ios - 从 Firebase 数据库中检索用户数据并显示在用户配置文件文本字段中

Question

我想从 Firebase 数据库中检索用户数据(例如用户名、电子邮件、年龄、性别、高度等数据)并将其显示在位于我的 UserProfileViewController 中的文本字段中。当用户注册并创建配置文件时，我已经成功地将用户数据存储在我的数据库中。但是，我无法从数据库中取回该数据并将其显示在用户配置文件 View Controller 中。我如何才能在 ageTextField 中显示用户年龄，在 genderTextField 中显示用户性别等？

我尝试在 CreateProfileViewController 中为值(用户名、电子邮件、年龄、性别、高度等)创建一个字典，但是当我尝试在 UserProfileViewController 中检索它们时它似乎不起作用。我想知道是否有人可以帮助我解决这个问题？

这是我的 CreateProfileViewController 的一部分，它将用户数据存储到数据库中:

//reference database
var ref : DatabaseReference!
ref = Database.database().reference().child("users")

 func profile(){

//get data from the current user who signed up (their uid and email), so that the profile data can be stored under the same user) 

        let key = ref.childByAutoId().key 
        let email = Auth.auth().currentUser?.email 


let user = [
                    "id": key,
                    "email": email,
                    "age": ageTextField.text! as String,
                    "gender": genderTextField.text! as String,
            "weight": weightTextField.text! as String,
            "height": heightTextField.text! as String,
            "monthlyGoal": monthlyGoalTextField.text! as String
        ]

self.ref.child(key).setValue(user)

}

 @IBAction func submitProfile(_ sender: Any) {
        profile()
        self.performSegue(withIdentifier: "toSegue", sender: self)
        print("User profile created!")//this takes them to the home page view controller once they successfully sign up and create a profile.

    }

Answer 1

使用uid 作为存储用户详细信息的键。使用 let key = Auth.auth().currentUser?.uid 而不是 let key = ref.childByAutoId().key

func profile() {
    guard let key = Auth.auth().currentUser?.uid else { return }
    let email = Auth.auth().currentUser?.email 
    let user = ["id": key,
                "email": email,
                "age": ageTextField.text! as String,
                "gender": genderTextField.text! as String,
                "weight": weightTextField.text! as String,
                "height": heightTextField.text! as String,
                "monthlyGoal": monthlyGoalTextField.text! as String]
    self.ref.child(key).setValue(user)
}

使用 currentUser?.uid

从 Firebase 检索用户详细信息

func getUserDetails() {
    guard let key = Auth.auth().currentUser?.uid else { return }
    self.ref.child(key).observeSingleEvent(of: .value, with: { (snapshot) in
        // Get user value
        let value = snapshot.value as? [String: Any]
        self.emailTextField.text = value?["email"] as? String
        // ...
    }) { (error) in
        print(error.localizedDescription)
    }
}