使用API​​ / SDK（IOS，Swift）將多張圖片上傳到Google雲端硬盤

Question

我正在開發一個需要5張圖像的應用程序，將其分配給適當的UIImageViewer以進行預覽，然后我想點擊上載，所有5張圖像都將發送到團隊。 目前，除了我擁有的代碼段之外，所有其他程序都可以正常工作，但僅當它們位於應用程序的文檔目錄中時，才能上傳圖像。 我想參考以前選擇的5張圖像，並將其上傳到團隊驅動器，但我不知道該怎么做。

每個按鈕都被分配了一個標簽號，該標簽號將等於其指定的UIImageViewer。 我正在嘗試引用其他先前選擇的圖像，但是在“ UploadAction”按鈕中顯示錯誤“無法將類型'UIImage'的值轉換為預期的參數類型'字符串'”。 這是我的代碼，任何幫助將不勝感激！ （這是在Xcode中的Swift中，我找不到使用swift通過手機攝像頭或照片庫上傳圖片的任何示例）

import UIKit
import GoogleSignIn
import GoogleAPIClientForREST

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate, GIDSignInUIDelegate, UIPickerViewDelegate, UITextFieldDelegate{
    // func numberOfComponents(in pickerView: UIPickerView) -> Int {
    //
    // }

    // func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
     //
    // }

    @IBOutlet weak var imageView1: UIImageView!
    @IBOutlet weak var imageView2: UIImageView!
    @IBOutlet weak var imageView3: UIImageView!
    @IBOutlet weak var imageView4: UIImageView!
    @IBOutlet weak var imageView5: UIImageView!
    @IBOutlet weak var resultsLabel: UILabel!

    var imagePicker = UIImagePickerController()
    var imagePicked = 0

    var cameraPicker = UIImagePickerController()
    var cameraPicked = 0

    fileprivate let service = GTLRDriveService()
    private var drive: ATGoogleDrive?

    override func viewDidLoad() {
        super.viewDidLoad()
        cameraPicker.delegate = self
        cameraPicker.sourceType = .camera
        cameraPicker.allowsEditing = false;     imagePicker.delegate = self
        imagePicker.sourceType = .savedPhotosAlbum
        imagePicker.allowsEditing = false;
        GIDSignIn.sharedInstance().uiDelegate = self;
        self.view.backgroundColor = UIColor.lightGray;

        setupGoogleSignIn()

        drive = ATGoogleDrive(service)
    }

    @IBAction func openCamera(_ sender: UIButton){
        if UIImagePickerController.isSourceTypeAvailable(UIImagePickerController.SourceType.camera){
            cameraPicked = sender.tag
            present(cameraPicker, animated: true)
        }
    }

    @IBAction func chooseImage1(_ sender: UIButton) {
        if UIImagePickerController.isSourceTypeAvailable(UIImagePickerController.SourceType.savedPhotosAlbum){
            imagePicked = sender.tag
            present(imagePicker, animated: true)
        }
    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        let pickedImage = info[UIImagePickerController.InfoKey.originalImage] as? UIImage;

        let cameraImage = info[UIImagePickerController.InfoKey.originalImage] as? UIImage;

        if imagePicked == 1 {
            imageView1.image = pickedImage
        } else if imagePicked == 2 {
            imageView2.image = pickedImage
        } else if imagePicked == 3 {
            imageView3.image = pickedImage
        } else if imagePicked == 4 {
            imageView4.image = pickedImage
        } else if imagePicked == 5 {
            imageView5.image = pickedImage
        } else if cameraPicked == 6 {
            imageView1.image = cameraImage
        } else if cameraPicked == 7 {
            imageView2.image = cameraImage
        } else if cameraPicked == 8 {
            imageView3.image = cameraImage
        } else if cameraPicked == 9 {
            imageView4.image = cameraImage
        } else if cameraPicked == 10 {
            imageView5.image = cameraImage
        }
        dismiss(animated: true)
    }

    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        dismiss(animated: true)
    }

    private func setupGoogleSignIn() {
        GIDSignIn.sharedInstance().delegate = self
        GIDSignIn.sharedInstance().uiDelegate = self
        GIDSignIn.sharedInstance().scopes = [kGTLRAuthScopeDriveFile]
        GIDSignIn.sharedInstance().signInSilently()
    }

    // MARK: - Actions
    **@IBAction func uploadAction(_ sender: Any) {
        if let documentsDir = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).last {
            let uploadem = imageView1.image
            drive?.uploadFile("agostini_tech_demo", filePath: uploadem, MIMEType: "image/png") { (fileID, error) in
                print("Upload file ID: \(fileID); Error: \(error?.localizedDescription)")**
            }
        }
    }

    @IBAction func listAction(_ sender: Any) {
        drive?.listFilesInFolder("agostini_tech_demo") { (files, error) in
            guard let fileList = files else {
                print("Error listing files: \(error?.localizedDescription)")
                return
            }

            self.resultsLabel.text = fileList.files?.description
        }
    }
}

// MARK: - GIDSignInDelegate
extension ViewController: GIDSignInDelegate {
    func sign(_ signIn: GIDSignIn!, didSignInFor user: GIDGoogleUser!, withError error: Error!) {
       if let _ = error {
       //     service.authorizer = nil
        } else {
        //    service.authorizer = user.authentication.fetcherAuthorizer()
        }
    }
}