ios - 在 UIImagePickerController 取消按钮不显示？

Question

这里我使用下面的代码。如果有人知道这个问题，请帮助我。我也尝试了以下网址，但它不起作用。请帮助我

iOS7 UIImagePickerController cancel button disappear UIImagePickerController inside UIPopoverController doesn't show Cancel button on iOS7

UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = YES;
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:picker animated:YES completion:NULL];
picker.navigationBar.tintColor = [UIColor redColor];
picker.navigationBar.barStyle = UIBarStyleBlackOpaque;
picker.navigationBar.topItem.rightBarButtonItem.tintColor = [UIColor blackColor];

我的问题:

我的要求:

Answer 1

这对我有用:

    present(imagePicker, animated: true, completion: {
        imagePicker.navigationBar.topItem?.rightBarButtonItem?.tintColor = .black
    })