将 Flutter App 的 iOS 部分连接到 Firebase 的困惑

Question

我正在尝试将我的 Flutter 应用的 iOS 部分连接到 Firebase。当我完成 Firebase 上的步骤时 - “将 Firebase 添加到您的 iOS 应用程序” - 我点击了一个步骤，上面写着“将下面的初始化代码添加到您的主 AppDelegate 类 "（斯威夫特版本）：

import UIKit
import Firebase

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

  var window: UIWindow?

  func application(_ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?)
    -> Bool {
    FirebaseApp.configure()
    return true
  }
}

但是我的 AppDelegate 类已经有了这个代码：

import UIKit
import Flutter

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?
  ) -> Bool {
    GeneratedPluginRegistrant.register(with: self)
    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }
}

不知道该怎么办。我是用 Firebase 提供的代码替换现有代码还是以某种方式协调两者？

Answer 1

在给定的（预定义的）AppDelegate 类中，您需要另外做两件事。 他们是

import Firebase  // <-- 1st add

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
    override func application(_ application: UIApplication,didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?
    ) -> Bool {
        GeneratedPluginRegistrant.register(with: self)

        FirebaseApp.configure() // <-- 2nd add

        return super.application(application, didFinishLaunchingWithOptions: launchOptions)
    }
}

Answer 2

将两个代码合并在一起：

import UIKit
import Flutter
import Firebase

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
    override func application(
        _ application: UIApplication,
        didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?
    ) -> Bool {
        GeneratedPluginRegistrant.register(with: self)
        FirebaseApp.configure()
        return super.application(application, didFinishLaunchingWithOptions: launchOptions)
    }
}