我如何使用UIPageViewController加载单独的XIB？
我正在钻研UIPageViewControllers的新世界，并且有很多教程，但是它们都似乎创建了一个视图，然后只是使用不同内容的新实例。
我真的很希望能够创建多个XIB，然后将它们与UIPageViewController链接在一起，但这太新了，我无法理解它的工作方式。
那么，这是一个很长的答案，你应该能够复制和粘贴。 （此代码是从Erica Sadun（https://github.com/erica/iOS-5-Cookbook）改编的）
首先，创建一个类型为UIPageViewController的新类。 称它为BookController。 现在将以下代码粘贴到.h文件中。
// 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;
并在您的.m文件中：
#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;
}
现在可以使用此类来控制您在任何项目中创建的任何书籍以及单个项目中的多本书籍。 对于每本书，使用@interface创建一个委托UIPageViewController：
@interface NameOfBookController : UIPageViewController <BookControllerDelegate>
在此代理的.m文件中，包括：
// 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];
}
然后加：
- (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;
}
为了记录，此代码不是内存安全的。 如果使用ARC，请添加@autoreleasePool {}; 如果没有，不要忘记你的保留/释放周期。
我希望这有帮助！
本文展示了如何使用UIPageViewController和每个页面的自定义viewcontroller创建一个应用程序：http://www.informit.com/articles/article.aspx?p=1760500&seqNum=6
链接地址: http://www.djcxy.com/p/57567.html上一篇: How do I use UIPageViewController to load separate XIBs?