Reputation: 225
I am using a Core Data
to save a UIImage that i get from my UIImagePickerController
(source type = image library). I then Place or rather want to place the photo in a UICollectionViewCell
, Please help and check to see what I am doing wrong.
Here is my UIImagePickerController
it is called by a delegate.
-(void)requestAddScreen {
_picker = [[UIImagePickerController alloc] init];
_picker.delegate = self;
_picker.allowsEditing = NO;
_picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:_picker animated:YES completion:nil];
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo
{
AppDelegate *delegate = [UIApplication sharedApplication].delegate;
NSManagedObjectContext *context = [delegate managedObjectContext];
NSEntityDescription* entityDescription = [NSEntityDescription entityForName:@"Screen" inManagedObjectContext:context];
Screen* newScreen = [[Screen alloc] initWithEntity:entityDescription insertIntoManagedObjectContext:context];
NSData *imageData = UIImagePNGRepresentation(image);
newScreen.image = imageData;
[_project addProjectScreensObject:newScreen];
NSError *error;
[context save:&error];
if (![context save:&error]) {
NSLog(@"Whoops %@ %@", error, [error localizedDescription]);
}
[self dismissViewControllerAnimated:_picker completion:^{
[_collectionView reloadData];
}];
}
And Here is my ViewWillAppear meted. this is where I fetch the data from Core Data, id it Correct?
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:nil];
AppDelegate *delegate = [UIApplication sharedApplication].delegate;
NSManagedObjectContext *context = [delegate managedObjectContext];
//load project
NSFetchRequest *fetch = [[NSFetchRequest alloc]init];
NSEntityDescription *entity = [NSEntityDescription entityForName:@"Project" inManagedObjectContext:context];
[fetch setEntity:entity];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"name == %@", @"EMO-KIT"];
[fetch setPredicate:predicate];
NSError *error;
NSArray *array = [context executeFetchRequest:fetch error:&error];
if (array.count == 1) {
_project = array[0];
} else {
_project = [NSEntityDescription insertNewObjectForEntityForName:@"Project" inManagedObjectContext:context];
[_project setValue:@"EMO-KIT" forKey:@"name"];
}
NSArray* screens = [[_project projectScreens] array];
NSIndexPath *bottomIndexPath=[NSIndexPath indexPathForRow:screens.count inSection:0];
[self.collectionView scrollToItemAtIndexPath: bottomIndexPath atScrollPosition:UICollectionViewScrollPositionRight animated:YES];
}
Upvotes: 0
Views: 102
Reputation: 5369
You can convert UIImage to NSData and save into Core Data as below
Saving
NSData * imageData = UIImagePNGRepresentation(image);
[newsObj setValue:imageData forKey:@"Image"];
Retrieving
UIImage *image = [UIImage imageWithData:[screenObj valueForKey:@"Image"]];
Hope it helps you..
Upvotes: 2