UIPageViewController和故事板

Question

我正在尝试从故事板中特定配置UIPageViewController:

TutorialPageViewController.h

#import <UIKit/UIKit.h>
@interface TutorialPageViewController : UIPageViewController <UIPageViewControllerDelegate, UIPageViewControllerDataSource>
@end

TutorialPageViewController.m

#import "TutorialPageViewController.h"

@interface TutorialPageViewController ()
@property (assign, nonatomic) NSInteger index;
@end

@implementation TutorialPageViewController
{
    NSArray *myViewControllers;
}

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.delegate = self;
    self.dataSource = self;
    [self didMoveToParentViewController:self];
    UIStoryboard *tutorialStoryboard = [UIStoryboard storyboardWithName:@"TutorialStoryboard" bundle:[NSBundle mainBundle]];
    UIViewController *tuto1 = [tutorialStoryboard instantiateViewControllerWithIdentifier:@"TutorialPageViewController_1"];
    UIViewController *tuto2 = [tutorialStoryboard instantiateViewControllerWithIdentifier:@"TutorialPageViewController_2"];

    myViewControllers = @[tuto1, tuto2, tuto1, tuto2];
    self.index = 0;

    [self setViewControllers:@[tuto1] direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:nil];
}

- (UIViewController *)viewControllerAtIndex:(NSUInteger)index {
    return myViewControllers[index];
}

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController {

    NSUInteger index = self.index;

    if (index == 0) { return nil; }

    // Decrease the index by 1 to return
    index--;
    return [self viewControllerAtIndex:index];
}

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController {

    NSUInteger index = self.index;
    index++;
    if (index > [myViewControllers count]) { return nil; }

    return [self viewControllerAtIndex:index];
}

- (NSInteger)presentationCountForPageViewController:(UIPageViewController *)pageViewController {
    // The number of items reflected in the page indicator.
    return [myViewControllers count];
}

- (NSInteger)presentationIndexForPageViewController:(UIPageViewController *)pageViewController {
    // The selected item reflected in the page indicator.
    return 0;
}

@end

问题是......

• 第一页显示页面指示器.在刷卡的同时
• 我可以正确看到第二页.
• 转换完成后,我会看到一个黑屏(页面指示器正确显示第2页的页面).没有用户互动可用.

Answer 1

2017答案..

现在只需使用Storyboard即可轻松完成.

这些"刷全屏教程"作为app"intros"很受欢迎,所以我打电话给下面的课程IntroPages.

步骤1,创建一个UIPageViewController的容器视图.

如果是iOS的新手,这里是一个容器视图教程.

(注意:如果您不知道如何将容器视图更改为UIPageViewController,请向下滚动到该教程中的"如何更改..."部分.

)

您可以将容器制作成您想要的任何形状.与任何容器视图一样,它可以是全屏或屏幕的一小部分 - 无论您想要什么.

第2步,

制作四个简单的视图控制器,可以是任何你想要的 - 图像,文本,表格,任何东西.(示例中为紫色.)

请注意,他们只是坐在你的故事板上,不要将它们链接到任何东西.

第3步,您必须设置这四个页面的ID."id1","id2","id4","id4"很好.

第4步,复制粘贴!这是IntroPages类,

class IntroPages: UIPageViewController, UIPageViewControllerDataSource, UIPageViewControllerDelegate {

    var pages = [UIViewController]()

    override func viewDidLoad() {
        super.viewDidLoad()
        self.delegate = self
        self.dataSource = self

        let p1: UIViewController! = storyboard?.instantiateViewController(withIdentifier: "id1")
        let p2: UIViewController! = storyboard?.instantiateViewController(withIdentifier: "id2")
        let p3: UIViewController! = storyboard?.instantiateViewController(withIdentifier: "id3")

        // etc ...

        pages.append(p1)
        pages.append(p2)
        pages.append(p3)

        // etc ...

        setViewControllers([p1], direction: UIPageViewControllerNavigationDirection.forward, animated: false, completion: nil)
    }

    func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController)-> UIViewController? {

        let cur = pages.index(of: viewController)!

        // if you prefer to NOT scroll circularly, simply add here:
        // if cur == 0 { return nil }

        var prev = (current - 1) % pages.count
        if prev < 0 {
            prev = pages.count - 1
        }
        return pages[prev]
    }

    func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController)-> UIViewController? {

        let cur = pages.index(of: viewController)!

