Answers:
是的，可以使用以下方法：
- (void)setViewControllers:(NSArray *)viewControllers
direction:(UIPageViewControllerNavigationDirection)direction
animated:(BOOL)animated
completion:(void (^)(BOOL finished))completion;`这与在页面上设置第一个视图控制器所使用的方法相同。同样，您可以使用它来转到其他页面。
想知道为什么viewControllers是数组而不是单个视图控制器？
这是因为页面视图控制器可能具有“书脊”（例如在iBooks中），一次显示2页内容。如果一次显示一页内容，则只需传入一个1元素的数组即可。
Swift中的示例：
pageContainer.setViewControllers([displayThisViewController], direction: .Forward, animated: true, completion: nil)由于我也需要这样做，因此我将详细介绍如何执行此操作。
注意：我假设您使用标准模板形式来生成您的UIPageViewController结构- 在调用结构时同时具有modelViewController和dataViewController。如果您不明白我写的内容，请回去创建一个新的项目，并UIPageViewController以此为基础。那你会明白的。
因此，需要翻转到特定页面涉及设置上面列出的方法的各个部分。对于本练习，我假设它是一个具有两个视图的风景视图。 另外，我将其实现为IBAction，以便可以通过按下按钮或不通过按钮进行操作-使选择器调用并传递所需的项目也很容易。
因此，在此示例中，您将需要显示两个视图控制器-以及（可选）是向前还是向后。
请注意，我只是硬编码到第4和5页的位置，并使用向前滑动。从这里您可以看到，您需要做的就是传递变量，这些变量将帮助您获取这些项目。
-(IBAction) flipToPage:(id)sender {
// Grab the viewControllers at position 4 & 5 - note, your model is responsible for providing these.
// Technically, you could have them pre-made and passed in as an array containing the two items...
DataViewController *firstViewController = [self.modelController viewControllerAtIndex:4 storyboard:self.storyboard];
DataViewController *secondViewController = [self.modelController viewControllerAtIndex:5 storyboard:self.storyboard];
// Set up the array that holds these guys...
NSArray *viewControllers = nil;
viewControllers = [NSArray arrayWithObjects:firstViewController, secondViewController, nil];
// Now, tell the pageViewContoller to accept these guys and do the forward turn of the page.
// Again, forward is subjective - you could go backward. Animation is optional but it's
// a nice effect for your audience.
[self.pageViewController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:NULL];
// Voila' - c'est fin!
}这是单个页面视图的另一个代码示例。这里省略了viewControllerAtIndex的实现，它应返回给定索引的正确视图控制器。
- (void)changePage:(UIPageViewControllerNavigationDirection)direction {
NSUInteger pageIndex = ((FooViewController *) [_pageViewController.viewControllers objectAtIndex:0]).pageIndex;
if (direction == UIPageViewControllerNavigationDirectionForward) {
pageIndex++;
}
else {
pageIndex--;
}
FooViewController *viewController = [self viewControllerAtIndex:pageIndex];
if (viewController == nil) {
return;
}
[_pageViewController setViewControllers:@[viewController]
direction:direction
animated:YES
completion:nil];
}可以通过调用来更改页面
[self changePage:UIPageViewControllerNavigationDirectionReverse];
[self changePage:UIPageViewControllerNavigationDirectionForward];我可能在这里完全错过了一些东西，但是这个解决方案似乎比其他许多提议要简单得多。
extension UIPageViewController {
func goToNextPage(animated: Bool = true, completion: ((Bool) -> Void)? = nil) {
if let currentViewController = viewControllers?[0] {
if let nextPage = dataSource?.pageViewController(self, viewControllerAfter: currentViewController) {
setViewControllers([nextPage], direction: .forward, animated: animated, completion: completion)
}
}
}
}这段代码对我来说很好用，谢谢。
这就是我所做的。有一些前进或后退的方法，以及一种直接进入特定页面的方法。纵向显示6页文档。如果将其粘贴到pageViewController模板的RootController的实现中，它将可以正常工作。
-(IBAction)pageGoto:(id)sender {
//get page to go to
NSUInteger pageToGoTo = 4;
//get current index of current page
DataViewController *theCurrentViewController = [self.pageViewController.viewControllers objectAtIndex:0];
NSUInteger retreivedIndex = [self.modelController indexOfViewController:theCurrentViewController];
//get the page(s) to go to
DataViewController *targetPageViewController = [self.modelController viewControllerAtIndex:(pageToGoTo - 1) storyboard:self.storyboard];
