如何从Camera ios拍摄多张图像

我正在制作一个实现从相机拍照并从库中选择照片.

使用ELCImagePickerController从库中拍摄照片并在scrollview中设置图像.

我想要做的是从相机拍摄几张图像并在同一滚动视图上设置它.

目前我的实施是:

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

        UIImagePickerController *cameraPicker = [[UIImagePickerController alloc] init];
        cameraPicker.delegate = self;
        cameraPicker.allowsEditing = YES;
        cameraPicker.sourceType = UIImagePickerControllerSourceTypeCamera;

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

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

        [photoPicker dismissViewControllerAnimated:YES completion:NULL];
        UIImage *image=[info objectForKey:UIImagePickerControllerEditedImage];
        UIImageView *imageview = [[UIImageView alloc] initWithImage:image];
        [imageview setContentMode:UIViewContentModeScaleAspectFit];

        [self.scrollView addSubview:imageview];
        [self dismissModalViewControllerAnimated:YES];
}

有了这个,我每次只能拍一张照片,当我再次设置它时,它会替换另一张照片.我该怎么办？以及我如何做到这一点？