在 didRegisterForRemoteNotificationsWithDeviceToken 方法 内部 ，添加以下代码：
func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData) { let tokenChars = UnsafePointer<CChar>(deviceToken.bytes) var tokenString = "" for i in 0..<deviceToken.length { tokenString += String(format: "%02.2hhx", arguments: [tokenChars[i]]) } FIRInstanceID.instanceID().setAPNSToken(deviceToken, type: FIRInstanceIDAPNSTokenType.Unknown) print("tokenString: (tokenString)")}并且不要忘记在 Capabilities* 内部启用“ 推送通知” 。 *
