是否可以在应用程序后台(关闭应用程序时),iOS,Swift中使用Firebase操作

时间:2019-04-06 21:30:43

标签: ios swift firebase background-task

我想将图像和一些数据上传到Firebase Storage和Firebase Firestore。我已经完成所有代码,但是当我离开应用程序时,上传停止。有什么办法可以使任务在后台运行?

我知道URLSession可以实现,但是我不知道如何使用Firebase做到这一点。

摘要:

我想在Swift中在后台(关闭应用程序时)将数据上传到Firebase。

谢谢!

1 个答案:

答案 0 :(得分:0)

此代码似乎有效:

class PhotoUploadManager {
  static var urlSessionIdentifier = "photoUploadsFromMainApp"  // Should be changed in app extensions.
  static let urlSession: URLSession = {
    let configuration = URLSessionConfiguration.background(withIdentifier: PhotoUploadManager.urlSessionIdentifier)
    configuration.sessionSendsLaunchEvents = false
    configuration.sharedContainerIdentifier = "my-suite-name"
    return URLSession(configuration: configuration)
  }()

  // ...

  // Example upload URL: https://firebasestorage.googleapis.com/v0/b/my-bucket-name/o?name=user-photos/someUserId/ios/photoKey.jpg
  func startUpload(fileUrl: URL, contentType: String, uploadUrl: URL) {
    Auth.auth().currentUser?.getIDToken() { token, error in
      if let error = error {
        print("ID token retrieval error: \(error.localizedDescription)")
        return
      }
      guard let token = token else {
        print("No token.")
        return
      }

      var urlRequest = URLRequest(url: uploadUrl)
      urlRequest.setValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
      urlRequest.setValue(contentType, forHTTPHeaderField: "Content-Type")
      urlRequest.httpMethod = "POST"
      let uploadTask = PhotoUploadManager.urlSession.uploadTask(with: urlRequest, fromFile: fileUrl)
      uploadTask.resume()
    }
  }
}

感谢@Gagan_iOS! 资源: https://github.com/firebase/firebase-ios-sdk/issues/147