如何在后台处理NSLocal通知？

Question

• 多个警报通知警报？

• 如果应用程序在后台运行。

Answer 1

在AppDelegate.m课程中使用以下方法。

- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notif{
    [[UIApplication sharedApplication] setApplicationIconBadgeNumber:0];

    if (application.applicationState == UIApplicationStateInactive )
    {
        NSLog(@"app not running");
    }
    else if(application.applicationState == UIApplicationStateActive )
    {
        NSLog(@"App is running");

    }else if(application.applicationState == UIApplicationStateBackground){
        NSLog(@"App is running in background");
    }
}

这可能对您在后台处理本地通知很有帮助。

Answer 2

- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notif{
    [[UIApplication sharedApplication] setApplicationIconBadgeNumber:0];

    if (application.applicationState == UIApplicationStateInactive )
    {
        NSLog(@"app not running");
    }
    else if(application.applicationState == UIApplicationStateActive )
    {
        NSLog(@"App is running");

    }else if(application.applicationState == UIApplicationStateBackground){
        NSLog(@"App is running in background");
    }
}

除了JAGAT对iOS 8+的回答之外，您还需要申请注册才能收听本地通知。你可以用这个：

- (void)application:(UIApplication *)application handleActionWithIdentifier:(NSString *)identifier forLocalNotification:(UILocalNotification *)notification completionHandler:(void(^)())completionHandler{

}

并且允许这样做：

if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)
{
    [[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings
                                                                         settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge)
                                                                         categories:nil]];
}