A_UIViewController presentViewController B_UIViewController presentViewController UIImagePickerController dismiss A_UIViewController - ios

Question

Code in A_UIViewController:
PrestBViewController *aviewcontroller = [[PrestBViewController alloc] init];
[self presentViewController:aviewcontroller animated:YES completion:nil];
Code in B_UIViewController:
-(void)presentAction {
UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
imagePickerController.delegate = (id)self;
imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentViewController:imagePickerController animated:YES completion:nil];
}
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
[picker.presentingViewController.presentingViewController dismissViewControllerAnimated:YES completion:nil];
}
When I run the code, it crashes at:
[picker.presentingViewController.presentingViewController dismissViewControllerAnimated:YES completion:nil];
Can anyone help?

Answer 1

Code in A_viewcontroller
- (IBAction)PresentAction:(id)sender {
B_ViewController *aviewcontroller = [self.storyboard instantiateViewControllerWithIdentifier:#"aa"];
[self presentViewController:aviewcontroller animated:YES completion:nil];
}
Code in B_viewController
#implementation ViewController{
UIImagePickerController *picker;
}
- (void)viewDidLoad {
[super viewDidLoad]; //Check if Camera Available
if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:#"Error" message:#"Device has no Camera" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction* ok = [UIAlertAction actionWithTitle:#"OK" style:UIAlertActionStyleDefault handler:nil];
[alertController addAction:ok];
[self presentViewController:alertController animated:YES completion:nil];
}
- (IBAction)takePic:(id)sender { //Button to get image from camera
picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = YES;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentViewController:picker animated:YES completion:NULL];
}
- (IBAction)chooosePic:(id)sender { //Button to get image from albums
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = YES;
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:picker animated:YES completion:NULL];
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { //Choose image
UIImage *chosenImage = info[UIImagePickerControllerEditedImage];
self.imageView.image = chosenImage;
[picker dismissViewControllerAnimated:YES completion:NULL];
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker { //if cancelled before selection
[picker dismissViewControllerAnimated:YES completion:NULL];
}
Works Fine Try