选择取消按钮错误后的iOS 11 UIImagePickerController

Question

I'm using UIImagePickerController to select the photo and crop image.

This is the same situation as seen at https://forums.developer.apple.com/thread/88286

Here is my code:

- (void) onTest:(UIButton *)btn {
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
    picker.delegate = self;
    picker.allowsEditing = YES;
    [picker setModalPresentationStyle: UIModalPresentationOverCurrentContext];
    [self presentViewController:picker animated:YES completion:nil];
}

This is view layer. I did not add this UIView. I can't press the cancel button and I can't zoom in/out.

There is no problem with iOS 10. I only have a problem with iOS 11.

Answer 1

I have a good idea to address this issue.

Set the controller (from which you show the UIImagePickerController ) as the delegate for the UIImagePickerController , then conforms the UINavigationControllerDelegate since UIImagePickerController is the subclass of UINavigationController , then implement the method:

- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated {
  if ([UIDevice currentDevice].systemVersion.floatValue < 11) {
    return;
  }
  if ([viewController isKindOfClass:NSClassFromString(@"PUPhotoPickerHostViewController")]) {
    weakify(viewController);
    [viewController.view.subviews enumerateObjectsUsingBlock:^(__kindof UIView * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
      if (obj.frame.size.width < 42 && FLOAT_EQUAL(obj.frame.size.height, [[UIScreen mainScreen] bounds].size.height)) {
        strongify(viewController);
        [viewController.view sendSubviewToBack:obj];
        *stop = YES;
      }
    }];
  }
}

Answer 2

- (IBAction)addPhoto:(UIButton *)sender {

    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    picker.allowsEditing = YES;
    picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

    [self presentViewController:picker animated:YES completion:NULL];
 }

Use this delegate :-

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {

    [picker dismissViewControllerAnimated:YES completion:NULL];

}

Answer 3

Use this code to open Photo library:

        UIImagePickerController *pickerView = [[UIImagePickerController alloc] init];
        pickerView.allowsEditing = YES;
        pickerView.delegate = self;
        [pickerView setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
        [self presentViewController:pickerView animated:YES completion:nil];

And use this delegate to get the cropped image to your view controller:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    UIImage *chosenImage = info[UIImagePickerControllerEditedImage];
    UIImage *image = chosenImage;
   [picker dismissViewControllerAnimated:YES completion:NULL];

}