UIImagePickerController in iphone sdk

 -(IBAction)btnPickerClicked(id)sender{
if([UIImagePickerController isSourceTypeAvailable:
            UIImagePickerControllerSourceTypePhotoLibrary])
        {
            UIImagePickerController *picker= [[UIImagePickerController alloc]init];
            picker.delegate = self;
            picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
            [self presentModalViewController:picker animated:YES];
            [picker release];
        }
}
-(void)imagePickerController:(UIImagePickerController *)picker
      didFinishPickingImage : (UIImage *)image
                 editingInfo:(NSDictionary *)editingInfo
{
    imgView.image = image;
    [picker dismissModalViewControllerAnimated:YES];
}
-(void)imagePickerControllerDidCancel:(UIImagePickerController *) picker
{
    [picker dismissModalViewControllerAnimated:YES];
}