Question

我无法理解错误究竟是什么告诉我的。我尝试使用self并更改类来修复它。仍然无济于事。需要一份指南，以帮助了解我错过了什么或做错了什么。

import UIKit
import Foundation
import Firebase

extension LoginController: UIImagePickerControllerDelegate,UINavigationControllerDelegate{
    func handleRegister(){
        guard let email = emailTextField.text, let password = passwordTextField.text, let name = nameTextField.text
            else {
                print("This form is not valid")
                return
        }

        Auth.auth().createUser(withEmail: email, password: password) { (self, error) in
            if error != nil {
                print(error!)
                return
            }
            guard let uid = self?.uid else{
                return
            }

            //sucessfully authenticated user 
            let storageRef = Storage.storage().reference()

            // On the following line
            if let uploadData = UIImagePNGRepresentation(self.profileImageView.image!) {
                storageRef.putData(uploadData, metadata: nil, completion: { (metadata, error) in
                    if error != nil{
                        print(error)
                        return
                    }
                })
            }

            let ref = Database.database().reference(fromURL: "https://bbooks-96cac.firebaseio.com/")
            let userReference = ref.child("user").child(uid)
            let values = ["name": name, "email": email]
            userReference.updateChildValues(values, withCompletionBlock: {
                (err, ref) in
                if err != nil {
                    print(err)
                    return
                }
                //  print("Saved user successfully into firebase DB")
            })
        }

        dismiss(animated: true, completion: nil)
    }
}

Answer 1

首先，你滥用了术语Auth.auth().createUser(withEmail: email, password: password) { (self, error) in（我很惊讶这里没有错误）。您需要一个更好的变量名称：

self

我会在此处及以下内容中将user更改为Auth.auth().createUser(withEmail: email, password: password) { (user, error) in：

user

其次，if let uploadData = UIImagePNGRepresentation(user!.profileImageView.image!) {是一个可选项，因此您需要打开它：

import urllib.request


def my_downloader(url, filename = None):
    running_total = 0
    def my_reporthook(count, size, total):
        nonlocal running_total
        running_total += size
        print ("{}%".format(100*running_total//total))
    return urllib.request.urlretrieve(url, filename, my_reporthook)

print (my_downloader('https://www.gutenberg.org/files/55146/55146-h.zip'))

用户是什么？没有会员和profileimageView＆＃39;意思？

1 个答案: