UIPageViewController iOS 8的下一页按钮-objC

实际上，我正在尝试使用PageViewController填充图库。我成功地将滚动图像带到视图中，但是，我使用了页面视图控制器中的“下一步”和“上一步”按钮，因为我使用了这行代码，所以无法正常工作

- (IBAction)previousButtonPressed:(id)sender {
    PageContentViewController *startingViewController = [self viewControllerAtIndex:0];
    NSArray *viewControllers = @[startingViewController];
    [self.pageViewController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionReverse animated:NO completion:nil];
}

- (IBAction)nextButtonPressed:(id)sender {
    PageContentViewController *startingViewController = [self viewControllerAtIndex:+1];
    NSArray *viewControllers = @[startingViewController];
    [self.pageViewController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:nil];
    }

由于我在-（iAction）下一个按钮按下时使用了viewControllerAtIndex:+1：（id）sender我只在第一次点击按钮操作时，按钮操作才起作用。 提前感谢

检查此代码：-

- (void)changePage:(UIPageViewControllerNavigationDirection)direction {
    NSUInteger pageIndex = ((FooViewController *) [_pageViewController.viewControllers objectAtIndex:0]).pageIndex;
    if (direction == UIPageViewControllerNavigationDirectionForward){
        pageIndex++;
    }else {
        pageIndex--;
    }
    YourViewController *viewController = [self  viewControllerAtIndex:pageIndex];
    if (viewController == nil) {
        return;
    }
    [_pageViewController setViewControllers:@[viewController] direction:direction animated:YES completion:nil];
}

//上一个按钮

- (IBAction)previousButtonPressed:(id)sender {
    [self changePage:UIPageViewControllerNavigationDirectionReverse];
}

//下一个按钮

- (IBAction)nextButtonPressed:(id)sender {
    [self changePage:UIPageViewControllerNavigationDirectionForward];
}

检查此代码：-

- (void)changePage:(UIPageViewControllerNavigationDirection)direction {
    NSUInteger pageIndex = ((FooViewController *) [_pageViewController.viewControllers objectAtIndex:0]).pageIndex;
    if (direction == UIPageViewControllerNavigationDirectionForward){
        pageIndex++;
    }else {
        pageIndex--;
    }
    YourViewController *viewController = [self  viewControllerAtIndex:pageIndex];
    if (viewController == nil) {
        return;
    }
    [_pageViewController setViewControllers:@[viewController] direction:direction animated:YES completion:nil];
}

//上一个按钮

- (IBAction)previousButtonPressed:(id)sender {
    [self changePage:UIPageViewControllerNavigationDirectionReverse];
}

//下一个按钮

- (IBAction)nextButtonPressed:(id)sender {
    [self changePage:UIPageViewControllerNavigationDirectionForward];
}

---

Chandan的答案非常有效。 在swift 3.0中检查此项

func changePage(direction:UIPageViewControllerNavigationDirection)
{
    var pageIndex = (pageViewController.viewControllers?[0] as! SliderContentVC).pageIndex
    if(direction == UIPageViewControllerNavigationDirection.forward)
    {
        pageIndex = pageIndex! + 1
    }
    else
    {
        pageIndex = pageIndex! - 1
    }
    let viewController = self.viewControllerAtIndex(index: pageIndex!)
    if(viewController == nil)
    {
        return;
    }
    else
    {
        self.pageViewController.setViewControllers([viewController!], direction: direction, animated: true, completion: nil)
    }
}

//上一次单击

@IBAction func btnGoBack_Click(_ sender: Any)
{
    self.changePage(direction: .reverse)
}

//回击

@IBAction func btn_GoForward_Click(_ sender: Any)
{
    self.changePage(direction: .forward)
}

//视图索引法

func viewControllerAtIndex(index : Int) -> UIViewController?
{
    if(index < 0 || index >= MAX_COUNT)
    {
        return nil
    }
    let pageContentViewController = self.storyboard?.instantiateViewController(withIdentifier: "SliderContentVC") as! SliderContentVC
    pageContentViewController.pageIndex = index
    return pageContentViewController
}

func viewControllerAtIndex（index:Int）->UIViewController？
{
如果（索引<0 | |索引>=最大计数）
{
归零
}
将pageContentViewController=self.storyboard？.InstanceEviewController（标识符为：“SliderContentVC”）设为！SliderContentVC
pageContentViewController.pageIndex=索引
返回页面内容视图控制器
}

