图像未显示在detailView上

Question

您好我正在使用一个新的应用程序，该应用程序具有从JSON加载数据的CollectionView，当点击特定的Cell时，会转到Detail / FullScreenView。到目前为止一切顺利，但现在我想实施滑动。所以想法是点击/点击特定的Cell - ＆gt;获取全屏视图 - ＆gt;滑动FullScreenView上的所有图像。关键是我的全屏视图正在工作并显示先前在CollectionView上选择的图像，但是滑动不起作用，或者它已被识别但未更改图像。一些帮助会很好。提前谢谢！

我的fotos.h（NSObject）

   @property NSString* Foto;
   @property NSString* Descricao;
   @property NSData* FotoImagem;

我的globals.h

   + (NSMutableArray*) getFotos;
   + (void) setFotos: (NSMutableArray*) fotos;

globals.m

   + (NSMutableArray*) getFotos
{
    if (_fotos == nil)
    _fotos = [NSMutableArray new];

   return _fotos;
}

+ (void) setFotos:(NSMutableArray*) fotos
{
   _fotos = fotos;
}

CollectionView.h

@property IBOutlet UICollectionView *collectionView;

- (IBAction)back:(id)sender;

CollectionView.m

- (void)loadJSON
{

    NSMutableArray* fotos = [[NSMutableArray alloc] init];
    NSError *erro;
    NSData* jsonData = [NSData dataWithContentsOfURL:[NSURL URLWithString:URL_json] options:NSDataReadingUncached error:&erro];

    NSLog(@"Por alguma razão não consegues carregar os dados!");

    NSString* jsonStringData = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

    if (jsonData == nil) {
    }

    else {

        NSError *erro1;
        NSArray *listafotos = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments error:&erro1];

        NSInteger totalfotos = [listafotos count];
        for (NSDictionary* fot in listafotos){

            ExpSFotos* f1 = [ExpSFotos new];
            f1.Foto = [fot objectForKey:@"Foto"];
            f1.Descricao = [fot objectForKey:@"Descricao"];

            NSString* fotoX = f1.Foto;

            NSString* urlFoto = [[NSString alloc] initWithFormat:@"%@%@", URL_fotos, fotoX];
            NSData* fotoData = [NSData dataWithContentsOfURL:[NSURL URLWithString:urlFoto]];
            f1.FotoImagem = fotoData;

            [fotos addObject:f1];

        }
        [ExpSGlobals setFotos:fotos];
    }
}


- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
    NSMutableArray *fotos = [ExpSGlobals getFotos];
    return fotos.count;
}

- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
    return 1;
}

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
    ExpSCell *cell = [self.collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath];
    cell.backgroundColor = [UIColor clearColor];


    if (cell == nil) {

    } else {

        NSMutableArray *fotos = [ExpSGlobals getFotos];
        ExpSFotos *f = [fotos objectAtIndex:indexPath.row];
        cell.foto.image = [UIImage imageWithData:f.FotoImagem];

    }

    return cell;
}


NSIndexPath* lastIndexPath;

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
    lastIndexPath = indexPath;
    [self performSegueWithIdentifier:@"fullScreen" sender:self];
}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([segue.identifier isEqualToString:@"fullScreen"])
    {

        NSMutableArray* fotos = [ExpSGlobals getFotos];
        ExpSFotos* f = [fotos objectAtIndex:lastIndexPath.row];

        ExpSFullScreenViewController* fullScreen = (ExpSFullScreenViewController*)segue.destinationViewController;
        fullScreen.imageToLoad = [UIImage imageWithData:f.FotoImagem];

        fullScreen.detailsDataSource = [[NSArray alloc] initWithArray:fotos];
        fullScreen.detailIndex = lastIndexPath.row;
    }

}


- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section
{
    return 10;
}

- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section
{
    return 0;
}

FullScreen.h

@property UIImage *imageToLoad;

@property IBOutlet UIImageView *full;

@property (nonatomic) NSString *selectedObject;

@property NSMutableArray *arr;

@property (nonatomic) NSArray *detailsDataSource;
@property int detailIndex;

FullScreen.m

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.full.image = self.imageToLoad;
    [full setUserInteractionEnabled:YES];

    UISwipeGestureRecognizer *leftGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeDetectedLeft:)];
    leftGesture.direction = UISwipeGestureRecognizerDirectionLeft;
    [self.view addGestureRecognizer:leftGesture];

    UISwipeGestureRecognizer *rightGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeDetectedRight:)];
    rightGesture.direction = UISwipeGestureRecognizerDirectionRight;
    [self.view addGestureRecognizer:rightGesture];
}

- (void)swipeDetectedRight:(UISwipeGestureRecognizer *)sender
{
    if (detailIndex != 0)
        detailIndex --;

    NSLog(@"Swipe Right Detected");

    full.image = [UIImage imageNamed:[[detailsDataSource objectAtIndex: detailIndex] valueForKey:@"Foto"]];

    NSLog(@"%@", full); 
}

- (void)swipeDetectedLeft:(UISwipeGestureRecognizer *)sender
{
    if (detailIndex < [detailsDataSource count])
        detailIndex ++;

    full.image = [UIImage imageNamed:[[detailsDataSource objectAtIndex: detailIndex] valueForKey:@"Foto"]];

    NSLog(@"Swipe Left Detected");
    NSLog(@"%@", full);

}

我对这种语言不熟悉，对其他语言也没有太多的了解，但经过一些努力和研究，我已经能够实现我所期待的目标直到现在。一些帮助将不胜感激！