如何使UIPageViewController自动滑动无限重复？

Question

如何让我的UIPageViewController自动滑动图像？

我已经创建并实现了所有内容，现在我希望它能够以10秒的时间间隔自动滑动图像......

任何人都可以帮我吗？

Answer 1

在管理UIPageViewController的类中：

拥有像

这样的属性

@property NSInteger currentIndex;

将其设置为0，每次更改为另一个viewController时，更新其值（_currentIndex ++ / _currentIndex - ）

然后实现NSTimer：

[NSTimer scheduledTimerWithTimeInterval:10.0
    target:self
    selector:@selector(changeController:)
    userInfo:nil
    repeats:YES];

并添加此方法

- (void) changeController:(NSTimer*)timer
{
   UIViewController yourViewController = [self itemControllerForIndex: self.currentIndex+1];
   self.currentIndex++;
   NSArray *array = [NSArray arrayWithObjects:yourViewController] 
   [yourPageViewController setViewControllers:array direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:nil];
}

希望它有所帮助...

Answer 2

每次要更改页面时，都需要调用- setViewControllers:direction:animated:completion:方法。

您可以使用NSTimer来启动您自己的中间方法，该方法使用上述方法设置相应的页面。

Answer 3

这是我的代码：

- (UIViewController *) pageViewController: (UIPageViewController *) pageViewController viewControllerBeforeViewController:(UIViewController *) viewController
    {
        HelpPageViewController *itemController = (HelpPageViewController *) viewController;

        if (itemController.itemIndex > 0)
        {
            return [self itemControllerForIndex: itemController.itemIndex-1]; // bilo je -1
        }



       return nil;

        }

    - (UIViewController *) pageViewController: (UIPageViewController *) pageViewController viewControllerAfterViewController:(UIViewController *) viewController
    {
        HelpPageViewController *itemController = (HelpPageViewController *) viewController;

        if (itemController.itemIndex+1 < [contentImages count]) // bilo je <
        {
            return [self itemControllerForIndex: itemController.itemIndex+1];
        }

        return nil;


    }

    UIPageViewController *scrollingHeader = [self.storyboard instantiateViewControllerWithIdentifier: @"ScrollingHeader"];
        scrollingHeader.dataSource = self;

        if([contentImages count])
        {


            NSArray *startingViewControllers = @[[self itemControllerForIndex: 0]];
            [scrollingHeader setViewControllers: startingViewControllers
                                     direction: UIPageViewControllerNavigationDirectionForward

                                      animated: NO
                                    completion: nil];
        }

        self.pageViewController = scrollingHeader;
        [self addChildViewController: self.pageViewController];
        [self.view addSubview: self.pageViewController.view];



        [self.pageViewController didMoveToParentViewController: self];