iOS: UIImagePickerController and ResignFirstResponder - objective-c

Question

I have an application that allows the user to select a photo from their camera roll, and display it in a UIImageView. But, after they tap on which image they would like to display, the camera roll's view does not disappear. So, I figured that I would need to simply call [sender resignFirstResponder];. But, this did not do the trick. I've been trying multiple things and doing searching around, but to no avail. I'm very new to Objective-C, so any help is much appreciated. Here is the code I'm working with:
(imgPicker is the UIImagePickerController.)
- (IBAction)grabImage(id)sender {
self.imgPicker = [[UIImagePickerController alloc] init];
self.imgPicker.delegate = self;
self.imgPicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
_popover = [[UIPopoverController alloc] initWithContentViewController:imgPicker];
[_popover presentPopoverFromRect:self.imageView.bounds inView:self.imageView permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
else {
[self presentModalViewController:imgPicker animated:YES];
}
[self.imgPicker resignFirstResponder];
}
And this may or may not be relevant to the issue:
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)img editingInfo:(NSDictionary *)editInfo {
if (imageView.image == nil) {
imageView.image = img;
[[picker parentViewController] dismissModalViewControllerAnimated:YES];
return;
}
if (imageView2.image == nil) {
imageView2.image = img;
[[picker parentViewController] dismissModalViewControllerAnimated:YES];
return;
}
}

Answer 1

You need just this line to dismiss modal picker in your delegate method:
[picker dismissModalViewControllerAnimated:YES];
resignFirstResponder in this case is useless

Answer 2

Try
[self dismissModalViewControllerAnimated:YES];

Answer 3

As you want to dismiss only picker view and not parent view of picker
you just have to use:
[picker dismissModalViewControllerAnimated:YES];
and you are done.