Swift 该函数在UIViewControllerRepresentable中不起作用

我试图通过UIViewControllerRepresentable在SwiftUI中实现该组件。视图成功启动，但未刷新的photopicker函数不起作用，它总是返回nil，有人能告诉我问题出在哪里吗

import SwiftUI
import UnsplashPhotoPicker

struct UnsplashImagePicker: UIViewControllerRepresentable {

    var urlUnsplashImage = [UnsplashPhoto]()

    let configuration = UnsplashPhotoPickerConfiguration(
      accessKey: "f99d21d6eb682196455dd29b621688aff2d525c7c3a7f95bfcb05d497f38f5dc",
      secretKey: "ccff858162e795c062ce13e9d16a2cf607076d0eb185141e35b14f589b1cd713",
      allowsMultipleSelection: false)

    func makeUIViewController(context: UIViewControllerRepresentableContext<UnsplashImagePicker>) -> UnsplashPhotoPicker {
        let unsplashImagePicker = UnsplashPhotoPicker(configuration: configuration)
        unsplashImagePicker.delegate = context.coordinator
        return unsplashImagePicker
    }

    func makeCoordinator() -> UnsplashImagePicker.Coordinator {
        Coordinator(self)
    }

    class Coordinator: NSObject, UnsplashPhotoPickerDelegate, UINavigationControllerDelegate {
        var parent: UnsplashImagePicker
        init(_ parent: UnsplashImagePicker) {
            self.parent = parent
        }

        func unsplashPhotoPicker(_ photoPicker: UnsplashPhotoPicker, didSelectPhotos photos: [UnsplashPhoto]) {
            print(photos)
        }

        func unsplashPhotoPickerDidCancel(_ photoPicker: UnsplashPhotoPicker) {
            print("Unsplash photo picker did cancel")
        }
    }

    func updateUIViewController(_ uiViewController: UnsplashPhotoPicker, context: UIViewControllerRepresentableContext<UnsplashImagePicker>) {

    }
}

导入快捷界面
进口光电采集器
结构UnplashImagePicker:UIViewControllerRepresentable{
var urlUnsplashImage=[unplashphoto]（）
let配置=未刷新的光选择器配置(
accessKey:“f99d21d6eb682196455dd29b621688aff2d525c7c3a7f95bfcb05d497f38f5dc”，
秘钥：“ccff858162e795c062ce13e9d16a2cf607076d0eb185141e35b14f589b1cd713”，
allowsMultipleSelection:false）
func makeUIViewController（上下文：UIViewControllerRepresentableContext）->UnflashPhotoPicker{
让unplashImagePicker=unplashPhotoPicker（配置：配置）
unplashImagePicker.delegate=context.coordinator
返回图像选择器
}
func makeCoordinator（）->unplashImagePicker.Coordinator{
协调员（自我）
}
类协调器：NSObject、unflashphotopickerdelegate、UINavigationControllerDelegate{
var父项：图像选择器
init（uu父项：unplashImagePicker）{
self.parent=parent
}
func unplashphotopicker（photoPicker:unplashphotopicker，didSelectPhotos照片：[unplashphoto]）{
印刷品（照片）
}
func unplashphotopickerdidconcel（photoPicker:unplashphotopicker）{
打印（“未刷新的照片选择器已取消”）
}
}
func updateUIViewController（uViewController:UnplashPhotoPicker，上下文：UIViewControllerRepresentableContext）{
}
}