Ios 是否可以在UIPageViewController中以编程方式翻页?
是否可以在Ios 是否可以在UIPageViewController中以编程方式翻页?,ios,ios5,uikit,uipageviewcontroller,Ios,Ios5,Uikit,Uipageviewcontroller,是否可以在UIPageViewController中以编程方式翻页?是的,可以使用以下方法: - (void)setViewControllers:(NSArray *)viewControllers direction:(UIPageViewControllerNavigationDirection)direction animated:(BOOL)animated completion
UIPageViewController
中以编程方式翻页?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时使用的方法相同。类似地,您可以使用它转到其他页面
想知道为什么viewControllers
是一个数组,而不是一个视图控制器
这是因为页面视图控制器可以有一个“脊椎”(就像在iBooks中一样),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元素数组
Swift中的一个示例:
pageContainer.setViewControllers([displayThisViewController], direction: .Forward, animated: true, completion: nil)
因为我也需要这个,所以我将更详细地介绍如何做到这一点 注意:我假设您使用标准模板表单来生成
UIPageViewController
结构,该结构在调用时创建了modelViewController
和dataViewController
。如果您不理解我写的内容,请返回并创建一个以UIPageViewController
为基础的新项目。那你就明白了
因此,需要切换到特定页面需要设置上面列出的各种方法。在本练习中,我假设它是一个带有两个视图的横向视图。此外,我将其实现为iAction,这样就可以通过按按钮或其他方式来完成操作-只需调用选择器并传入所需的项即可
因此,在本例中,您需要显示两个视图控制器,并且可以选择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,并使用向前滑动。
从这里你可以看到,你所需要做的就是传入变量,这些变量将帮助你获得这些项目
-(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!
}
这个代码对我很有效,谢谢 这就是我用它做的。一些前进或后退的方法和一个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];
}
}
-(iAction)页面转到:(id)发件人{
//获取要转到的页面
nsuto=4;
//获取当前页面的当前索引
DataViewController*theCurrentViewController=[self.pageViewController.ViewController对象索引:0];
nsInteger RetrievedIndex=[self.modelController索引xOfViewController:CurrentViewController];
//获取要转到的页面
DataViewController*targetPageViewController=[self.modelController视图控制器索引:(PageToToTo-1)情节提要:self.storyboard];
DataViewController*secondPageViewController=[self.modelController视图控制器索引:(PageToToTo)情节提要:self.storyboard];
//将其(如果在横向视图中,则将其放置在阵列中)
NSArray*视图控制器=零;
ViewControllers=[NSArray阵列,其中包含对象:targetPageViewController,secondPageViewController,nil];
//检查要设置翻页动画的方向,然后相应地翻页
如果(检索索引<(第页至-1)和检索索引!=(第页至-1)){
[self.pageViewController设置viewcontrollers:theviewcontrollerdirection:UIPageViewControllerNavigationDirectionForward-animated:YES-completion:NULL];
}
如果(retrievedIndex>(pageToGoTo-1)和&retrievedIndex!=(pageToGoTo-1)){
[self.pageViewController设置viewcontrollers:theviewcontrollerdirection:UIPageViewControllerNavigationDirectionReverse-animated:YES-completion:NULL];
}
}
-(iAction)pageFoward:(id)发件人{
//获取当前页面的当前索引
DataViewController*theCurrentViewController=[self.pageViewController.ViewController对象索引:0];
nsInteger RetrievedIndex=[self.modelController索引xOfViewController:CurrentViewController];
//检查当前页面是否不是第一页
如果(检索索引<5){
//获取要转到的页面
DataViewController*targetPageViewController=[self.modelController-viewControllerAtIndex:(retreivedIndex+1)情节提要:self.storyboard];
//将其(如果在横向视图中,则将其放置在阵列中)
NSArray*视图控制器=零;
viewcontrollers=[NSArray数组及其对象:targetPageViewController,nil];
//添加页面视图
[self.pageViewController设置viewcontrollers:theviewcontrollerdirection:UIPageViewControllerNavigationDirectionForward-animated:YES-completion:NULL];
}
}
-(iAction)回页:(id)发件人{
//获取当前页面的当前索引
DataViewController*theCurrentViewController=[self.pageViewController.ViewController对象索引:0];
nsInteger RetrievedIndex=[self.modelController索引xOfViewController:CurrentViewController];
//检查当前页面是否不是第一页
如果(检索索引>0){
//获取要转到的页面
DataViewController*targetPageViewController=[self.modelController视图控制器索引:(retreivedIndex-1)情节提要:self.storyboard];
//将其(如果在横向视图中,则将其放置在阵列中)
NSArray*视图控制器=零;
viewcontrollers=[NSArray数组及其对象:targetPageViewController,nil];
//添加页面视图
[self.pageViewController设置viewcontrollers:theviewcontrollerdirection:UIPageViewControllerNavigationDirectionReverse-animated:YES-completion:NULL];
}
}
但是,使用此“self.pageViewController setViewControllers”方法调用不会为已关闭的页面在viewController上调用“viewdissapear”,而手动翻页会在已关闭的页面上调用viewdissapear。我相信这就是我坠机的原因
“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”我还需要一个按钮在PageViewController上向左导航,该按钮
- (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];
}
}
setViewControllers:array
- (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];
}
[self changePage:UIPageViewControllerNavigationDirectionReverse];
[self changePage:UIPageViewControllerNavigationDirectionForward];
1 - rootViewController;
2 - model;
3 - viewControllers
3.1 - VC1;
3.2 - VC2;
3.3 - VC3.
Note: all of VCs has Storyboard ID.
#import <UIKit/UIKit.h>
#import "Model.h"
@interface VC1 : UIViewController
@property (nonatomic, strong) UIPageViewController *thePageViewController;
@property (nonatomic, strong) SeuTimePagesModel *theModel;
@end
- (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;
}
- (IBAction)go:(id)sender
{
VC2 *vc2 = [_model.pages objectAtIndex:1];
NSArray *viewControllers = @[vc2];
[_pageViewController setViewControllers:viewControllers
direction:UIPageViewControllerNavigationDirectionForward
animated:YES
completion:nil];
}
- (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];
}
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
}
}
}
-(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];
}
UIViewController *controller = [pageViewController.dataSource pageViewController:self.pageViewController viewControllerAfterViewController:pageViewController.viewControllers.firstObject];
[pageViewController setViewControllers:@[controller] direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:nil];
//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];
}
- (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;
}
-(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;}
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)
}
}
}
}
- (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];
}
let pageController = self.parent as! PageViewController
pageController.setViewControllers([parentVC.orderedViewControllers[1]], direction: .forward, animated: true, completion: nil)
pageController.pageControl.currentPage = 1
...
@property (nonatomic, strong) UIViewController *currentViewController;
@property (nonatomic, strong) UIViewController *nextViewController;
...
- (void) viewDidLoad {
[super viewDidLoad];
...
self.currentViewController = self.viewControllers[0];
...
[self.pageViewController setViewControllers: @[self.currentViewController] direction: dir animated: YES completion: nil];
}
- (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;
}
}
- (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];
}
}
var parent = ParentViewController as WelcomePageViewController;
var next = parent.DataSource.GetNextViewController(parent, this);
parent.SetViewControllers(new UIViewController[] { next }, UIPageViewControllerNavigationDirection.Forward, true, null);