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iOS：UIPageViewController-ボタンを使用して次のページにジャンプします

PageViewControllerには、ユーザーが指で左から右にナビゲートする一連のVCがあります。指でスワイプするのと基本的に同じアクションを実行するボタンを追加する必要があります。VCを介して左右に1つずつ移動します。これどうやってするの？現在、次の2つの方法を使用して、ユーザーがスワイプしたときにVCを動的に設定しています。

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

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

ユーザーがボタンをクリックした場合、どういうわけか私は同じことをすることができますか？

iosuibuttonuipageviewcontroller
8
user2563044

ページビューコントローラのsetViewControllers:direction:animated:completion:を使用して、現在表示されているビューコントローラをトランジションアニメーションでプログラムで設定できます。

これは、ランダムな背景色でビューコントローラーを表示する例です。これを調整して、特定のViewControllerを使用できます。

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.pvc = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:nil];
    self.pvc.view.frame = CGRectInset(self.view.bounds, 200, 200);
    [self.view addSubview:self.pvc.view];

    [self.pvc setViewControllers:@[[self randomVC]] direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:nil];
}

-(UIViewController*)randomVC
{
    UIViewController *vc = [[UIViewController alloc] init];
    UIColor *color = [UIColor colorWithRed:arc4random_uniform(255)/255.0 green:arc4random_uniform(255)/255.0 blue:arc4random_uniform(255)/255.0 alpha:1];
    vc.view.backgroundColor = color;
    return vc;
}

- (IBAction)previousButtonPressed:(id)sender {
    [self.pvc setViewControllers:@[[self randomVC]] direction:UIPageViewControllerNavigationDirectionReverse animated:YES completion:nil];
}

- (IBAction)nextButtonPressed:(id)sender {
    [self.pvc setViewControllers:@[[self randomVC]] direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:nil];
}
11
MJN

追加されたボタンでページをナビゲートできます（前へ、次へ）およびページコントロールがオンの場合スワイプの場合。以下を通過してください：

//Set Delegate & Data Source for PageView controller [Say in View Did Load]
   self.pageViewController.dataSource = self;
   self.pageViewController.delegate = self;



// PageBefore & After When User Scroll to move next or previous page 

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

    [_nextBtn setTitle:@"Next" forState:UIControlStateNormal];

    NSUInteger index = ((PageContentViewController*) viewController).pageIndex;

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

    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;
}


if (index < 3)
{
    index++;
}else
{
    return nil;
}
return [self viewControllerAtIndex:index];}

//To Match Exact Index page view when scrolled & navigated using button action. Place button index when page is been translated.



 - (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;
}
}

//前へ、次へボタンアクション

-(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)nextBtnAction:(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
-(NSInteger)presentationCountForPageViewController:(UIPageViewController *)pageViewController{
    return [self.pageImages count];}

-(NSInteger)presentationIndexForPageViewController:(UIPageViewController *)pageViewController{
    return  buttonIndex;}
0
Yogesh Lolusare