UIImagePickerControllerDelegate未被调用，所选图像从未显示

imagePickerController.delegate = self

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
    // 处理选择的图片或拍摄的照片
}

func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
    // 取消选择图片或拍摄照片的操作
}

// 请求相册权限
PHPhotoLibrary.requestAuthorization { status in
    if status == .authorized {
        // 已获得相册权限
    } else {
        // 未获得相册权限
    }
}

// 请求相机权限
AVCaptureDevice.requestAccess(for: .video) { granted in
    if granted {
        // 已获得相机权限
    } else {
        // 未获得相机权限
    }
}

imagePickerController.modalPresentationStyle = .popover
present(imagePickerController, animated: true, completion: nil)