ios课程lwxshow.com-PDF UIPageViewController实现翻页浏览

ios教程lwxshow.com-PDF UIPageViewController实现翻页浏览

转自:http://lwxshow.com/ios-page-tutorial-lwxshow-com-pdf-uipageviewcontroller-achieved-browse

 

参见上一篇文章:ios教程lwxshow.com-PDF的显示和浏览

UIPageViewController实现翻页浏览

- (PDFViewController *)viewControllerAtIndex:(NSUInteger)index 
{
    //Return the PDFViewController for the given index.
    if (([self.pagePDF count] == 0 )|| (index > [self.pagePDF count]) ) {
        return nil;
    }

    //Create a new view controller and pass suitable data.
    PDFViewController *dataViewController = [[PDFViewController alloc]initWithNibName:@"PDFViewController" bundle:nil];
    //dataViewController.pdfview = [self.pagePDF objectAtIndex:index];
    dataViewController.pdfview = [[PDFView alloc]initWithFrame:self.view.frame atPage:index];
    [dataViewController.view addSubview:dataViewController.pdfview];
    NSLog(@"index = %d",index);
    return dataViewController;
}

- (NSUInteger) indexOfViewController:(PDFViewController *)viewController
{
    return [self.pagePDF indexOfObject:viewController.pdfview];
}

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController
{
    NSUInteger index = [self indexOfViewController:(PDFViewController *)viewController];
    if ((index == 0 ) || (index == NSNotFound)){
        return nil;
    }

    index--;
    return  [self viewControllerAtIndex:index];
}

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController
{
    NSUInteger index = [self indexOfViewController:(PDFViewController *)viewController];
    if (index == NSNotFound)
    {
        return nil;
    }

    index++;

    if (index == [self.pagePDF count]){
        return  nil;
    }

    return [self viewControllerAtIndex:index];
}

 

效果如下: