0.1
                           options:UIViewAnimationOptionShowHideTransitionViews|UIViewAnimationOptionTransitionCrossDissolve
                        animations:^{


                        } completion:^(BOOL finished) {
                            //Remove the old view controller
                            [selectedViewController removeFromParentViewController];

                            //Set the new view controller as current
                            selectedViewController = viewController;
                            [selectedViewController didMoveToParentViewController:self];
                            [self.view bringSubviewToFront:navigationBar];

                             [self.scrollView setContentSize:CGSizeMake(320., CGRectGetMaxY(segmentedControl.frame) + height)];
                        }];
}

现在，有一个 UIScrollView 缩放以适应父视图控制器中的视图高度（504）。我在滚动视图委托方法中执行以下任务，以禁用父滚动视图并启用子视图控制器的滚动视图/表格视图的滚动：-(void)scrollViewDidScroll:(UIScrollView*)scrollView {

if (scrollView.contentOffset.y >= self.segmentScrollView.frame.origin.y) {
    scrollView.scrollEnabled = NO;
    for (UIViewController *selectedViewController in containedControllers) {
        for (UIView *view in selectedViewController.view.subviews) {
            if ([view isKindOfClass:[UITableView class]]) {
                UITableView *tableView = (UITableView*)view;
                tableView.scrollEnabled = YES;
            }
            else if ([view isKindOfClass:[UIScrollView class]]){
                UIScrollView *scrollView = (UIScrollView *)view;
                scrollView.scrollEnabled = YES;
            }
        }
    }

}
else{
    for (UIViewController *selectedViewController in containedControllers) {
        for (UIView *view in selectedViewController.view.subviews) {
            if ([view isKindOfClass:[UITableView class]]) {
                UITableView *tableView = (UITableView*)view;
                tableView.scrollEnabled = NO;
            }
            else if ([view isKindOfClass:[UIScrollView class]]){
                UIScrollView *scrollView = (UIScrollView *)view;
                scrollView.scrollEnabled = NO;
            }
        }
    }
}

if ([scrollView isAtBottom]) {

    for (UIView *view in selectedViewController.view.subviews) {
        if ([view isKindOfClass:[UITableView class]]) {
            UITableView *tableView = (UITableView*)view;
            tableView.scrollEnabled = YES;
        }
        else if ([view isKindOfClass:[UIScrollView class]]){
            UIScrollView *scrollView = (UIScrollView *)view;
            scrollView.scrollEnabled = YES;
        }
    }
}
}

现在我的问题是当父级的滚动视图达到固定的内容偏移量时，子视图的滚动/表视图没有滚动，然后必须滚动子视图的滚动视图！这里似乎有什么问题？

PS。我检查了 childview 的 Scroll/TableView 的框架和内容大小，这不是问题。

注意：我看到我的子视图的表格/滚动视图的滚动已在一个方向上被禁用，而在另一个方向上被启用！

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0 回答 0