如何从视图控制器中选择情节提要中的UIImage

// 在视图控制器中创建一个按钮
UIButton *chooseImageButton = [UIButton buttonWithType:UIButtonTypeSystem];
[chooseImageButton setTitle:@"选择图片" forState:UIControlStateNormal];
[chooseImageButton addTarget:self action:@selector(chooseImage) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:chooseImageButton];

// 选择图片的方法
- (void)chooseImage {
    // 创建图片选择器
    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
    imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; // 设置选择器的来源为相册
    imagePicker.delegate = self; // 设置代理
    [self presentViewController:imagePicker animated:YES completion:nil]; // 打开图片选择器
}

// 图片选择器的代理方法
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<UIImagePickerControllerInfoKey, id> *)info {
    UIImage *selectedImage = info[UIImagePickerControllerOriginalImage]; // 获取用户选择的图片
    // 在这里对selectedImage进行后续处理，如展示、保存等操作
    [picker dismissViewControllerAnimated:YES completion:nil]; // 关闭图片选择器
}