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。
用于swift 5解析推送通知字典
func application(_ application: UIApplication, didReceiveRemoteNotification data: [AnyHashable : Any]) {
if application.applicationState == .active {
if let aps1 = data["aps"] as? NSDictionary {
if let dict = aps1["alert"] as? NSDictionary {
if let strTitle = dict["title"] as? String , let strBody = dict["body"] as? String {
if let topVC = UIApplication.getTopViewController() {
//Apply your own logic as per requirement
print("strTitle ::\(strTitle) , strBody :: \(strBody)")
}
}
}
}
}
}
获取topBanner所在的top viewController
extension UIApplication {
class func getTopViewController(base: UIViewController? = UIApplication.shared.keyWindow?.rootViewController) -> UIViewController? {
if let nav = base as? UINavigationController {
return getTopViewController(base: nav.visibleViewController)
} else if let tab = base as? UITabBarController, let selected = tab.selectedViewController {
return getTopViewController(base: selected)
} else if let presented = base?.presentedViewController {
return getTopViewController(base: presented)
}
return base
}
}
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
最好的方法是通过使用扩展AppDelegate: UNUserNotificationCenterDelegate在AppDelegate中添加UNUserNotificationCenterDelegate
该扩展告诉应用程序能够在使用时获得通知
并实现这个方法
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
completionHandler(.alert)
}
只有当应用程序在前台时,才会在委托上调用此方法。
最后的实现:
extension AppDelegate: UNUserNotificationCenterDelegate {
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
completionHandler(.alert)
}
}
要调用这个,你必须在AppDelegate中在didFinishLaunchingWithOptions中设置委托添加这一行
UNUserNotificationCenter.current().delegate = self
你可以修改
completionHandler(.alert)
与
completionHandler([.alert, .badge, .sound]))
Swift 5
1)使用UNUserNotificationCenterDelegate确认委托到AppDelegate
2)在didFinishLaunch中UNUserNotificationCenter.current().delegate = self
3)在AppDelegate中实现如下方法。
func userNotificationCenter(_ center: UNUserNotificationCenter,
willPresent notification: UNNotification,
withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
print("Push notification received in foreground.")
completionHandler([.alert, .sound, .badge])
}
就是这样!
如果应用程序在前台运行,iOS不会显示通知横幅/警报。这是故意的。但我们可以通过使用UILocalNotification实现它,如下所示
Check whether application is in active state on receiving a remote
notification. If in active state fire a UILocalNotification.
if (application.applicationState == UIApplicationStateActive ) {
UILocalNotification *localNotification = [[UILocalNotification alloc] init];
localNotification.userInfo = userInfo;
localNotification.soundName = UILocalNotificationDefaultSoundName;
localNotification.alertBody = message;
localNotification.fireDate = [NSDate date];
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
}
迅速:
if application.applicationState == .active {
var localNotification = UILocalNotification()
localNotification.userInfo = userInfo
localNotification.soundName = UILocalNotificationDefaultSoundName
localNotification.alertBody = message
localNotification.fireDate = Date()
UIApplication.shared.scheduleLocalNotification(localNotification)
}