DataViewController *secondPageViewController = [self.modelController viewControllerAtIndex:(pageToGoTo) storyboard:self.storyboard];
//put it(or them if in landscape view) in an array
NSArray *theViewControllers = nil;
theViewControllers = [NSArray arrayWithObjects:targetPageViewController, secondPageViewController, nil];
//check which direction to animate page turn then turn page accordingly
if (retreivedIndex < (pageToGoTo - 1) && retreivedIndex != (pageToGoTo - 1)){
[self.pageViewController setViewControllers:theViewControllers direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:NULL];
}
if (retreivedIndex > (pageToGoTo - 1) && retreivedIndex != (pageToGoTo - 1)){
[self.pageViewController setViewControllers:theViewControllers direction:UIPageViewControllerNavigationDirectionReverse animated:YES completion:NULL];
}
}
-(IBAction)pageFoward:(id)sender {
//get current index of current page
DataViewController *theCurrentViewController = [self.pageViewController.viewControllers objectAtIndex:0];
NSUInteger retreivedIndex = [self.modelController indexOfViewController:theCurrentViewController];
//check that current page isn't first page
if (retreivedIndex < 5){
//get the page to go to
DataViewController *targetPageViewController = [self.modelController viewControllerAtIndex:(retreivedIndex + 1) storyboard:self.storyboard];
//put it(or them if in landscape view) in an array
NSArray *theViewControllers = nil;
theViewControllers = [NSArray arrayWithObjects:targetPageViewController, nil];
//add page view
[self.pageViewController setViewControllers:theViewControllers direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:NULL];
}
}
-(IBAction)pageBack:(id)sender {
//get current index of current page
DataViewController *theCurrentViewController = [self.pageViewController.viewControllers objectAtIndex:0];
NSUInteger retreivedIndex = [self.modelController indexOfViewController:theCurrentViewController];
//check that current page isn't first page
if (retreivedIndex > 0){
//get the page to go to
DataViewController *targetPageViewController = [self.modelController viewControllerAtIndex:(retreivedIndex - 1) storyboard:self.storyboard];
//put it(or them if in landscape view) in an array
NSArray *theViewControllers = nil;
theViewControllers = [NSArray arrayWithObjects:targetPageViewController, nil];
//add page view
[self.pageViewController setViewControllers:theViewControllers direction:UIPageViewControllerNavigationDirectionReverse animated:YES completion:NULL];
}
}斯威夫特4：
当我点击pagecontroller视图控制器上的next并更新pageControl索引时，我需要转到下一个控制器，所以这对我来说是最好，最直接的解决方案：
let pageController = self.parent as! PageViewController
pageController.setViewControllers([parentVC.orderedViewControllers[1]], direction: .forward, animated: true, completion: nil)
pageController.pageControl.currentPage = 1如何使用dataSource中的方法？
UIViewController *controller = [pageViewController.dataSource pageViewController:self.pageViewController viewControllerAfterViewController:pageViewController.viewControllers.firstObject];
[pageViewController setViewControllers:@[controller] direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:nil];类推后退。
在Swift中：
import UIKit
extension HomeViewController {
// MARK: - Carousel management.
func startTimerForMovingCarousel(let numberOfSecondsBetweenFiringsOfTheTimer: NSTimeInterval) {
if (self.timerForMovingCarousel == nil) {
self.timerForMovingCarousel = NSTimer.scheduledTimerWithTimeInterval(numberOfSecondsBetweenFiringsOfTheTimer,
target: self,
selector: "moveCarousel",
userInfo: nil,
repeats: true)
}
}
func moveCarousel() {
println("I move the carousel.")
