iOS无法通过FCM接收推送通知(可以通过APN)

Question

我本来想在stackoverflow上问这个问题，但我刚刚想明白了。无论如何，为了子孙后代，我会发布这篇文章，因为这个bug花了我好几天的时间，我在这个网站上找不到任何关于它的提及。

在制作了两个不同的方案并根据AppDelegate中的方案选择了不同的plist后，我无法通过FCM发送推送通知。选择我的plist的代码如下所示：

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate, MessagingDelegate {
let defaults = UserDefaults.standard
// NOTE: DONT call registrationDataManager here or any other VC that uses Firebase before it's configured
let gcmMessageIDKey = "gcm.message_id"
let window: UIWindow? = nil
//XXX OVERRIDE INIT BREAKS SWIZZLING -- DO NOT USE
override init() {
super.init()
let buildFor = ProcessInfo.processInfo.environment["BUILD_FOR"]! as String
var firebasePlistFileName = "GoogleService-Info"
if buildFor == "PROD" {
//firebasePlistFileName = "GoogleService-Info-Production"
firebasePlistFileName = "RELEASE-NEW-GoogleService-Info"
print("--- USING PRODUCTION / RELEASE PLIST")
}
else {
firebasePlistFileName = "DEBUG-NEW-GoogleService-Info"
print("--- USING DEBUG PLIST")
}
let filePath = Bundle.main.path(forResource: firebasePlistFileName, ofType: "plist")
guard let fileopts = FirebaseOptions(contentsOfFile: filePath!) else {
assert(false, "Couldn't load config file")
return
}
FirebaseApp.configure(options: fileopts)
}

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

如果你尝试执行上述操作，你可能会注意到一个类似的错误

[AppDelegateSwizzler] App Delegate does not conform to UIApplicationDelegate protocol firebase

Answer 1

您应该做什么而不是：

class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate, MessagingDelegate {
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {

let buildFor = ProcessInfo.processInfo.environment["BUILD_FOR"]! as String
var firebasePlistFileName = "GoogleService-Info"
if buildFor == "PROD" {
//firebasePlistFileName = "GoogleService-Info-Production"
firebasePlistFileName = "RELEASE-NEW-GoogleService-Info"
print("--- USING PRODUCTION / RELEASE PLIST")
}
else {
firebasePlistFileName = "DEBUG-NEW-GoogleService-Info"
print("--- USING DEBUG PLIST")
}
let filePath = Bundle.main.path(forResource: firebasePlistFileName, ofType: "plist")
guard let fileopts = FirebaseOptions(contentsOfFile: filePath!) else {
assert(false, "Couldn't load config file")
}
FirebaseApp.configure(options: fileopts)
}
//....

这是假设您已经进入方案，编辑了具有环境变量BUILD_FOR的方案，并且为您的生产/发布方案将其设置为PROD，然后将基于此指向正确的GoogleServices信息plist文件名。这是用Firebase实现多个plist而不搞砸一切的一种方法。

要点——不要使用overrideinit，除非你想解决自己的问题，或者你比我更了解你在做什么