Present UIImagePickerController for capture video

ShowCamera.m

- (void)showCamera
{
    auto showCamera = ^{
        if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
        {
            // TODO: alert
            return;
        }

        auto availableMediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];
        if (![availableMediaTypes containsObject:(NSString*)kUTTypeMovie])
        {
            // TODO: alert
            return;
        }

        auto camera = [[UIImagePickerController alloc] init];
        camera.sourceType = UIImagePickerControllerSourceTypeCamera;
        camera.mediaTypes = @[ (NSString*)kUTTypeMovie ];
        camera.showsCameraControls = YES;
        camera.videoQuality = UIImagePickerControllerQualityTypeIFrame1280x720;
        camera.delegate = self;

        [self presentViewController:camera animated:YES completion:nil];
    };

    [OUPPhotoLibrary up_authorizeVideoRecord:^(BOOL granted) {
        if (granted)
        {
            showCamera();
        }
        else
        {
            // TODO: alert
        }
    }];
}