let currentContentViewControllerDisplayed = self.pageViewController!.viewControllers[0] as! ContentViewController
var index: Int = currentContentViewControllerDisplayed.index
if index == self.arrayViewControllers.count - 1 {
index = 0
} else {
++index
}
let contentViewControllerToDisplay = self.arrayViewControllers[index] as! ContentViewController
self.pageViewController.setViewControllers([contentViewControllerToDisplay],
direction: UIPageViewControllerNavigationDirection.Forward,
animated: true,
completion: nil)
self.pageControl.currentPage = contentViewControllerToDisplay.index
}
func invalidateTimerForMovingCarousel() {
if (self.timerForMovingCarousel != nil) {
self.timerForMovingCarousel.invalidate()
self.timerForMovingCarousel = nil
}
}
}我还需要一个按钮在PageViewController上向左导航，该按钮应能完全完成滑动动作所期望的操作。
由于我已经在“ pageViewController：viewControllerBeforeViewController ” 内部设置了一些规则来处理自然的滑动导航，因此我希望该按钮重新使用所有代码，并且像以前一样，无法使用特定的索引来访问页面回答了。因此，我不得不采取替代解决方案。
请注意，以下代码用于页面视图控制器，它是我的自定义ViewController中的一个属性，并且其主干线设置为中。
这是我为“向左导航”按钮编写的代码：
- (IBAction)btnNavigateLeft_Click:(id)sender {
// Calling the PageViewController to obtain the current left page
UIViewController *currentLeftPage = [_pageController.viewControllers objectAtIndex:0];
// Creating future pages to be displayed
NSArray *newDisplayedPages = nil;
UIViewController *newRightPage = nil;
UIViewController *newLeftPage = nil;
// Calling the delegate to obtain previous pages
// My "pageViewController:viewControllerBeforeViewController" method returns nil if there is no such page (first page of the book).
newRightPage = [self pageViewController:_pageController viewControllerBeforeViewController:currentLeftPage];
if (newRightPage) {
newLeftPage = [self pageViewController:_pageController viewControllerBeforeViewController:newRightPage];
}
if (newLeftPage) {
newDisplayedPages = [[NSArray alloc] initWithObjects:newLeftPage, newRightPage, nil];
}
// If there are two new pages to display, show them with animation.
if (newDisplayedPages) {
[_pageController setViewControllers:newDisplayedPages direction:UIPageViewControllerNavigationDirectionReverse animated:YES completion:nil];
}
}您可以执行类似的操作以从此处创建一个右导航按钮。
在情况下，如果页面控件显示当前的页面是O &&你想要的页面通过滚动＆也可通过点击页面视图控制器的自定义按钮浏览，下面可能会有所帮助。
//Set Delegate & Data Source for PageView controller [Say in View Did Load]
self.pageViewController.dataSource = self;
self.pageViewController.delegate = self;
// Delegates called viewControllerBeforeViewController when User Scroll to previous page
- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController{
[_nextBtn setTitle:@"Next" forState:UIControlStateNormal];
NSUInteger index = ((PageContentViewController*) viewController).pageIndex;
if (index == NSNotFound){
return nil;
}else if (index > 0){
index--;
}else{
return nil;
}
return [self viewControllerAtIndex:index];
}//当用户滚动到下一页时，委托名为viewControllerAfterViewController的代理
- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController{
NSUInteger index = ((PageContentViewController*) viewController).pageIndex;
if (index == NSNotFound){
return nil;
}else if (index < 3){
index++;
}else{
return nil;
}
return [self viewControllerAtIndex:index];}
//Delegate called while transition of pages. The need to apply logic in this delegate is to maintain the index of current page.
