AlAssetsLibrary issue, code works in 4.3 but not 5.0 - ios5

Question

Here's my issue, if I access this class with iOS 4.X, the code works fine.... however whenever I try to access it with iOS 5.0, I get nil values for the groups & assets. What's the best way to get this to work? I'm posting the entire class for a reference...
.h
#import <UIKit/UIKit.h>
#import <AssetsLibrary/AssetsLibrary.h>
#import "DejViewController.h"
#class Event, Venue;
#interface SelectMediaViewController : DejViewController <UITableViewDelegate, UITableViewDataSource> {
Event *event;
Venue *venue;
UITableView *tableView;
NSMutableArray *selectedAssets;
NSMutableArray *allMedia;
ALAssetsLibrary *library;
NSMutableArray *assetGroups;
}
#property (nonatomic, retain) Event *event;
#property (nonatomic, retain) Venue *venue;
#property (nonatomic, retain) IBOutlet UITableView *tableView;
#property (nonatomic, retain) NSMutableArray *allMedia;
#property (nonatomic, retain) NSMutableArray *assetGroups;
- (IBAction)continuePressed:(id)sender;
#end
.m
#import <ImageIO/ImageIO.h>
#import "SelectMediaViewController.h"
#import "CaptionAllMediaViewController.h"
#import "MediaItem.h"
#import "CLValueButton.h"
#import "SelectMediaTableViewCell.h"
#define kMediaGridSize 75
#define kMediaGridPadding 4
#define kSelectImageTag 828
#interface SelectMediaViewController(Private)
- (void)setContentForButton:(CLValueButton *)button withAsset:(ALAsset *)asset;
- (void)loadData;
#end
#implementation SelectMediaViewController
#synthesize event, venue;
#synthesize tableView;
#synthesize allMedia,assetGroups;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
selectedAssets = [[NSMutableArray alloc] init];
showNextButton = YES;
}
return self;
}
- (void)dealloc {
[tableView release];
[event release];
[venue release];
[library release];
[allMedia release];
[selectedAssets release];
[assetGroups release];
[super dealloc];
}
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - View lifecycle
- (void)viewDidLoad {
[super viewDidLoad];
NSLog(#"SelectMediaViewController - viewDidLoad");
}
- (void)viewDidUnload {
NSLog(#"SelectMediaViewController - viewDidUnload");
[self setTableView:nil];
[super viewDidUnload];
}
- (void)viewDidAppear:(BOOL)animated {
NSLog(#"SelectMediaViewController - viewDidAppear");
[super viewDidAppear:animated];
[self setNavTitle:#"Select Media"];
[self loadData];
[self.tableView reloadData];
float contentOffset = self.tableView.contentSize.height - self.tableView.frame.size.height;
if (contentOffset < 0) contentOffset = 0;
[self.tableView setContentOffset:CGPointMake(0, contentOffset) animated:NO];
}
- (void)viewDidDisappear:(BOOL)animated {
NSLog(#"SelectMediaViewController - viewDidDisappear");
self.allMedia = nil;
[selectedAssets removeAllObjects];
[self.tableView reloadData];
}
- (void)loadData {
NSMutableArray *tempArray = [[NSMutableArray array] init];
library = [[ALAssetsLibrary alloc] init];
void (^assetEnumerator)(ALAsset *, NSUInteger, BOOL *) = ^(ALAsset *result, NSUInteger index, BOOL *stop) {
if(result != NULL) {
NSLog(#"See Asset: %#", result);
[tempArray addObject:result];
NSLog(#"assets count: %i", tempArray.count);
}
else {
NSLog(#"result nil or end of list");
}
};
void (^assetGroupEnumerator)(ALAssetsGroup *, BOOL *) = ^(ALAssetsGroup *group, BOOL *stop) {
if(group != nil) {
[group enumerateAssetsUsingBlock:assetEnumerator];
NSLog(#"group: %#",group);
}
else {
NSLog(#"group nil or end of list");
}
if (stop) {
self.allMedia = [NSMutableArray arrayWithCapacity:[tempArray count]];
self.allMedia = tempArray;
NSLog(#"Loaded data: %d & %d", [tempArray count], [self.allMedia count]);
}
};
//ALAssetsLibrary *library = [[[ALAssetsLibrary alloc] init] autorelease];
[library enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos
usingBlock:assetGroupEnumerator
failureBlock:^(NSError *error) {
}];
//[library release];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
- (IBAction)continuePressed:(id)sender {
if ([selectedAssets count] > 0) {
CaptionAllMediaViewController *captionVC = [[CaptionAllMediaViewController alloc] initWithNibName:nil bundle:nil];
captionVC.event = self.event;
