应用程序打开时，集合视图无效

Question

我有一个标签栏应用程序，开始标签包含一个几乎全屏的集合视图，其中包含分页图像。当应用程序打开时，分页不起作用是粗糙和零星的，但是，如果您更改选项卡然后返回到初始分页，则分页工作绝对正常。

有没有人经历过这个或者知道是什么导致了这个？

以下是使用的代码：

#import "HomeViewController.h"

@interface HomeViewController ()

@end

@implementation HomeViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}


- (void)viewDidLoad {
    [super viewDidLoad];
    [self createStoneData];
}

- (void)createStoneData {

    self.homeImages = [NSMutableArray array];

    [self.homeImages addObject:[[NSMutableDictionary alloc]
                                initWithObjectsAndKeys:@"Biddlesdon Wardrobes", @"name",
                                @"_NP19981-Edit.jpg", @"image", nil]];
    etc….etc…etc….



    [self.collectionView reloadData];

}

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
    return self.homeImages.count;
}


- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *identifier = @"Cell";

    UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];

    UIImageView *homeImageView = (UIImageView *)[cell viewWithTag:100];
    homeImageView.image = [UIImage imageNamed:[[self.homeImages objectAtIndex:indexPath.row] objectForKey:@"image"]];

    return cell;
}

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
    if (_startingIndexPath) {
        NSInteger currentIndex = floor((scrollView.contentOffset.x - scrollView.bounds.size.width / 1) / scrollView.bounds.size.width) + 1;
        if (currentIndex < [self.homeImages count]) {
            self.title = self.homeImages[currentIndex][@"name"];
        }
    }
}

- (BOOL) shouldAutorotate
{
    return YES;
}

-(NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskAll;
}

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
    [self.collectionView.collectionViewLayout invalidateLayout];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end