我在我的应用程序中使用推送通知服务。当应用程序在后台时,我能够在通知屏幕上看到通知(当我们从iOS设备顶部向下滑动时显示的屏幕)。但如果应用程序是在前台的委托方法
- (void)application:(UIApplication*)application didReceiveRemoteNotification:(NSDictionary*)userInfo
正在被调用,但通知屏幕上没有显示通知。
我想在通知屏幕上显示通知,不管应用程序是在后台还是前台。我厌倦了寻找解决办法。任何帮助都非常感激。
在你的应用委托中使用下面的代码
import UIKit
import UserNotifications
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate {
var currentToken: String?
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
application.registerForRemoteNotifications()
let center = UNUserNotificationCenter.current()
center.requestAuthorization(options: [.alert, .sound, .badge]) { (granted, error) in
// Enable or disable features based on authorization.
if granted == true
{
print("Allow")
UIApplication.shared.registerForRemoteNotifications()
}
else
{
print("Don't Allow")
}
}
UNUserNotificationCenter.current().delegate = self
return true
}
func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data){
let tokenParts = deviceToken.map { data -> String in
return String(format: "%02.2hhx", data)
}
let token = tokenParts.joined()
currentToken = token //get device token to delegate variable
}
public class var shared: AppDelegate {
return UIApplication.shared.delegate as! AppDelegate
}
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
completionHandler([.alert, .badge, .sound])
}
}
添加completionHandler行委托方法为我解决了同样的问题:
//Called when a notification is delivered to a foreground app.
@available(iOS 10.0, *)
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
completionHandler([.alert, .badge, .sound])
}
下面是当应用程序处于活动状态(前台或打开)时接收推送通知的代码。UNUserNotificationCenter文档
@available(iOS 10.0, *)
func userNotificationCenter(center: UNUserNotificationCenter, willPresentNotification notification: UNNotification, withCompletionHandler completionHandler: (UNNotificationPresentationOptions) -> Void)
{
completionHandler([UNNotificationPresentationOptions.Alert,UNNotificationPresentationOptions.Sound,UNNotificationPresentationOptions.Badge])
}
如果您需要访问通知的userInfo,请使用代码:notification.request.content.userInfo
正如@Danial Martine所说,iOS不会显示通知横幅/提醒。这是故意的。但如果真要这么做,还有一个办法。我也用同样的方法做到了这一点。
1.从parse FrameWork下载解析框架
2.导入# Import <Parse/Parse.h> .h
3.将以下代码添加到您的didReceiveRemoteNotification方法
- (void)application:(UIApplication *)application
didReceiveRemoteNotification:(NSDictionary *)userInfo
{
[PFPush handlePush:userInfo];
}
PFPush会注意如何处理远程通知。如果App在前台,这显示警报,否则它显示在顶部的通知。