Using ImagePickerController causes my app to crash - ios

Question

I researched a lot on this one. On touching an button, I have to pick an image from device and display on the screen.
But it causes my app to crash when button is touched/pressed.
It crashes from this line of code:
[self presentModalViewController:myPhotopicker animated:YES];
I am developing an iPad app using Xcode 4.2. I am using iPad 5.0 simulator for testing. And my system runs on Mac OS X, version 10.6.8.
Following function is called when button is pressed:
-(IBAction)getPhoto:(id)sender
{
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {
if (myPhotopicker==nil) { myPhotopicker = [[UIImagePickerController alloc] init];
myPhotopicker.delegate = self; }// create once!
myPhotopicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentModalViewController:myPhotopicker animated:YES];
} else {
NSString *str = #"Photo Album is not available!";
}
}

Answer 1

I tried your code and can reproduce the crash in the simulator.
But it is working fine on my iPhone 4 with iOS 4.2.
That said, I made my gallery in the simulator contain some photos.
(Start in-simulator Safari, open some page, save some pictures by long pressing on them and choosing save from the menu.)
Now, the simulator writes
2012-05-08 15:53:55.605 test[5870:f803] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'On iPad, UIImagePickerController must be presented via UIPopoverController'
to the console.
Okay, read, done:
-(IBAction)getPhoto:(UIButton *)sender
{
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary])
{
if (myPhotopicker==nil) {
myPhotopicker = [[UIImagePickerController alloc] init];
myPhotopicker.delegate = self;
}// create once!
myPhotopicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
// iPad Code:
UIPopoverController *popover =
[[UIPopoverController alloc] initWithContentViewController:myPhotopicker];
[popover presentPopoverFromRect:sender.bounds
inView:self.view
permittedArrowDirections:UIPopoverArrowDirectionAny
animated:YES];
} else {
// iPhone Code:
[self presentModalViewController:myPhotopicker animated:YES];
}
} else {
NSLog(#"Photo Album is not available!");
}
}
And now it looks like that: