CODEWITHSUNDEEP
iphoneobjective-cios
Tom
Tom

Reputation: 346

Cant get UIPageViewController to work

I've been working on getting a UIPageViewController to work for quite some time, and the lack of result is starting to drive me nuts...

The following code is part tutorial (which I didn't get to work either) and part me. Right now I'm trying just trying to make each viewControllers view a single label, so that I can make sure it works before adding stuff.

- (void)viewDidLoad
{
[super viewDidLoad];

vcArray = [self createViewControllers:1];
NSLog(@"TEST1");


self.pageController = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStylePageCurl navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:nil];
self.pageController.delegate = self;
self.pageController.dataSource = self;
NSLog(@"TEST2 %@", vcArray);
[self.pageController setViewControllers:vcArray direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:nil];
[[pageController view] setFrame:[[self view] bounds]];
NSLog(@"TEST3");
[self addChildViewController:self.pageController];
[[self view] addSubview:[self.pageController view]];
[pageController didMoveToParentViewController:self];
NSLog(@"TEST4");

}

- (NSArray *) createViewControllers:(NSInteger)ammount{
NSMutableArray *array = [NSMutableArray new];
for (NSInteger i = 0; i <= ammount; i++) {
    PageContentViewController *pageContentViewController = [PageContentViewController new];
    UILabel *label = [UILabel new];
    label.text = @"STRING";
    pageContentViewController.view = label;
    [array addObject:pageContentViewController];
}
return array;
}

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

index--;
return [vcArray objectAtIndex:index];
}

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

index++;
if (index == [vcArray count]) {
    return nil;
}
return [vcArray objectAtIndex:index];
}

- (NSUInteger)indexOfViewController:(PageContentViewController *)viewController
{
return [vcArray indexOfObject:viewController.dataObject];
}

Can you see what I am missing? I've been going through too many tutorials and stackoverflow questions which has left me only more confused...

Thanks in advance, Tom

Upvotes: 0

Views: 866

Answers (1)

Jesper
Jesper

Reputation: 7605

General tips:

Don't use [PageContentViewController new], use [[PageContentViewController alloc] initWithNibName:nil bundle:nil]. Don't use [UILabel new], use [[UILabel alloc] initWithFrame:CGZeroRect].

Step through your code. Check for things that should be objects that are nil. Objective-C will silently allow things to be nil, even if you call methods on them!

Upvotes: 1

Related Questions