iOS 如何将图像索引从 collectionview 传递到 scrollview

Question

我正在创建一个程序，如果我在 collectionview 中单击缩略图，则应在另一个 View 收集器中的 ScrollView 中打开较大的图像。为此，我正在使用 segue。但是我在那里做错了，我该如何解决这个问题，

我的 segue 代码是，

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([[segue identifier] isEqualToString:@"showDetail"])
    {
        NSIndexPath *selectedIndexPath = [[self.gallerycollection indexPathsForSelectedItems] objectAtIndex:0];

        // load the image, to prevent it from being cached we use 'initWithContentsOfFile'
        NSString *imageNameToLoad = [NSString stringWithFormat:@"interior_%d", selectedIndexPath.row];
        NSString *pathToImage = [[NSBundle mainBundle] pathForResource:imageNameToLoad ofType:@"jpg"];
        UIImage *image = [[UIImage alloc] initWithContentsOfFile:pathToImage];

        GalleryImageScrollViewController *gallerydetailViewController = [segue destinationViewController];
        gallerydetailViewController.FullScreenImageScroller=image ;
    }
}

detailViewController.m

- (void)viewDidLoad
{
    [super viewDidLoad];


    NSMutableArray *mutablearray = [NSMutableArray array];
    data=[MyDatabase new];
    slideImages=[data OpenMyDatabase:@"SELECT pic_name_big FROM interior":@"pic_name_big"];
    [mutablearray addObjectsFromArray:slideImages];
    temparr = [[NSMutableArray alloc]init];
    temparr=[NSMutableArray arrayWithArray:mutablearray];
    [self putImageViewsInScrollView:[temparr count]];
    self.FullScreenImageScroller.delegate=self;

}




-(void) putImageViewsInScrollView:(int)numberOfImageViews
{
   for(int i=0 ;i<numberOfImageViews; i++)
    {
        fullScreenImageView=[[UIImageView alloc]initWithImage:[UIImage imageNamed:[temparr objectAtIndex:i]]];
        fullScreenImageView.frame = CGRectMake((WIDTH_OF_IMAGE * i)  , 0, WIDTH_OF_IMAGE, HEIGHT_OF_IMAGE);
        [self.FullScreenImageScroller addSubview:fullScreenImageView];
    }
    [self.FullScreenImageScroller setContentSize:CGSizeMake(WIDTH_OF_SCROLL_PAGE * ([temparr count]), HEIGHT_OF_IMAGE)];
    [self.FullScreenImageScroller setContentOffset:CGPointMake(0, 0)];
    [self.FullScreenImageScroller scrollRectToVisible:CGRectMake(WIDTH_OF_IMAGE,0,WIDTH_OF_IMAGE,HEIGHT_OF_IMAGE) animated:NO];


}

那么我应该在 ScrollView Controller (GalleryImageScrollViewController)中传递什么来打开特定缩略图的图像？

Answer 1

像这样将图像名称传递给详细 View Controller

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
 {
   NSArray *indexpaths = [self.collectionView indexPathsForSelectedItems];
   DetailViewController *dest = [segue destinationViewController];
   dest.imageName = [recipeImages objectAtIndex:[[indexpaths objectAtIndex:0] row]];
   // imageName is a property of detail view controller
}

然后在detailViewController的viewDidLoad

- (void)viewDidLoad
 {
    [super viewDidLoad];

   self.imageView.image = [UIImage imageNamed:self.imageName];
}

我没有使用 ScrollView ，只有一个 imageView 作为 subview 添加到 View 中