如何处理Could not cast Appdelegate to FIRMessagingDelegate答案

【问题标题】：How to deal with Could not cast Appdelegate to FIRMessagingDelegate如何处理Could not cast Appdelegate to FIRMessagingDelegate
【发布时间】：2019-05-07 11:58:19
【问题描述】：

if #available(iOS 10.0, *) 
{
  // For iOS 10 display notification (sent via APNS)
  UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate

let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]

 UNUserNotificationCenter.current().requestAuthorization(

options: authOptions,
                completionHandler: {_, _ in })
            // For iOS 10 data message (sent via FCM

Messaging.messaging().delegate = (self as! MessagingDelegate)

无法将值从 Appdelegate 转换为 FIRMessagingDelegate

【问题讨论】：

标签： ios swift firebase firebase-cloud-messaging

【解决方案1】：

你需要遵守类行中的协议

class AppDelegate: UIResponder, UIApplicationDelegate,FIRMessagingDelegate {

因为这个演员 (self as! MessagingDelegate) 会崩溃，然后用

替换它

Messaging.messaging().delegate = self

【讨论】：