Chandan的答案非常有效。 在swift 3.0中检查此项

func changePage(direction:UIPageViewControllerNavigationDirection)
{
    var pageIndex = (pageViewController.viewControllers?[0] as! SliderContentVC).pageIndex
    if(direction == UIPageViewControllerNavigationDirection.forward)
    {
        pageIndex = pageIndex! + 1
    }
    else
    {
        pageIndex = pageIndex! - 1
    }
    let viewController = self.viewControllerAtIndex(index: pageIndex!)
    if(viewController == nil)
    {
        return;
    }
    else
    {
        self.pageViewController.setViewControllers([viewController!], direction: direction, animated: true, completion: nil)
    }
}

//上一次单击

@IBAction func btnGoBack_Click(_ sender: Any)
{
    self.changePage(direction: .reverse)
}

//回击

@IBAction func btn_GoForward_Click(_ sender: Any)
{
    self.changePage(direction: .forward)
}

//视图索引法

func viewControllerAtIndex(index : Int) -> UIViewController?
{
    if(index < 0 || index >= MAX_COUNT)
    {
        return nil
    }
    let pageContentViewController = self.storyboard?.instantiateViewController(withIdentifier: "SliderContentVC") as! SliderContentVC
    pageContentViewController.pageIndex = index
    return pageContentViewController
}

func viewControllerAtIndex（index:Int）->UIViewController？
{
如果（索引<0 | |索引>=最大计数）
{
归零
}
将pageContentViewController=self.storyboard？.InstanceEviewController（标识符为：“SliderContentVC”）设为！SliderContentVC
pageContentViewController.pageIndex=索引
返回页面内容视图控制器
}

对于上一个和下一个按钮，您希望视图控制器的索引为currentViewControllerIndex-1和currentViewControllerIndex+1，而不是o和1。跟踪当前索引并相应地传递下一个或上一个索引。对于上一个和下一个按钮，您希望视图控制器位于索引currentViewControllerIndex-1和currentViewControllerIndex+1，而不是o和1。跟踪当前索引，并相应地传递下一个或上一个索引。做得很好。在搜索了这么多不好的答案后，感谢您的回答。什么是FooViewController，我在数组中有视图控制器。如何在中转到下一个vcuipagedviewcontroller@satFooViewController只是我使用过的UIViewController。您可以使用您的自定义控制器名称而不是FooViewController。@Chandan我使用的vc数组类似于UIViewController*tuto1=[tutorialStoryboard InstanceDeviceController WithiIdentifier:@“firstVc”]；UIViewController*tuto2=[tutorialStoryboard实例化设备控件标识符：@“secondvc”]；UIViewController*tuto3=[tutorialStoryboard InstanceDeviceController的标识符：@“TermsAndConditionsVC”]；UIViewController*tuto4=[tutorialStoryboard InstanceDeviceController的标识符：@“PermissionsVC]”；UIViewController*tuto5=[tutorialStoryboard实例化设备控制器标识符：@“MobileNumberVC”]@Chandan MyViewController=@[tuto1，tuto2，tuto3，tuto4，tuto5]；在pagedvc中，我使用了两个按钮，如果我在showld中单击按钮，则转到下一步，如果我单击按钮，则应返回，我在vc中没有使用任何按钮，我只使用了2个按钮来完成这项非常好的工作..在搜索了这么多错误的答案后，感谢您的回答。什么是FooViewController，我有一个数组中的视图控制器。如何转到中的下一个vcuipagedviewcontroller@satFooViewController只是我使用过的UIViewController。您可以使用您的自定义控制器名称而不是FooViewController。@Chandan我使用的vc数组类似于UIViewController*tuto1=[tutorialStoryboard InstanceDeviceController WithiIdentifier:@“firstVc”]；UIViewController*tuto2=[tutorialStoryboard实例化设备控件标识符：@“secondvc”]；UIViewController*tuto3=[tutorialStoryboard InstanceDeviceController的标识符：@“TermsAndConditionsVC”]；UIViewController*tuto4=[tutorialStoryboard InstanceDeviceController的标识符：@“PermissionsVC]”；UIViewController*tuto5=[tutorialStoryboard实例化设备控制器标识符：@“MobileNumberVC”]@Chandan MyViewController=@[tuto1，tuto2，tuto3，tuto4，tuto5]；在pagedvc中，我使用了2个按钮，如果我在showld中单击按钮，则转到下一步，如果我单击按钮，则应返回，我在vc中没有使用任何按钮，我仅使用2个按钮来执行此操作