Ну, вот длинный ответ, который вы сможете скопировать и вставить.(Этот код был адаптирован Эрикой Садун (https://github.com/erica/iOS-5-Cookbook))
). Сначала создайте новый класс типа UIPageViewController. Назовите его BookController. Теперь вставьте следующий код в ваш файл .h.
// Used for storing the most recent book page used
#define DEFAULTS_BOOKPAGE @"BookControllerMostRecentPage"
@protocol BookControllerDelegate <NSObject>
- (id) viewControllerForPage: (int) pageNumber;
@optional
- (void) bookControllerDidTurnToPage: (NSNumber *) pageNumber;
@end
@interface BookController : UIPageViewController <UIPageViewControllerDelegate, UIPageViewControllerDataSource>
+ (id) bookWithDelegate: (id) theDelegate;
+ (id) rotatableViewController;
- (void) moveToPage: (uint) requestedPage;
- (int) currentPage;
@property (assign) id <BookControllerDelegate> bookDelegate;
@property (nonatomic, assign) uint pageNumber;
ив вашем файле .m:
#define IS_IPHONE ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone)
#define SAFE_ADD(_Array_, _Object_) {if (_Object_ && [_Array_ isKindOfClass:[NSMutableArray class]]) [pageControllers addObject:_Object_];}
#define SAFE_PERFORM_WITH_ARG(THE_OBJECT, THE_SELECTOR, THE_ARG) (([THE_OBJECT respondsToSelector:THE_SELECTOR]) ? [THE_OBJECT performSelector:THE_SELECTOR withObject:THE_ARG] : nil)
#pragma Utility Class - VC that Rotates
@interface RotatableVC : UIViewController
@end
@implementation RotatableVC
- (void) loadView
{
[super loadView];
self.view.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
self.view.backgroundColor = [UIColor whiteColor];
}
- (BOOL) shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
{
return YES;
}
@end
#pragma Book Controller
@implementation BookController
@synthesize bookDelegate, pageNumber;
#pragma mark Debug / Utility
- (int) currentPage
{
int pageCheck = ((UIViewController *)[self.viewControllers objectAtIndex:0]).view.tag;
return pageCheck;
}
#pragma mark Page Handling
// Update if you'd rather use some other decision style
- (BOOL) useSideBySide: (UIInterfaceOrientation) orientation
{
BOOL isLandscape = UIInterfaceOrientationIsLandscape(orientation);
return isLandscape;
}
// Store the new page and update the delegate
- (void) updatePageTo: (uint) newPageNumber
{
pageNumber = newPageNumber;
[[NSUserDefaults standardUserDefaults] setInteger:pageNumber forKey:DEFAULTS_BOOKPAGE];
[[NSUserDefaults standardUserDefaults] synchronize];
SAFE_PERFORM_WITH_ARG(bookDelegate, @selector(bookControllerDidTurnToPage:), [NSNumber numberWithInt:pageNumber]);
}
// Request controller from delegate
- (UIViewController *) controllerAtPage: (int) aPageNumber
{
if (bookDelegate &&
[bookDelegate respondsToSelector:@selector(viewControllerForPage:)])
{
UIViewController *controller = [bookDelegate viewControllerForPage:aPageNumber];
controller.view.tag = aPageNumber;
return controller;
}
return nil;
}
// Update interface to the given page
- (void) fetchControllersForPage: (uint) requestedPage orientation: (UIInterfaceOrientation) orientation
{
BOOL sideBySide = [self useSideBySide:orientation];
int numberOfPagesNeeded = sideBySide ? 2 : 1;
int currentCount = self.viewControllers.count;
uint leftPage = requestedPage;
if (sideBySide && (leftPage % 2)) leftPage--;
// Only check against current page when count is appropriate
if (currentCount && (currentCount == numberOfPagesNeeded))
{
if (pageNumber == requestedPage) return;
if (pageNumber == leftPage) return;
}
// Decide the prevailing direction by checking the new page against the old
UIPageViewControllerNavigationDirection direction = (requestedPage > pageNumber) ? UIPageViewControllerNavigationDirectionForward : UIPageViewControllerNavigationDirectionReverse;
[self updatePageTo:requestedPage];
