UIImagePickerController - Save and Retrieve photo from Apps Document Directory - iphone

Question

This is driving me crazy!
I'm successfully saving a photo to my applications document directory from both the camera and if I choose an existing one from the camera roll. The code to do this is as follows. Note I know this part is working because in the simulator I can browse to the apps Documents folder and see the file being saved.
Example "save" code:
//Note: code above snipped to keep this part of the question short
case 1:
{
// select from library
NSLog(#"select from camera roll");
if([util_ isPhotoLibraryAvailable])
{
UIImagePickerController *controller = [[UIImagePickerController alloc] init];
controller.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
NSMutableArray *mediaTypes = [[NSMutableArray alloc] init];
if([util_ canUserPickPhotosFromPhotoLibrary])
{
[mediaTypes addObject:(__bridge NSString *)kUTTypeImage];
}
controller.mediaTypes = mediaTypes;
controller.delegate = self;
controller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:controller animated:YES];
}
} break;
//code below snipped out
And once the image is taken or selected:
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
NSLog(#"picker returned successfully");
NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];
if([mediaType isEqualToString:(__bridge NSString *)kUTTypeImage])
{
UIImage *originalImage = [info objectForKey:UIImagePickerControllerOriginalImage];
UIImage *resizedImage = [util_ createThumbnailForImage:originalImage thumbnailSize:[util_ determineIPhoneScreenSize]];
NSData *imageData = UIImagePNGRepresentation(resizedImage);
NSString* imageName = #"MyImage.png";
NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString* documentsDirectory = [paths objectAtIndex:0];
NSString* fullPathToFile = [documentsDirectory stringByAppendingPathComponent:imageName];
[imageData writeToFile:fullPathToFile atomically:NO];
NSLog(#"fullPathToFile %#", fullPathToFile);
// this outputs the following path in the debugger
// fullPathToFile /Users/me/Library/Application Support/iPhone Simulator/5.0/Applications/47B01A4C-C54F-45C4-91A3-C4D7FF9F95CA/Documents/MyImage.png
// rest snipped out - at this point I see the image in the simulators/app/Documents directory
Now - the part that is NOT working (fetching and displaying the photo):
// code above snipped out (we're in tableView:cellForRowAtIndexPath)
imageButton_ = [[UIButton alloc] initWithFrame:CGRectMake(5, 5, 200, 200)];
NSString* imageName = [contentArray_ objectAtIndex:indexPath.row];
NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
SString* documentsDirectory = [paths objectAtIndex:0];
NSString* fullPathToFile = [documentsDirectory stringByAppendingPathComponent:imageName];
UIImage *image = [UIImage imageNamed:fullPathToFile];
[imageButton_ setImage:image forState:UIControlStateNormal];
[cell addSubview:imageButton_];
NSLog(#"fullPathToFile: %#", fullPathToFile);
// this outputs the following path in the debugger
// fullPathToFile: /Users/me/Library/Application Support/iPhone Simulator/5.0/Applications/47B01A4C-C54F-45C4-91A3-C4D7FF9F95CA/Documents/MyImage.png
return cell;
}
So, I get an empty button with no image displayed in the cell. I have also substituted the button for a UIImageView and still no luck...

Answer 1

Your problem is here:
UIImage *image = [UIImage imageNamed:fullPathToFile];
UIImage imageNamed: is only for images in the bundle. It doesn't work for images in the documents directory.
Try imageWithContentsOfFile: instead.