一對一直播app開發，單次獲得或上傳一張相簿裡的照片實現的相關程式碼

SwiftUI沒辦法自己獲取系統相簿內容，所以得依靠一下UIKit，標頭檔案如下：

import SwiftUI
import UIKit

​首先我們建立一個ImagePicker結構體供我們獲取系統相簿內容：

struct ImagePicker: UIViewControllerRepresentable {
  @Environment(\.presentationMode) private var presentationMode
  let sourceType: UIImagePickerController.SourceType
  let onImagePicked: (UIImage) -> Void

  final class Coordinator: NSObject, UINavigationControllerDelegate, UIImagePickerControllerDelegate {

    @Binding private var presentationMode: PresentationMode
    private let sourceType: UIImagePickerController.SourceType
    private let onImagePicked: (UIImage) -> Void

    init(presentationMode: Binding<PresentationMode>,
      sourceType: UIImagePickerController.SourceType,
      onImagePicked: @escaping (UIImage) -> Void) {
      _presentationMode = presentationMode
      self.sourceType = sourceType
      self.onImagePicked = onImagePicked
    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
      let uiImage = info[UIImagePickerController.InfoKey.originalImage] as! UIImage
      onImagePicked(uiImage)
      presentationMode.dismiss()
    }

    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
      presentationMode.dismiss()
    }

  }

  func makeCoordinator() -> Coordinator {
    return Coordinator(presentationMode: presentationMode,
             sourceType: sourceType,
             onImagePicked: onImagePicked)
  }

  func makeUIViewController(context: UIViewControllerRepresentableContext<ImagePicker>) -> UIImagePickerController {
    let picker = UIImagePickerController()
    picker.sourceType = sourceType
    picker.delegate = context.coordinator
    return picker
  }

  func updateUIViewController(_ uiViewController: UIImagePickerController,
                context: UIViewControllerRepresentableContext<ImagePicker>) {
  }
}

然後我們就可以很簡單地從系統相簿中獲取照片了：

struct ContentView: View {
  @State private var showImagePicker = false
  //這裡的image用於放置等會獲取的照片
  @State private var image: UIImage = UIImage()
  var body: some View {
    List{
      Button(action: {
        showImagePicker = true
      }, label: {
        Text("Select Image")
      })
     
      Image(uiImage: image)
        .resizable()
        .aspectRatio(contentMode: .fit)
    }
    .sheet(isPresented: $showImagePicker,
       content: {
      ImagePicker(sourceType: .photoLibrary) { image in
        self.image = image
      }
    })
  }
}

以上就是一對一直播app開發，單次獲得或上傳一張相簿裡的照片實現的相關程式碼， 更多內容歡迎關注之後的文章