Display Image Using AssetLibrary at Table view - ios

Question

Currently i have 2 view Controllers, i select a photo from view controller,A and pass the image url to second view controller,B and use the url to retrieve the image selected from A.But problem is the image can be retrieved at viewDidLoad but cannot retrieve at table viewcellForRowAtIndexPath. I not sure what is the root cause can somebody help me?
//A.m
(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
// Initialize View Controller B
B *b = [[B alloc]initWithNibName:#"PhotosListViewController" bundle:nil];
// get the ref url
NSURL *imageURL = [info valueForKey:UIImagePickerControllerReferenceURL];
photoListViewController.test = imageURL;
NSLog(#"%#",imageURL);
[picker dismissViewControllerAnimated:YES completion:nil];
[self.navigationController pushViewController:photoListViewController animated:YES];
}
- (IBAction)organiseAttachement:(id)sender {
// Initialize View Controller
B *b = [[PhotosListViewController alloc]initWithNibName:#"B" bundle:nil];
[self.navigationController pushViewController:b animated:YES];
}
//B.h
#import <UIKit/UIKit.h>
#interface PhotosListViewController : UITableViewController <UINavigationControllerDelegate, UIImagePickerControllerDelegate>
#property (nonatomic, strong) NSURL *test;
#end
//B.m
- (void)viewDidLoad
{
[super viewDidLoad];
NSLog(#"Image is THIS --- %#",test);
// define the block to call when we get the asset based on the url (below)
ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *imageAsset)
{
ALAssetRepresentation *imageRep = [imageAsset defaultRepresentation];
CGImageRef iref = [imageRep fullResolutionImage];
if (iref) {
self.galleryImage = [UIImage imageWithCGImage:iref];
}
[self.tableView reloadData];
NSLog(#"[imageRep filename] : %#", [imageRep filename]);
NSLog(#"[imageRep image] : %#", galleryImage);
};
// get the asset library and fetch the asset based on the ref url (pass in block above)
ALAssetsLibrary* assetslibrary = [[ALAssetsLibrary alloc] init];
[assetslibrary assetForURL:test resultBlock:resultblock failureBlock:nil]
}
(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.imageView.image = self.galleryImage;
return cell;
}

Answer 1

Replace
// define the block to call when we get the asset based on the url (below)
ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *imageAsset)
{
ALAssetRepresentation *imageRep = [imageAsset defaultRepresentation];
CGImageRef iref = [imageRep fullResolutionImage];
if (iref) {
self.galleryImage = [UIImage imageWithCGImage:iref];
}
NSLog(#"[imageRep filename] : %#", [imageRep filename]);
NSLog(#"[imageRep image] : %#", galleryImage);
};
with
// define the block to call when we get the asset based on the url (below)
ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *imageAsset)
{
ALAssetRepresentation *imageRep = [imageAsset defaultRepresentation];
CGImageRef iref = [imageRep fullResolutionImage];
if (iref) {
self.galleryImage = [UIImage imageWithCGImage:iref];
}
[self.tableView reloadData]; //Reload the tableView.
NSLog(#"[imageRep filename] : %#", [imageRep filename]);
NSLog(#"[imageRep image] : %#", galleryImage);
};
EDITED:
A.m
#interface A ()
#property(nonatomic,strong) B *b;
#end
#implementation b
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
if(self.b)
{
// Initialize View Controller B
self.b = [[B alloc]initWithNibName:#"PhotosListViewController" bundle:nil];
}
// get the ref url
NSURL *imageURL = [info valueForKey:UIImagePickerControllerReferenceURL];
self.b.test = imageURL;
NSLog(#"%#",imageURL);
[picker dismissViewControllerAnimated:YES completion:nil];
[self.navigationController pushViewController:self.b animated:YES];
}
- (IBAction)organiseAttachement:(id)sender {
if(self.b == nil)
{
// Initialize View Controller
self.b = [[PhotosListViewController alloc]initWithNibName:#"B" bundle:nil];
}
[self.navigationController pushViewController:self.b animated:YES];
}
#end