UIImagePickerController not loading in viewDidLoad for iPhone SDK - iphone

Question

I'm trying to show a UIImagePickerController as soon as one of my view controller loads. I'd like to this without the user having to press a button so I overrode the viewDidLoad method as follows:
- (void)viewDidLoad {
[super viewDidLoad];
UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
imagePickerController.allowsImageEditing = YES;
imagePickerController.delegate = self;
[self presentModalViewController:imagePickerController animated:YES];
[imagePickerController release];
}
This compiles and runs, however when the view controller is loaded the image picker is not displayed. This code works fine if I attach it to an event of a button for example. Any ideas?
Thanks.

Answer 1

I had the same problem but solved it. Try using
-(void) awakeFromNib {
}
It will load just after everything else loads.

Answer 2

Try putting the code in
-(void)viewDidAppear
That even runs every time the view appears on the screen though (including when it appears after you dismiss the UIImagePicker), so you might have to add a BOOL value to make it only happen the first time it shows, or when you want it (i.e. not after dismissing a modal view).

Answer 3

It seems that viewDidLoad is too early to use presentModalViewController:animated:. I'd sugget to fork off a one-shot timer to call the method from next run loop iteration:
[NSTimer
scheduledTimerWithTimeInterval:0
target:self
selector:#selector(onLoadTimer:)
userInfo:nil
repeats:NO];
add the following method:
- (void)onLoadTimer:(id)unused
{
[self presentModalViewController:imagePickerController animated:YES];
[imagePickerController release];
}