是否可以以编程方式翻页UIPageViewController？
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116959 次
17 回答
248
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的方法相同。类似地，您可以使用它转到其他页面。
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有一个“脊椎”（就像在 iBooks 中一样），一次显示 2 页内容。如果您一次显示 1 页内容，则只需传入一个 1 元素数组。
斯威夫特的一个例子：
pageContainer.setViewControllers([displayThisViewController], direction: .Forward, animated: true, completion: nil)
于 2011-08-30T08:45:32.093 回答
37
由于我也需要这个，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表单来生成您的UIPageViewController结构 -当您调用它时，它同时具有modelViewController和创建。dataViewController如果您不理解我写的内容，请返回并创建一个UIPageViewController以此为基础的新项目。到时候你就明白了。
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。对于这个练习，我假设它是一个显示两个视图的横向视图。 此外，我将其实现为 IBAction，以便可以通过按下按钮或其他方式来完成 - 使其选择器调用并传递所需的项目同样容易。
因此，对于这个示例，您需要两个将显示的视图控制器 - 并且可以选择，无论您是在书中前进还是后退。
请注意，我只是硬编码到第 4 页和第 5 页的位置并使用前滑。从这里您可以看到，您需要做的就是传递有助于您获取这些项目的变量......
-(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!
}
于 2011-11-04T21:43:31.543 回答
31
这是单页视图的另一个代码示例。此处省略了viewControllerAtIndex的实现，它应该为给定的索引返回正确的视图控制器。
- (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];
}
页面可以通过调用来改变
[self changePage:UIPageViewControllerNavigationDirectionReverse];
[self changePage:UIPageViewControllerNavigationDirectionForward];
于 2014-04-11T11:10:26.997 回答
25
我可能在这里完全遗漏了一些东西，但这个解决方案似乎比许多其他人提出的要简单得多。
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)
}
}
}
}
于 2017-03-30T00:07:04.133 回答
15
这段代码对我来说很好用，谢谢。
这就是我所做的。一些用于前进或后退的方法，以及一种用于直接进入特定页面的方法。它适用于纵向视图中的 6 页文档。如果将其粘贴到 pageViewController 模板的 RootController 的实现中，它将正常工作。
-(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];
}
}
于 2011-12-30T10:11:39.020 回答
10
斯威夫特 4：
当我在 pagecontroller 视图控制器上点击 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和最直接的解决方案：
let pageController = self.parent as! PageViewController
pageController.setViewControllers([parentVC.orderedViewControllers[1]], direction: .forward, animated: true, completion: nil)
pageController.pageControl.currentPage = 1
于 2018-02-08T13:00:40.807 回答
5
使用数据源中的方法怎么样？
UIViewController *controller = [pageViewController.dataSource pageViewController:self.pageViewController viewControllerAfterViewController:pageViewController.viewControllers.firstObject];
[pageViewController setViewControllers:@[controller] direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:nil];
类比为倒退。
于 2015-10-09T16:18:19.580 回答
3
但是，使用此“self.pageViewController setViewControllers”方法调用不会在已关闭页面的 viewController 上调用“viewDidDissapear”，而手动翻页确实会在已关闭页面上调用 viewDidDissapear。我相信这是我崩溃的原因
“提供的视图控制器数量 (0) 与请求的转换所需的数量 (1) 不匹配”
于 2012-09-21T11:52:43.133 回答
3
在斯威夫特：
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
}
}
}
于 2015-06-06T17:53:45.837 回答
2
我还需要一个按钮来在 PageViewController 上向左导航，它应该完全符合您对滑动动作的期望。
由于我已经在“ pageViewController:viewControllerBeforeViewController ”中设置了一些规则来处理自然滑动导航，我希望按钮重新使用所有代码，并且根本无法像以前那样使用特定索引来访问页面答案确实如此。所以，我不得不采取另一种解决方案。
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，并且其脊椎设置为 mid。
这是我为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];
}
}
你可以做一些非常相似的事情来从这里制作一个正确的导航按钮。
于 2013-02-10T21:06:53.080 回答
2
如果PAGE CONTROL 指示当前页面是 O && 您希望页面通过滚动导航 & 也可以通过单击 Page ViewController 中的自定义按钮，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，委托调用 viewControllerAfterViewController
- (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;}
于 2016-08-28T10:17:02.037 回答
2
- (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];
}
//现在调用这个方法
[自我移动到页面];
我希望它有效:)
于 2017-09-19T09:23:18.773 回答
1
对于单页，我刚刚编辑了@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];
}
于 2015-06-27T09:15:31.620 回答
0
正如@samwize 指出的那样，分页的方式是使用
setViewControllers:array
这是我的做法：我的数据源和委托是分开的。您可以调用此方法并且只更改“下一个”视图。以前您必须应用分页规则。也就是说，您必须检查方向和下一个控制器。如果您将该方法与您的自定义数据源一起使用，那么您正在显示的控制器数组不会改变（因为您将在 NSObject 子类上使用自定义数组）。
使用您自己的数据源，该方法只是设置一个新视图（具有特定方向）。由于您仍将控制正常滑动时将显示的页面。
于 2014-03-20T08:15:15.193 回答
0
我从昨天开始就在研究它，我终于做到了。我不能完全使用标准模板，因为我有三个不同的视图控制器作为子视图：
1 - rootViewController;
2 - model;
3 - viewControllers
3.1 - VC1;
3.2 - VC2;
3.3 - VC3.
Note: all of VCs has Storyboard ID.
我只在第一个 VC 中需要一个触发按钮，所以我为 pageViewController 和模型添加了一个属性：
#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，所以我可以将它们设置为我的 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，我在我的 vc1 中添加了一个 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 VCs 索引，我的按钮将我带到我的第二个 VC，但它并不难获得所有索引，并跟踪你的 childviews：
- (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];
}
我希望它可以帮助你！
于 2014-06-10T00:41:00.563 回答
0
这是使用UIPageViewControllerDataSource方法的解决方案：
该代码跟踪UIPageViewController中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];
}
然后在UIPageViewControllerDelegate方法中跟踪currentViewController ： 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（在下面的示例中是- (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] direction: UIPageViewControllerNavigationDirectionForward animated: YES completion: nil] 导航到它；
- (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];
}
}
于 2019-04-11T13:28:34.007 回答
0
由于 ViewController 嵌入在 PageViewController 中，您所要做的就是：
- 检索父视图控制器并转换为您的相关类。
- 使用该父数据源属性来获取下一个 ViewController。
- 使用 SetParentViewControllers 方法设置并转换到下一页。
Xamarin 中的示例，但功能类似于 Swift 等。以下代码将位于其中一个 ViewController 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);
于 2020-01-29T09:08:51.380 回答