Question

在后台获取新数据后，如果有的话，我想发出本地通知。我这样做了：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{

    if ([application respondsToSelector:@selector(registerUserNotifitacionSetting:)]) {

        [application registerUserNotifitacionSetting:[UIUserNotificationSettings settingForTypes: UIUserNotificationTypeAlert|UIUserNotificationTypeBadge categories:nil]];
    }
    return YES;
}

- (void) application:(UIApplication *) application performFetchWithCompletionHandler: (void(^) (UIBackgroundFetchResult)) completionHandler {

    [self SendNotification];

    completionHandler(UIBackgroundFetchResultNewData);

}

-(void) SendNotification {    
    UILocalNotification *notification = [[UILocalNotification alloc]init];

    [notification setAlertBody:@"My text"];
    [notification setFireDate:[NSDate dateWithTimeIntervalSinceNow:30]];
    [notification setTimeZone:[NSTimeZone defaultTimeZone]];
    notification.category = @"my category";
    [[UIApplication sharedApplication] scheduleLocalNotification:notification];
}

在设置项目中，我设置了后台提取和远程通知。调试-(void) application:(UIApplication *) application performFetchWithCompletionHandler: (void(^) (UIBackgroundFetchResult)) completionHandler中的日志未显示时。

请告诉我，我做错了什么？

Answer 1

如果你能够转换它，那么这将是完美的iOS 8.3 （swift 1.2）

func applicationDidEnterBackground(application: UIApplication) {

let notification: UILocalNotification = UILocalNotification()
    notification.timeZone = NSTimeZone.defaultTimeZone()

    _ = NSDate()
    notification.fireDate = NSDate(timeIntervalSinceNow: (Time in seconds))
    notification.alertBody = "Alert Body"
    notification.alertAction = nil
    UIApplication.sharedApplication().scheduleLocalNotification(notification)
}

如何在后台模式下发出本地通知？

1 个答案: