我的UIPageViewController. 我想使用部分和子部分在我的应用程序中呈现内容。所以，我创建了“两个”实例UIPageViewController- 水平（红色）和垂直（蓝色）：
之前我说过我创建了“两个”实例——这并不完全正确——可能有数十个实例，但同时只呈现了 2 个，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在水平位置时，垂直的会停止工作。
我的代码如下所示：
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，它是 UIPVC 的一个子类，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。
UIPageViewController数据源方法
- (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;
}
}
所以似乎水平UIPageViewController不允许垂直甚至接收平移手势识别器。
我的问题是......有没有办法让垂直UIPageViewController接收触摸并在两个方向滚动？
任何帮助，将不胜感激。