获取页面视图以在最后一个屏幕上弹出 [英] Get Page View to pop off on last screen

问题描述

我在我的应用程序中实现了一个功能性的教程介绍，但是当我最后一次滑动屏幕时，似乎无法弹出页面视图.我以为dismissViewControllerAnimated:completion:可以工作

I have a functional tutorial intro implemented into my app, but i just can't seem to get the page view to pop off when i swipe the screen for the last time. I thought dismissViewControllerAnimated:completion: would work

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController
{
    NSUInteger index = ((PageContentViewController*) viewController).pageIndex;

    if (index == NSNotFound) {
        return nil;
    }

    index++;
    if (index == [self.pageTitles count]) {
        [self.pageViewController dismissViewControllerAnimated:YES completion:nil];
    }
    return [self viewControllerAtIndex:index];
}

我想出了如何使它消失，但是到最后一页时它就消失了.我希望它显示最后一页，然后在用户再次在最后一页上向右滑动时消失.

I figured out how to get it to go away, but it goes away right when it gets to the last page. I want it to show the last page and then go away when the user swipes right again on that last page.

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController
{
    NSUInteger index = ((PageContentViewController*) viewController).pageIndex;

    if (index == NSNotFound) {
        return nil;
    }

    index++;
    if (index == [self.pageTitles count]) {
        [self.pageViewController.view removeFromSuperview];
    }
    return [self viewControllerAtIndex:index];
}

推荐答案

页面视图控制器是您的主要viewcontrollers子视图控制器，这是删除childViewController的正确方法:

Page View Controller is your main viewcontrollers child view controller, this is the correct way to remove childViewController:

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController
{
    NSUInteger index = ((PageContentViewController*) viewController).pageIndex;

    if (index == NSNotFound) {
        return nil;
    }

    index++;

    if (index == [self.pageTitles count]) {
        [pageViewController willMoveToParentViewController:nil];  // 1
        [pageViewController.view removeFromSuperview];            // 2
        [pageViewController removeFromParentViewController];      // 3   
    }

    return [self viewControllerAtIndex:index];
}

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