captionVC.venue = self.venue;
// Create media items
NSMutableArray *mediaItems = [NSMutableArray arrayWithCapacity:[selectedAssets count]];
for (ALAsset *asset in selectedAssets) {
MediaItem *item = [[MediaItem alloc] init];
item.asset = asset;
NSDictionary *metadata = [[asset defaultRepresentation] metadata];
NSDictionary *gpsMeta = [metadata objectForKey:#"{GPS}"];
if (gpsMeta) {
float latitude = [[gpsMeta objectForKey:#"Latitude"] floatValue];
if ([[gpsMeta objectForKey:#"LatitudeRef"] isEqualToString:#"S"]) latitude = latitude * -1;
float longitude = [[gpsMeta objectForKey:#"Longitude"] floatValue];
if ([[gpsMeta objectForKey:#"LongitudeRef"] isEqualToString:#"W"]) longitude = longitude * -1;
item.location = CLLocationCoordinate2DMake(latitude, longitude);
}
[mediaItems addObject:item];
[item release];
}
captionVC.media = mediaItems;
[self.navigationController pushViewController:captionVC animated:YES];
[captionVC release];
} else {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"No Images Selected"
message:#"Please select at least one image to continue."
delegate:nil
cancelButtonTitle:#"OK" otherButtonTitles: nil];
[alert show];
[alert release];
}
}
- (void)imagePressed:(CLValueButton *)sender {
BOOL currentlySelected = [selectedAssets containsObject:sender.valueObject];
UIImageView *imageView = (UIImageView *)[sender viewWithTag:kSelectImageTag];
if (!currentlySelected) {
[imageView setImage:[UIImage imageNamed:#"image-select-active.png"]];
[selectedAssets addObject:sender.valueObject];
} else {
[imageView setImage:[UIImage imageNamed:#"image-select.png"]];
[selectedAssets removeObject:sender.valueObject];
}
}
#pragma Table view methods
- (int)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
NSLog(#"Getting table view count: %d", [self.allMedia count]);
if ([self.allMedia count] == 0) return 0;
return ceil([self.allMedia count] / 4.0);
}
- (float)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
return 83;
NSLog(#"return83");
}
- (UITableViewCell *)tableView:(UITableView *)_tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
SelectMediaTableViewCell *cell = (SelectMediaTableViewCell *)[_tableView dequeueReusableCellWithIdentifier:#"MEDIA_CELL"];
if (!cell) {
cell = [[[NSBundle mainBundle] loadNibNamed:#"SelectMediaTableViewCell" owner:nil options:nil] objectAtIndex:0];
// wire up selectors
[cell.image1 addTarget:self action:#selector(imagePressed:) forControlEvents:UIControlEventTouchUpInside];
[cell.image2 addTarget:self action:#selector(imagePressed:) forControlEvents:UIControlEventTouchUpInside];
[cell.image3 addTarget:self action:#selector(imagePressed:) forControlEvents:UIControlEventTouchUpInside];
[cell.image4 addTarget:self action:#selector(imagePressed:) forControlEvents:UIControlEventTouchUpInside];
}
int startIndex = indexPath.row * 4;
for (int i = 0; i < 4; i++) {
ALAsset *thisAsset = (startIndex + i) < [self.allMedia count] ? [self.allMedia objectAtIndex:startIndex + i] : nil;
CLValueButton *button = nil;
switch (i) {
case 0:
button = cell.image1;
break;
case 1:
button = cell.image2;
break;
case 2:
button = cell.image3;
break;
case 3:
button = cell.image4;
break;
default:
break;
}
[self setContentForButton:button withAsset:thisAsset];
UIImageView *imageView = (UIImageView *)[button viewWithTag:kSelectImageTag];
// letse see if it's selected or not...
if ([selectedAssets containsObject:button.valueObject]) {
[imageView setImage:[UIImage imageNamed:#"image-select-active.png"]];
} else {
[imageView setImage:[UIImage imageNamed:#"image-select.png"]];
}
}
return cell;
}
- (void)setContentForButton:(CLValueButton *)button withAsset:(ALAsset *)asset {
button.hidden = asset == nil;
if (asset) {
CGImageRef image = [asset thumbnail];
[button setImage:[UIImage imageWithCGImage:image] forState:UIControlStateNormal];
}
[button setValueObject:asset];
}
#pragma -
#end
Any help would be much appreciated, I've been trying to figure this out for 3 days...

Answer 1

The ALAssetsLibrary page in the online documentation now says "The lifetimes of objects you get back from a library instance are tied to the lifetime of the library instance."