为什么iOS中只有一个推送但有两个通知？

Question

我从 iOS 和 Android 应用程序的后端发送推送通知 我在推送请求中查看了以下内容：

Array ( [registration_ids] => Array ( [0] => test_token ) [notification] => Array ( [title] => 通知标题 [body] => 通知文本 [sound] => 1 [content_available ] => 1 [priority] => high [badge] => 4 [smallIcon] => small_logo [click_action] => .NoticeFullController ) [data] => Array ([short_text] => 通知短文本 [selectNotice] = > 123 [selectStatus] => 4 ) [apns] => Array ( [headers] => Array ( [apns-priority] => 5 ) [payload] => Array ( [aps] => Array ( [category] ​​= > notice_push ) ) ) )

Android 应用没有问题，但在 iOS 上出现以下情况：

1. 如果应用在后台或者通知关闭，会显示一个，但是点击后会打开应用的主页面，需要打开一个全视图的页面请求中'selectNotice'字段的ID大于0的通知，否则返回主页。

2. 如果应用程序已打开，则在第一次启动时只有应用程序的声音，仅此而已。并且应该显示一个通知，而不仅仅是它的声音。

3. 下次发送推送时，会显示两条通知，一条来自后台模式，第二条是我的代码创建的，但你只需要一条。并且当你点击它时，应用程序的主页面打开了，但是如果它大于0，你需要打开具有来自请求中'selectNotice'字段的ID的通知的完整视图的页面，否则主页。

帮助处理在 iOS 中的推送。非常感谢您提前。我的 AppDelegate 代码：

import UserNotifications
import Firebase
import FirebaseMessaging

class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate {

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

    // Use Firebase library to configure APIs
    FirebaseApp.configure()

    // Уведомления в фоне
    UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge], completionHandler: {didAllow, error in})

    // Override point for customization after application launch.
    return true
}

func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void)
{
    completionHandler([.alert, .badge, .sound])
}
func userNotificationCenter(center: UNUserNotificationCenter, willPresentNotification notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void)
{
    //Handle the notification
    completionHandler(
        [UNNotificationPresentationOptions.alert,
         UNNotificationPresentationOptions.sound,
         UNNotificationPresentationOptions.badge])
}
func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
    Messaging.messaging().apnsToken = deviceToken
}
func messaging(_ messaging: Messaging, didReceiveRegistrationToken fcmToken: String) {
    Messaging.messaging().subscribe(toTopic: "notice_push")
}
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any]) {

    let content = UNMutableNotificationContent()

    if let title = userInfo["title"]
    {
        content.title = title as! String
    }

    if let short_text = userInfo["short_text"]
    {
        content.body = short_text as! String
    } else if let short_text = userInfo["body"]
    {
        content.body = short_text as! String
    }

    if let badge = userInfo["badge"]
    {
        UIApplication.shared.applicationIconBadgeNumber = badge as! Int
    }
    //category = ".NoticeFullController";

    content.userInfo = userInfo
    content.sound = .default()
    content.threadIdentifier = "my-notice"
    if #available(iOS 12.0, *) {
        content.summaryArgument = "notification"
    } else {
        // Fallback on earlier versions
    }

    UNUserNotificationCenter.current().delegate = self
    let trigger = UNTimeIntervalNotificationTrigger.init(timeInterval: 0.5, repeats: false)
    let request = UNNotificationRequest(identifier:"notice", content: content, trigger: trigger)

    UNUserNotificationCenter.current().add(request) { (error) in
        if let getError = error {
            print(getError.localizedDescription)
        }
    }

}
}

Answer 1

您有两个通知，因为当您的应用处于前台时会调用 func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any])，而当您在应用处于后台时单击通知时会调用。

此方法已弃用。

你只需要实现这两个委托方法。

应用在前台时调用func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void)

func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void)在应用处于后台时点击通知时被调用。