我想知道如何实现会影响 UIPageViewController 模型的按钮。例如，我希望我的 UIPageViewController 模型数组在其中加载单个对象，当点击按钮时，将添加一个新的视图控制器，并自动翻转页面或类似的东西（如在 Notes 应用程序中）。删除用户正在查看的当前对象也是如此。
到目前为止，我尝试通过对我的根视图控制器实现一些 IBActions，但到目前为止还没有运气。
这是我实现 ViewController 类的方法：
@implementation ViewController
@synthesize modelArray = _modelArray;
@synthesize pageVC = _pageVC;
#pragma mark - UIPageViewControllerDataSource Methods
// Returns the view controller before the given view controller. (required)
- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController
viewControllerBeforeViewController:(UIViewController *)viewController
{
NSUInteger currentIndex = [self.modelArray indexOfObject:[(ContentVC *)viewController labelContents]];
if(currentIndex==0)
return nil;
ContentVC *cVC = [[ContentVC alloc] init];
cVC.labelContents = [self.modelArray objectAtIndex:currentIndex-1];
return cVC;
}
// Returns the view controller after the given view controller. (required)
- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController
viewControllerAfterViewController:(UIViewController *)viewController
{
NSUInteger currentIndex = [self.modelArray indexOfObject:[(ContentVC *)viewController labelContents]];
if(currentIndex==self.modelArray.count-1)
return nil;
ContentVC *cVC = [[ContentVC alloc] init];
cVC.labelContents = [self.modelArray objectAtIndex:currentIndex+1];
return cVC;
}
#pragma mark - UIPageViewControllerDelegate Methods
// Returns the spine location for the given orientation.
- (UIPageViewControllerSpineLocation)pageViewController:(UIPageViewController *)pageViewController
spineLocationForInterfaceOrientation:(UIInterfaceOrientation)orientation
{
if(UIInterfaceOrientationIsPortrait(orientation)){
// Set the array with only 1 view controller
UIViewController *currentVC = [self.pageVC.viewControllers objectAtIndex:0];
NSArray *viewControllers = [NSArray arrayWithObject:currentVC];
[self.pageVC setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:nil];
// Set the doubleSided property to NO
self.pageVC.doubleSided = NO;
// Return the spine location
return UIPageViewControllerSpineLocationMin;
} else { // if landscape
NSArray *viewControllers = nil;
ContentVC *currentVC = [self.pageVC.viewControllers objectAtIndex:0];
NSUInteger currentIndex = [self.modelArray indexOfObject:[(ContentVC *)viewControllers labelContents]];
if(currentIndex==0 || currentIndex %2 == 0){
UIViewController *nextViewController = [self pageViewController:self.pageVC viewControllerAfterViewController:currentVC];
viewControllers = [NSArray arrayWithObjects:currentVC, nextViewController, nil];
} else {
UIViewController *previousVC = [self pageViewController:self.pageVC viewControllerBeforeViewController:currentVC];
viewControllers = [NSArray arrayWithObjects:previousVC, currentVC, nil];
}
// Set the view controllers as property of the UIPageViewController
[self.pageVC setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:nil];
return UIPageViewControllerSpineLocationMid;
}
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
// Instantiate the model array
self.modelArray = [[NSMutableArray alloc] init];
[self.modelArray addObject:@"Page One"];
NSLog(@"%@", self.modelArray);
// Instantiate the UIPageViewController
self.pageVC = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:nil];
// Assign the delegate and datasource as self
self.pageVC.delegate = self;
self.pageVC.dataSource = self;
// Set the initial view controllers
ContentVC *cVC = [[ContentVC alloc] initWithNibName:@"ContentVC" bundle:nil];
cVC.labelContents = [self.modelArray objectAtIndex:0];
NSArray *viewControllers = [NSArray arrayWithObject:cVC];
[self.pageVC setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:nil];
// Add the pageViewController as the childViewController
[self addChildViewController:self.pageVC];
// Add the view of pageViewController to the currentView
[self.view addSubview:self.pageVC.view];
// Call didMoveToParentViewController: of the childViewController, the UIPageViewController instance in our case.
[self.pageVC didMoveToParentViewController:self];
// Assign the gestureRecognizers property of the pageViewController to the view's gestureRecognizers property
self.view.gestureRecognizers = self.pageVC.gestureRecognizers;
}
非常感谢！