- (void)pageViewController:(UIPageViewController *)pageViewController willTransitionToViewControllers:(NSArray *)pendingViewControllers{
buttonIndex = (int)((PageContentViewController*) pendingViewControllers.firstObject).pageIndex;}
-(void)pageViewController:(UIPageViewController *)pageViewController didFinishAnimating:(BOOL)finished previousViewControllers:(NSArray *)previousViewControllers transitionCompleted:(BOOL)completed{
if (buttonIndex == 0){
_backButton.hidden = true;
}else if (buttonIndex == [self.pageImages count] - 1){
_backButton.hidden = false;
[_nextBtn setTitle:@"Begin" forState:UIControlStateNormal];
}else{
_backButton.hidden = false;
}}
//自定义按钮的（上一个和下一个）逻辑
-(void)backBtnClicked:(id)sender{
if (buttonIndex > 0){
buttonIndex -= 1;
}
if (buttonIndex < 1) {
_backButton.hidden = YES;
}
if (buttonIndex >=0) {
[_nextBtn setTitle:@"Next" forState:UIControlStateNormal];
PageContentViewController *startingViewController = [self viewControllerAtIndex:buttonIndex];
NSArray *viewControllers = @[startingViewController];
[self.pageViewController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:nil];
}}
-(void)nextBtnClicked:(id)sender{
if (buttonIndex < 3){
buttonIndex += 1;
}
if(buttonIndex == _pageImages.count){
//Navigate Outside Pageview controller
}else{
if (buttonIndex ==3) {
[_nextBtn setTitle:@"Begin" forState:UIControlStateNormal];
}
_backButton.hidden = NO;
PageContentViewController *startingViewController = [self viewControllerAtIndex:buttonIndex];
NSArray *viewControllers = @[startingViewController];
[self.pageViewController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:nil];
}}
//BUTTON INDEX & MAX COUNT
-(NSInteger)presentationCountForPageViewController:(UIPageViewController *)pageViewController{
return [self.pageImages count];}
-(NSInteger)presentationIndexForPageViewController:(UIPageViewController *)pageViewController{
return buttonIndex;}- (void)moveToPage {
NSUInteger pageIndex = ((ContentViewController *) [self.pageViewController.viewControllers objectAtIndex:0]).pageIndex;
pageIndex++;
ContentViewController *viewController = [self viewControllerAtIndex:pageIndex];
if (viewController == nil) {
return;
}
[self.pageViewController setViewControllers:@[viewController] direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:nil];
}//现在调用此方法
[self moveToPage];
我希望它能起作用:)
对于单页，我只是编辑了@Jack Humphries的答案
-(void)viewDidLoad
{
counter = 0;
}
-(IBAction)buttonClick:(id)sender
{
counter++;
DataViewController *secondVC = [self.modelController viewControllerAtIndex:counter storyboard:self.storyboard];
NSArray *viewControllers = nil;
viewControllers = [NSArray arrayWithObjects:secondVC, nil];
[self.pageViewController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:NULL];
}从昨天开始我一直在研究它，我终于做到了。我不能完全使用标准模板，因为我有三种不同的viewControllers作为子视图：
1 - rootViewController;
2 - model;
3 - viewControllers
3.1 - VC1;
3.2 - VC2;
3.3 - VC3.
Note: all of VCs has Storyboard ID.我只需要在第一个VC中使用触发器按钮，因此为pageViewController和model添加了一个属性：
#import <UIKit/UIKit.h>
#import "Model.h"
@interface VC1 : UIViewController
@property (nonatomic, strong) UIPageViewController *thePageViewController;
@property (nonatomic, strong) SeuTimePagesModel *theModel;
@end我重写了模型的init方法以将Storyboard和pageViewController作为参数传递，因此可以将它们设置为VC1：
- (id)initWithStoryboard:(UIStoryboard *)storyboard
andPageViewController:(UIPageViewController *)controller
{
if (self = [super init])
{
VC1 *vc1 = [storyboard instantiateViewControllerWithIdentifier:@"VC1"];
vc1.pageViewController = controller;
vc1.model = self;
VC2 *vc2 = [storyboard instantiateViewControllerWithIdentifier:@"VC2"];
VC3 *vc3 = [storyboard instantiateViewControllerWithIdentifier:@"VC3"];
self.pageData = [[NSArray alloc] initWithObjects:vc1, vc2, vc3, nil];
}
return self;
}最后，我在vc1中添加了IBAction来触发pageViewController方法 setViewControllers：direction：animated：completion：：
- (IBAction)go:(id)sender
{
VC2 *vc2 = [_model.pages objectAtIndex:1];
NSArray *viewControllers = @[vc2];
[_pageViewController setViewControllers:viewControllers
direction:UIPageViewControllerNavigationDirectionForward
animated:YES
completion:nil];
}注意，我不需要找到VC索引，我的按钮将我带到了我的第二个VC，但是获取所有索引并跟踪您的子视图并不难：
- (IBAction)selecionaSeuTime:(id)sender
{
NSUInteger index = [_model.pages indexOfObject:self];
index++;
VC2 *vc2 = [_model.pages objectAtIndex:1];
NSArray *viewControllers = @[vc2];
[_pageViewController setViewControllers:viewControllers
direction:UIPageViewControllerNavigationDirectionForward
animated:YES
completion:nil];
}希望对您有帮助！
这是使用UIPageViewControllerDataSource方法的解决方案：
该代码在UIPageViewController中跟踪当前显示的视图控制器。
...
