将(垂直)UIPageViewController嵌套在另一个(水平)UIPageViewcontroller中

Question

我的问题很严重UIPageViewController.我想使用部分和子部分在我的应用程序中显示内容.所以,我创建了"两个"实例UIPageViewController- 水平(红色)和垂直(蓝色):

之前我说过我已经创建了"两个"实例 - 这不是真的 - 可能有几十个实例,但同时只有两个实例,你知道我的意思.两个控制器都transitionStyle设置为UIPageViewControllerTransitionStyleScroll.

红色UIPageViewController负责部分之间的水平滚动,蓝色负责垂直滚动.

它们在分开时都可以工作,但是当我将垂直放置UIPageViewController在水平方向时,垂直方向会停止工作.

我的代码如下:

---

横向UIPageViewController创作

self.mainPageViewController = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:@{UIPageViewControllerOptionInterPageSpacingKey:[NSNumber numberWithFloat:0]}];
self.mainPageViewController.dataSource = self;
self.mainPageViewController.delegate = self;

self.pdfDocsURLs = @[ @{@"v":[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"1v" ofType:@"pdf"]],
                        @"h":[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"1h" ofType:@"pdf"]]},

                      @{@"v":[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"2v" ofType:@"pdf"]],
                        @"h":[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"2h" ofType:@"pdf"]]},

                      @{@"v":[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"3v" ofType:@"pdf"]],
                        @"h":[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"3h" ofType:@"pdf"]]}];

UIIndexedPageViewController *pvc = [[UIIndexedPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationVertical options:@{UIPageViewControllerOptionInterPageSpacingKey:[NSNumber numberWithFloat:0]}];
pvc.index = 1;
PDFDocument *vdoc = [[PDFDocument alloc] initWithPDFFileURL:self.pdfDocsURLs[0][@"v"] password:nil];
PDFDocument *hdoc = [[PDFDocument alloc] initWithPDFFileURL:self.pdfDocsURLs[0][@"h"] password:nil];
PDFSinglePageViewController *svc = [[PDFSinglePageViewController alloc] initWithVerticalPDF:vdoc horizontalPDF:hdoc page:1];
[pvc setViewControllers:@[svc] direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:nil];

[self.mainPageViewController setViewControllers:@[pvc] direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:nil];

需要明确的UIIndexedPageViewController是,UIPVC的子类具有额外的NSUInteger index属性.它的实现是空的 - 它不会覆盖任何方法.

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UIPageViewController dataSource方法

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController {
    if(pageViewController == self.mainPageViewController) { // if horizontal
        UIIndexedPageViewController *ivc = (UIIndexedPageViewController *)viewController;
        if(ivc.index == self.pdfDocsURLs.count) return nil;
        UIIndexedPageViewController *pvc = [[UIIndexedPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationVertical options:@{UIPageViewControllerOptionInterPageSpacingKey:[NSNumber numberWithFloat:0]}];
        pvc.index = ivc.index+1;
        PDFDocument *vdoc = [[PDFDocument alloc] initWithPDFFileURL:self.pdfDocsURLs[ivc.index][@"v"] password:nil];
        PDFDocument *hdoc = [[PDFDocument alloc] initWithPDFFileURL:self.pdfDocsURLs[ivc.index][@"h"] password:nil];
        PDFSinglePageViewController *svc = [[PDFSinglePageViewController alloc] initWithVerticalPDF:vdoc horizontalPDF:hdoc page:1];
        [pvc setViewControllers:@[svc] direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:nil];
        return pvc;
    } else { // if vertical - THE CODE BELOW IS NEVER EXECUTED
        PDFSinglePageViewController *ovc = (PDFSinglePageViewController *)viewController;
        NSUInteger nop = 0;
        if(UIInterfaceOrientationIsPortrait(ovc.interfaceOrientation)) nop = ovc.verticalDoc.numberOfPages;
        else if(UIInterfaceOrientationIsLandscape(ovc.interfaceOrientation)) nop = ovc.horizontalDoc.numberOfPages;
        if(ovc.page == nop) return nil;
        PDFSinglePageViewController *svc = [[PDFSinglePageViewController alloc] initWithVerticalPDF:ovc.verticalDoc horizontalPDF:ovc.horizontalDoc page:ovc.page+1];
        return svc;
    }
}

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController {
    if(pageViewController == self.mainPageViewController) { // if horizontal
        UIIndexedPageViewController *ivc = (UIIndexedPageViewController *)viewController;
        if(ivc.index == 1) return nil;
        UIIndexedPageViewController *pvc = [[UIIndexedPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationVertical options:@{UIPageViewControllerOptionInterPageSpacingKey:[NSNumber numberWithFloat:0]}];
        pvc.index = ivc.index-1;
        PDFDocument *vdoc = [[PDFDocument alloc] initWithPDFFileURL:self.pdfDocsURLs[ivc.index-2][@"v"] password:nil];
        PDFDocument *hdoc = [[PDFDocument alloc] initWithPDFFileURL:self.pdfDocsURLs[ivc.index-2][@"h"] password:nil];
        PDFSinglePageViewController *svc = [[PDFSinglePageViewController alloc] initWithVerticalPDF:vdoc horizontalPDF:hdoc page:1];
        [pvc setViewControllers:@[svc] direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:nil];
        return pvc;
    } else { // is vertical - THE CODE BELOW IS NEVER EXECUTED
        PDFSinglePageViewController *ovc = (PDFSinglePageViewController *)viewController;
        NSUInteger nop = 0;
        if(UIInterfaceOrientationIsPortrait(ovc.interfaceOrientation)) nop = ovc.verticalDoc.numberOfPages;
        else if(UIInterfaceOrientationIsLandscape(ovc.interfaceOrientation)) nop = ovc.horizontalDoc.numberOfPages;
        if(ovc.page == 1) return nil;
        PDFSinglePageViewController *svc = [[PDFSinglePageViewController alloc] initWithVerticalPDF:ovc.verticalDoc horizontalPDF:ovc.horizontalDoc page:ovc.page-1];
        return svc;
    }
}

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所以似乎水平UIPageViewController不允许垂直的人甚至接收平移手势识别器.

---

我的问题是......有没有办法让垂直方向UIPageViewController接收触摸并向两个方向滚动？

任何帮助,将不胜感激.

Answer 1

我忘记分配dataSource我delegate的垂直页面视图控制器的属性

• -pageViewController:viewControllerBeforeViewController:
• -pageViewController:viewControllerAfterViewController:

问题解决了，一切都很顺利。