How Can I Call the “use” button of a UIImagePicker?

I can call the image picker to take photo with [picker takePicture];

But after that, I want to use the image that I took automatically, with code, not with: 1didFinishPickingMediaWithInfo:1

but a void function of the picker... Can I?

    [picker takePicture];
    picker.cameraFlashMode = UIImagePickerControllerCameraFlashModeAuto;
    picker.cameraFlashMode = UIImagePickerControllerCameraFlashModeOn;

I would like to call the function above without real click on "USE" button

    - (void)imagePickerController:(UIImagePickerController *)picker2 didFinishPickingMediaWithInfo:(NSDictionary *)info

    {
NSLog(@"didFinishPickingMedia");
[picker2 dismissViewControllerAnimated:YES completion:NULL];
NSString *mediaType =
[info objectForKey:UIImagePickerControllerMediaType];

if ([mediaType isEqualToString:(NSString *)kUTTypeImage])
{
    NSLog(@"ImageSave");
    UIImage *image = [info
                      objectForKey:UIImagePickerControllerOriginalImage];

    UIImageWriteToSavedPhotosAlbum(image,
                                       self,
                                       @selector(image:finishedSavingWithError:contextInfo:),
                                       nil);
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"SAVED"
                                                        message:@"Image saved in your camera roll" delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
    [alertView show];
}
else if ([mediaType isEqualToString:(NSString *)kUTTypeMovie])
{
    NSString *moviePath = [[info objectForKey:
                            UIImagePickerControllerMediaURL] path];

    if (UIVideoAtPathIsCompatibleWithSavedPhotosAlbum (moviePath)) {
        UISaveVideoAtPathToSavedPhotosAlbum (
                                             moviePath, nil, nil, nil);
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"SAVED"
                                                            message:@"Video saved in your camera roll" delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
        [alertView show];
    }
}

    }