Dismissing the image picker from the didFinishPickingMediaWithInfo method now impossible? - ios

Question

This seems like a simple question and I've seen similar ones answered but the answers just don't work (at least anymore). I have the following code in viewDidAppear:
UIImagePickerController *imagePicker;
imagePicker =[[UIImagePickerController alloc] init];
imagePicker.allowsEditing = YES;
{imagePicker.sourceType=UIImagePickerControllerSourceTypePhotoLibrary;}
imagePicker.delegate=self;
NSLog(#"ViewDidAppear");
[self presentModalViewController:imagePicker animated:YES];
NSLog (#"Modal Window Displayed.");}
This allows the user to select an image from the image library, which works. Once that image is picked, didFinishPickingMediaWithInfo gets called which has this code at the top of it:
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
NSLog(#"Image Is Picked");
[[picker presentingViewController] dismissViewControllerAnimated:YES completion:nil];
[self dismissModalViewControllerAnimated:YES];
[self.presentingViewController dismissViewControllerAnimated:YES completion:nil];
[self dismissViewControllerAnimated:NO completion:nil];
[self.navigationController popViewControllerAnimated:YES];
As you can see, I've tried several different ways found here on StackOverflow to get this to work. They all get ignored. No errors, just nothing happens; the picker view never goes away. What gives? I'm using xCode 7.2.1.
I have a similar place in my code where I present another modal view and also can't get rid of it.

Answer 1

The problem is that the didFinishPickingMediaWithInfo method doesn't actually dismiss the other view until it is DONE with it's execution (even if what's running in that method takes almost a minute!). By the time that method was done, I had already presented another viewcontroller modally. Almost all of the techniques I'd been trying all along actually still work.

Answer 2

If you present with presentViewController instead of presentModalViewController:
[self presentViewController:imagePicker animated: YES];
then
[self dismissViewControllerAnimated:YES completion:nil];
should work - perhaps the combination of different functions you are calling all at once is confusing things.
If this doesn't work, perhaps try presenting it with a slight delay with dispatch_after - it could be that presenting it within viewDidAppear is causing the issue:
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, Int64(0.001 * Double(NSEC_PER_SEC))), dispatch_get_main_queue()) {
[self presentViewController:imagePicker animated: YES];
}

Answer 3

Below code works for me perfectly. Hope it helps.
in class.h
#interface class : UIViewController<UIImagePickerControllerDelegate>
{
UIImagePickerController *picker;
}
in class.m when getPhoto called, PickerViewController presented.
- (IBAction)getPhoto:(UIButton *)sender {
picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:picker animated:YES completion:nil];
}
- (void)imagePickerController:(UIImagePickerController *)picker2 didFinishPickingMediaWithInfo:(NSDictionary *)info {
[picker2 dismissViewControllerAnimated:YES completion:nil];
}

Answer 4

Globally declare your imagePicker like below
#implementation ViewController{
UIImagePickerController *imagePicker;
}
Display your image picker declared globally
- (IBAction)chooosePic:(id)sender {
imagePicker =[[UIImagePickerController alloc] init];
imagePicker.allowsEditing = YES; {imagePicker.sourceType=UIImagePickerControllerSourceTypePhotoLibrary;}
imagePicker.delegate=self;
NSLog(#"ViewDidAppear");
[self presentModalViewController:imagePicker animated:YES];
NSLog (#"Modal Window Displayed.");
}
didFinishPickingMediaWithInfo method update as below:
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
UIImage *chosenImage = info[UIImagePickerControllerEditedImage];
self.imageView.image = chosenImage;
[imagePicker dismissViewControllerAnimated:YES completion:NULL];
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
[picker dismissViewControllerAnimated:YES completion:NULL];
}
Will Work