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POUnable to send image from Collection View Controller to Detail View Controller
 

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    <p>What I have is an array of file names. Here is the code that i have used to fill Collection View Cells.</p> <pre><code> -(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath { CollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"ReuseID" forIndexPath:indexPath]; NSString *dataPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/DrawnImage"]; NSArray *contentOfDirectory = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:dataPath error:NULL]; NSString *fileName = [contentOfDirectory objectAtIndex:indexPath.item]; NSString *path = [dataPath stringByAppendingPathComponent:fileName]; UIImage *image = [UIImage imageWithContentsOfFile:path]; UIImageView *cellImageView = cell.collectionImageView; cellImageView.image = image; return cell; </code></pre> <p>}</p> <p>The images are being correctly displayed in the cells. What i want to do it, when i click on a cell, The picture in that cell must be displayed in full screen in a detail view controller.</p> <p>I have tried this.</p> <pre><code> - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { if ([[segue identifier] isEqualToString:@"showDetail"]) { NSIndexPath *selectedIndexPath = [[self.collectionView indexPathsForSelectedItems] objectAtIndex:0]; NSString *dataPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/DrawnImage"]; NSArray *contentOfDirectory = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:dataPath error:NULL]; NSString *fileName = [contentOfDirectory objectAtIndex:selectedIndexPath.item]; NSString *pathToImage = [dataPath stringByAppendingPathComponent:fileName]; UIImage *image = [[UIImage alloc] initWithContentsOfFile:pathToImage]; UIImageView *backgroundImageView = [[UIImageView alloc] initWithImage:image]; DetailViewController *dvc = [segue destinationViewController]; dvc.finalImage = sender; NSLog(@"%@", backgroundImageView); } </code></pre> <p>}</p> <p>finalImage is an UIImageView in Detail View Controller. I get a run time error when i click one of the cells. What am I doing wrong ?</p> <p><strong>EDIT</strong></p> <p>This is the code that I have right now.</p> <p>CollectionViewController.h</p> <pre><code>@property (nonatomic, retain) UIImage *sendImage; </code></pre> <p>CollectionViewController.m</p> <pre><code>- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { if ([[segue identifier] isEqualToString:@"showDetail"]) { NSIndexPath *selectedIndexPath = [[self.collectionView indexPathsForSelectedItems] objectAtIndex:0]; NSString *dataPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/DrawnImage"]; NSArray *contentOfDirectory = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:dataPath error:NULL]; NSString *fileName = [contentOfDirectory objectAtIndex:selectedIndexPath.item]; NSString *pathToImage = [dataPath stringByAppendingPathComponent:fileName]; UIImage *image = [[UIImage alloc] initWithContentsOfFile:pathToImage]; DetailViewController *dvc = [segue destinationViewController]; dvc.passedInImage = image; image = dvc.passedInImage; } } </code></pre> <p>DetailViewController.h</p> <pre><code>@property (weak, nonatomic) IBOutlet UIImageView *finalImage; @property UIImage *passedInImage; </code></pre> <p>DetailViewController.m</p> <pre><code>-(void)viewDidAppear:(BOOL)animated { self.finalImage.image = passedInImage; } </code></pre>
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