@property (nonatomic, strong) UIViewController *currentViewController;
@property (nonatomic, strong) UIViewController *nextViewController;
...首先将currentViewController初始化为UIPageViewController设置的初始视图控制器。
- (void) viewDidLoad {
[super viewDidLoad];
...
self.currentViewController = self.viewControllers[0];
...
[self.pageViewController setViewControllers: @[self.currentViewController] direction: dir animated: YES completion: nil];
}
然后跟踪currentViewController在UIPageViewControllerDelegate方法：pageViewController：willTransitionToViewControllers：和pageViewController：didFinishAnimating：previousViewControllers：transitionCompleted： 。
- (nullable UIViewController *) pageViewController: (UIPageViewController *) pageViewController viewControllerBeforeViewController: (UIViewController *) viewController {
NSInteger idx = [self.viewControllers indexOfObject: viewController];
if (idx > 0) {
return self.viewControllers[idx - 1];
} else {
return nil;
}
}
- (nullable UIViewController *) pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController: (UIViewController *) viewController {
NSInteger idx = [self.viewControllers indexOfObject: viewController];
if (idx == NSNotFound) {
return nil;
} else {
if (idx + 1 < self.viewControllers.count) {
return self.viewControllers[idx + 1];
} else {
return nil;
}
}
}
- (void) pageViewController:(UIPageViewController *)pageViewController willTransitionToViewControllers:(NSArray<UIViewController *> *)pendingViewControllers {
self.nextViewController = [pendingViewControllers firstObject];
}
- (void)pageViewController:(UIPageViewController *)pageViewController didFinishAnimating:(BOOL)finished previousViewControllers:(NSArray<UIViewController *> *)previousViewControllers transitionCompleted:(BOOL)completed {
if (completed) {
self.currentViewController = self.nextViewController;
}
}最后，在您选择的方法中（在下面的示例中为-（IBAction）onNext：（id）sender），您可以使用UIPageViewControllerDataSouce方法pageViewController：viewControllerBeforeViewController：，pageViewController：viewControllerAfterViewController：以编程方式切换到下一个或上一个控制器下一个或上一个视图控制器，并通过调用[self.pageViewController setViewControllers：@ [vc]方向：UIPageViewControllerNavigationDirectionForward动画：是完成：无]导航到该控制器
- (void) onNext {
UIViewController *vc = [self pageViewController: self.tutorialViewController viewControllerAfterViewController: self.currentViewController];
if (vc != nil) {
self.currentViewController = vc;
[self.tutorialViewController setViewControllers: @[vc] direction: UIPageViewControllerNavigationDirectionForward animated: YES completion: nil];
}
}
由于ViewControllers嵌入在PageViewController中，因此您要做的就是：
Xamarin中的示例，但在功能上与Swift等类似。以下代码将显示在一个ViewControllers中的Button Click委托中，显示为页面：
var parent = ParentViewController as WelcomePageViewController;
var next = parent.DataSource.GetNextViewController(parent, this);
parent.SetViewControllers(new UIViewController[] { next }, UIPageViewControllerNavigationDirection.Forward, true, null);