下面是我从firebase存储中上传和下载用户个人资料照片的方法：

func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?) {
    userPhoto.image = image
    dismissViewControllerAnimated(true, completion: nil)
    var data = NSData()
    data = UIImageJPEGRepresentation(userPhoto.image!, 0.8)!
    // set upload path
    let filePath = "\(FIRAuth.auth()!.currentUser!.uid)/\("userPhoto")"
    let metaData = FIRStorageMetadata()
    metaData.contentType = "image/jpg"
    self.storageRef.child(filePath).putData(data, metadata: metaData){(metaData,error) in
        if let error = error {
            print(error.localizedDescription)
            return
        }else{
        //store downloadURL
        let downloadURL = metaData!.downloadURL()!.absoluteString
        //store downloadURL at database
    self.databaseRef.child("users").child(FIRAuth.auth()!.currentUser!.uid).updateChildValues(["userPhoto": downloadURL])
        }

        }
                   }

我还将图像URL存储到firebase数据库中，并检查用户是否有个人资料照片，否则可能会导致崩溃：

//get photo back

     databaseRef.child("users").child(userID!).observeSingleEventOfType(.Value, withBlock: { (snapshot) in
            // check if user has photo
            if snapshot.hasChild("userPhoto"){
                // set image locatin
                let filePath = "\(userID!)/\("userPhoto")"
                // Assuming a < 10MB file, though you can change that
                self.storageRef.child(filePath).dataWithMaxSize(10*1024*1024, completion: { (data, error) in

                    let userPhoto = UIImage(data: data!)
                    self.userPhoto.image = userPhoto
                })
            }
        })

简单的2020年例子

1.别忘了将pod 'Firebase/Storage'添加到您的podfile中，并且pod install
1.将两个代表添加到您的类中

class YourScreen: UIViewController, 
  UIImagePickerControllerDelegate, UINavigationControllerDelegate {

1.情节提要、按钮、链接到...

@IBAction func tapCameraButton() {
let picker = UIImagePickerController()
picker.allowsEditing = true
picker.delegate = self
present(picker, animated: true)
}

然后再

func imagePickerController(_ picker: UIImagePickerController,
didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {

 guard let im: UIImage = info[.editedImage] as? UIImage else { return }
 guard let d: Data = im.jpegData(compressionQuality: 0.5) else { return }

 let md = StorageMetadata()
 md.contentType = "image/png"

 let ref = Storage.storage().reference().child("someFolder/12345678.jpg")

 ref.putData(d, metadata: md) { (metadata, error) in
     if error == nil {
         ref.downloadURL(completion: { (url, error) in
             print("Done, url is \(String(describing: url))")
         })
     }else{
         print("error \(String(describing: error))")
     }
 }

 dismiss(animated: true)
}

但你把图像放在哪里？

在代码处，

... .child("someFolder/12345678.jpg")

几乎不可避免地，
·使用用户ID、聊天ID、订阅源ID或类似概念作为文件夹名称
·对于名称，唯一可能的是uuid
因此几乎总是

let f = chatId + "/" + UUID().uuidString + ".jpg"
let ref = Storage.storage().reference().child(f)

在Swift 4.2中工作
在这里，我做点击图像，我已经添加了tapGesture，然后它打开画廊，然后选择图像，上传在Firebase，也我添加textField值太我希望它能帮助你，谢谢

import UIKit
import Firebase
class ViewController: UIViewController {

    @IBOutlet var myImageView: UIImageView!
    @IBOutlet var txtText: UITextField!
    var ref = DatabaseReference.init()
    var imagePicker = UIImagePickerController()

    override func viewDidLoad() {
        super.viewDidLoad()
        self.ref = Database.database().reference()
        let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(ViewController.openGalleryClick(tapGesture:)))
        myImageView.isUserInteractionEnabled = true
        myImageView.addGestureRecognizer(tapGestureRecognizer)
        myImageView.backgroundColor = UIColor.red
    }

    @objc func openGalleryClick(tapGesture: UITapGestureRecognizer){
        self.setupImagePicker()
    }

    @IBAction func btnSaveClick(_ sender: UIButton) {
         self.saveFIRData()
    }

    func saveFIRData(){
        self.uploadMedia(image: myImageView.image!){ url in
            self.saveImage(userName: self.txtText.text!, profileImageURL: url!){ success in
                if (success != nil){
                    self.dismiss(animated: true, completion: nil)
                }

            }
        }
    }

    func uploadMedia(image :UIImage, completion: @escaping ((_ url: URL?) -> ())) {
        let storageRef = Storage.storage().reference().child("myimage.png")
        let imgData = self.myImageView.image?.pngData()
        let metaData = StorageMetadata()
        metaData.contentType = "image/png"
        storageRef.putData(imgData!, metadata: metaData) { (metadata, error) in
            if error == nil{
                storageRef.downloadURL(completion: { (url, error) in
                    completion(url)
                })
            }else{
                print("error in save image")
                completion(nil)
            }
        }
    }

    func saveImage(userName:String, profileImageURL: URL , completion: @escaping ((_ url: URL?) -> ())){
        let dict = ["name": "Yogesh", "text": txtText.text!, "profileImageURL": profileImageURL.absoluteString] as [String : Any]
        self.ref.child("chat").childByAutoId().setValue(dict)
    }

}

extension ViewController: UINavigationControllerDelegate, UIImagePickerControllerDelegate{

    func setupImagePicker(){
        if UIImagePickerController.isSourceTypeAvailable(.savedPhotosAlbum){
            imagePicker.sourceType = .savedPhotosAlbum
            imagePicker.delegate = self
            imagePicker.allowsEditing = true

            self.present(imagePicker, animated: true, completion: nil)
        }
    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {

        let image = info[UIImagePickerController.InfoKey.originalImage] as! UIImage
        myImageView.image = image
        picker.dismiss(animated: true, completion: nil)
    }

}