我正在通过制作应用程序来学习Swift和Firebase。在当前的Firestore中,我有一个数据库,该数据库的集合名称为Players,并且在集合内部,有一个文档带有auto-documentID和两个字段,例如name和email。像这样。
firestore image
我还使用Firebase Auth,因此无论何时用户注册帐户,我都将其电子邮件与字段名称电子邮件一起放入Firestore。
这是RegisterViewController的代码,其中用户使用电子邮件和密码注册帐户。
import UIKit
import Firebase
class RegisterViewController: UIViewController {
@IBOutlet weak var emailTextField: UITextField!
@IBOutlet weak var passwordTextField: UITextField!
let db = Firestore.firestore()
override func viewDidLoad() {
super.viewDidLoad()
}
//MARK: - register a new account
@IBAction func registerPressed(_ sender: UIButton) {
if let email = emailTextField.text, let password = passwordTextField.text {
Auth.auth().createUser(withEmail: email, password: password) { authResult, error in
if error != nil {
// some codes here
} else {
// Add a new document with a generated ID
var ref: DocumentReference? = nil
ref = self.db.collection(K.FStore.playersCollection).addDocument(data: [K.FStore.emailField: email, K.FStore.nameField: ""]) { (error) in
if let err = error {
print("There was an issue storing data to firestore. \(err)")
} else {
print("Document added with ID: \(ref!.documentID)")
}
}
// pass this data
func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == K.registerToHome {
let homeVC = segue.destination as! HomeViewController
homeVC.documentID = ref?.documentID
}
}
self.performSegue(withIdentifier: K.registerToHome, sender: self)
}
}
}
}
}
我打算检查用户在下一个HomeViewController的文档名称字段中是否有名称,因此如果文档中名称字段的值是""
,我想显示一个带有textfeild的警报,以便用户可以添加他们的名字。但是,在HomeViewController中,我需要documentID,因为我将在HomeVC中使用此代码db.collection(K.FStore.playersCollection).document(documentID).getDocument
,所以我想传递用户的documentID(在RegisterVC中,我能够将值作为ref?.documentID
,所以我只想传递将值设为HomeVC)。我尝试使用func prepare(for segue: UIStoryboardSegue, sender: Any?)
,但是无法传递值... 最佳答案
将您的代码更改为:
//您的代码顶部定义id
:
var id = ""
else {
// Add a new document with a generated ID
var ref: DocumentReference? = nil
ref = self.db.collection(K.FStore.playersCollection).addDocument(data: [K.FStore.emailField: email, K.FStore.nameField: ""]) { (error) in
if let err = error {
print("There was an issue storing data to firestore. \(err)")
} else {
print("Document added with ID: \(ref!.documentID)")
self.id = ref!.documentID
self.performSegue(withIdentifier: K.registerToHome, sender: self)
}
}
}
//已取消注册Pressed func:// pass this data
func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == K.registerToHome {
let homeVC = segue.destination as! HomeViewController
homeVC.documentID = self.id
}
}
关于ios - 在Swift中使用segue传递Firestore的documentID,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/63452055/