        // if you prefer to NOT scroll circularly, simply add here:
        // if cur == (pages.count - 1) { return nil }

        let nxt = abs((cur + 1) % pages.count)
        return pages[nxt]
    }

    func presentationIndex(for pageViewController: UIPageViewController)-> Int {
        return pages.count
    }
}

(查看注释 - 您可以根据需要使用循环或线性分页的代码.)

这就是它的全部 - 你已经完成了.

您只需在故事板上设置过渡样式,

你很可能想要"滚动",而不是另一个.

Answer 2

对于想要查看工作页面滚动(向前/向后)的人

-(UIViewController *)pageViewController:(UIPageViewController *)pageViewController
     viewControllerBeforeViewController:(UIViewController *)viewController
  {
     NSUInteger currentIndex = [myViewControllers indexOfObject:viewController];
     // get the index of the current view controller on display

     if (currentIndex > 0)
     {
        return [myViewControllers objectAtIndex:currentIndex-1];
        // return the previous viewcontroller
     } else
     {
         return nil;
         // do nothing
     }
  }
-(UIViewController *)pageViewController:(UIPageViewController *)pageViewController
 viewControllerAfterViewController:(UIViewController *)viewController
  {
     NSUInteger currentIndex = [myViewControllers indexOfObject:viewController];
     // get the index of the current view controller on display
     // check if we are at the end and decide if we need to present
     // the next viewcontroller
     if (currentIndex < [myViewControllers count]-1)
     {
        return [myViewControllers objectAtIndex:currentIndex+1];
        // return the next view controller
     } else
     {
        return nil;
        // do nothing
     }
  }

只是为了增加EditOR这个伟大的答案,如果你更喜欢"round and around"分页,你会做什么:仍然使用相同的EditOR技术

-(UIViewController *)pageViewController:(UIPageViewController *)pageViewController
        viewControllerBeforeViewController:(UIViewController *)viewController
    {
    NSUInteger currentIndex = [myViewControllers indexOfObject:viewController];

    --currentIndex;
    currentIndex = currentIndex % (myViewControllers.count);
    return [myViewControllers objectAtIndex:currentIndex];
    }

-(UIViewController *)pageViewController:(UIPageViewController *)pageViewController
        viewControllerAfterViewController:(UIViewController *)viewController
    {
    NSUInteger currentIndex = [myViewControllers indexOfObject:viewController];

    ++currentIndex;
    currentIndex = currentIndex % (myViewControllers.count);
    return [myViewControllers objectAtIndex:currentIndex];
    } 

Answer 3

使用Swift代码扩展Joe Blow的答案UIPageViewController:

import UIKit

class MyPageViewController: UIPageViewController, UIPageViewControllerDataSource, UIPageViewControllerDelegate {

    var pages = [UIViewController]()

    override func viewDidLoad() {
        super.viewDidLoad()

        self.delegate = self
        self.dataSource = self

        let page1: UIViewController! = storyboard?.instantiateViewControllerWithIdentifier("page1")
        let page2: UIViewController! = storyboard?.instantiateViewControllerWithIdentifier("page2")

        pages.append(page1)
        pages.append(page2)

        setViewControllers([page1], direction: UIPageViewControllerNavigationDirection.Forward, animated: false, completion: nil)
    }

    func pageViewController(pageViewController: UIPageViewController, viewControllerBeforeViewController viewController: UIViewController) -> UIViewController? {
        let currentIndex = pages.indexOf(viewController)!
        let previousIndex = abs((currentIndex - 1) % pages.count)
        return pages[previousIndex]
    }

    func pageViewController(pageViewController: UIPageViewController, viewControllerAfterViewController viewController: UIViewController) -> UIViewController? {
        let currentIndex = pages.indexOf(viewController)!
        let nextIndex = abs((currentIndex + 1) % pages.count)
        return pages[nextIndex]
    }

    func presentationCountForPageViewController(pageViewController: UIPageViewController) -> Int {
        return pages.count
    }

    func presentationIndexForPageViewController(pageViewController: UIPageViewController) -> Int {
        return 0
    }
}

阅读更多关于使用带有故事板设置的容器视图的UIPageViewController.

Answer 4

在Storyboard中似乎有很多关于UIPageViewController的问题.

下面是一些演示代码,向您展示如何在故事板中将UIPageViewController用作独立的全屏视图或UIContainerView,如果您只想在屏幕的一小部分区域进行分页.