// Update the controllers
NSMutableArray *pageControllers = [NSMutableArray array];
SAFE_ADD(pageControllers, [self controllerAtPage:leftPage]);
if (sideBySide)
SAFE_ADD(pageControllers, [self controllerAtPage:leftPage + 1]);
[self setViewControllers:pageControllers direction: direction animated:YES completion:nil];
}
// Entry point for external move request
- (void) moveToPage: (uint) requestedPage
{
[self fetchControllersForPage:requestedPage orientation:(UIInterfaceOrientation)[UIDevice currentDevice].orientation];
}
#pragma mark Data Source
- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController
{
[self updatePageTo:pageNumber + 1];
return [self controllerAtPage:(viewController.view.tag + 1)];
}
- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController
{
[self updatePageTo:pageNumber - 1];
return [self controllerAtPage:(viewController.view.tag - 1)];
}
#pragma mark Delegate
- (UIPageViewControllerSpineLocation)pageViewController:(UIPageViewController *)pageViewController spineLocationForInterfaceOrientation:(UIInterfaceOrientation)orientation
{
NSUInteger indexOfCurrentViewController = 0;
if (self.viewControllers.count)
indexOfCurrentViewController = ((UIViewController *)[self.viewControllers objectAtIndex:0]).view.tag;
[self fetchControllersForPage:indexOfCurrentViewController orientation:orientation];
BOOL sideBySide = [self useSideBySide:orientation];
self.doubleSided = sideBySide;
UIPageViewControllerSpineLocation spineLocation = sideBySide ? UIPageViewControllerSpineLocationMid : UIPageViewControllerSpineLocationMin;
return spineLocation;
}
-(void)dealloc{
self.bookDelegate = nil;
}
#pragma mark Class utility routines
// Return a UIViewController that knows how to rotate
+ (id) rotatableViewController
{
UIViewController *vc = [[RotatableVC alloc] init];
return vc;
}
// Return a new book
+ (id) bookWithDelegate: (id) theDelegate
{
BookController *bc = [[BookController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStylePageCurl navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:nil];
bc.dataSource = bc;
bc.delegate = bc;
bc.bookDelegate = theDelegate;
return bc;
}
Этот класс теперь можно использовать для управления любой книгой, которую вы создаете в любом проекте, и для нескольких книг в одном проекте. Для каждой книги создайте делегат UIPageViewController с@interface:
@interface NameOfBookController : UIPageViewController <BookControllerDelegate>
В файле .m этого делегата включите:
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView
{
[super loadView];
CGRect appRect = [[UIScreen mainScreen] applicationFrame];
self.view = [[UIView alloc] initWithFrame: appRect];
self.view.backgroundColor = [UIColor whiteColor];
self.view.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
// Establish the page view controller
bookController = [BookController bookWithDelegate:self];
bookController.view.frame = (CGRect){.size = appRect.size};
}
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
// Add the child controller, and set it to the first page
[self.view addSubview:bookController.view];
[self addChildViewController:bookController];
[bookController didMoveToParentViewController:self];
}
Затем добавьте:
- (id) viewControllerForPage: (int) pageNumber
{
// Establish a new controller
UIViewController *controller;
switch (pageNumber) {
case 0:
view1 = [[FirstViewController alloc] init];
view1.view.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
controller = view1;
//rinse and repeat with each new view controller
break;
case 1:
//etc.
break;
default:
return nil;
break;
}
return controller;
}
Для записи этот кодне безопасен для памяти. Если вы используете ARC, добавьте свой @autoreleasePool {}, если нет, не забудьте про цикл сохранения / выпуска.
Надеюсь, это поможет!