如何增加重复本地通知的应用程序徽章编号（iPhone）

Question

I've setup a local notification that repeats every minute, however I need the application badge number to increment each time. When I run it at the moment it doesn't seem to increase, it just stays a 1. Please can someone help me out?

Here is how I create the notifications:

// Create the UILocalNotification
UILocalNotification *myNotification = [[UILocalNotification alloc] init];
myNotification.alertBody = @"Blah blah blah...";
myNotification.alertAction = @"Blah";
myNotification.soundName = UILocalNotificationDefaultSoundName;
myNotification.applicationIconBadgeNumber++;
myNotification.timeZone = [NSTimeZone defaultTimeZone];
myNotification.repeatInterval = NSMinuteCalendarUnit;
myNotification.fireDate = [[NSDate date] dateByAddingTimeInterval:30];
[[UIApplication sharedApplication] scheduleLocalNotification:myNotification];

Answer 1

After doing lot's of research I figured out the solution is that there is no solution:

iPhone: Incrementing the application badge through a local notification

It is not possible to update dynamically the badge number with local notifications while your app is in the background. You have to use push notifications.

Answer 2

If you use an outside service such as Parse for Push, this should be easily done. Just increment Parses badge number when a local notification is fired. Although, this is a special case.

Answer 3

While there's no simple applicationIconBadgeNumber++ method, as BFar mentioned, you can achieve what you're asking by updating all of the scheduled UILocalNotifications' applicationIconBadgeNumbers whenever a notification is added or removed.

While this won't work if you have notices that use repeatInterval , as long as you call scheduleNotification and decrementBadgeNumber at the right times, the class below should do the trick.

@implementation NotificationScheduler

+ (void) scheduleNotification:(NSString*)message date:(NSDate*)date {
    UIApplication *app = [UIApplication sharedApplication];
    UILocalNotification *notification = [[UILocalNotification alloc] init];
    if (notification) {
        notification.fireDate = date;
        notification.timeZone = [NSTimeZone defaultTimeZone];

        notification.alertBody = message;
        notification.soundName = UILocalNotificationDefaultSoundName;
        notification.applicationIconBadgeNumber = [self getExpectedApplicationIconBadgeNumber:date];

        [app scheduleLocalNotification:notification];
        [self updateBadgeCountsForQueuedNotifiations];
    }
}

+ (void) decrementBadgeNumber:(long)amount {
    [self setCurrentBadgeNumber:([self getCurrentBadgeNumber] - amount)];
    [self updateBadgeCountsForQueuedNotifiations];
}

+ (long) getExpectedApplicationIconBadgeNumber:(NSDate*)notificationDate {
    long number = [self getCurrentBadgeNumber];
    for (UILocalNotification *notice in [self getScheduledLocalNotifications]) {
        if (notice.fireDate <= notificationDate) {
            number++;
        }
    }
    return number;
}

+ (void) updateBadgeCountsForScheduledNotifiations {
    long expectedBadgeNumber = [self getCurrentBadgeNumber];
    NSArray *allLocalNotifications = [self getScheduledLocalNotifications];
    for (UILocalNotification *notice in allLocalNotifications) {
        expectedBadgeNumber++;
        notice.applicationIconBadgeNumber = expectedBadgeNumber;
    }
    [[UIApplication sharedApplication] setScheduledLocalNotifications:allLocalNotifications];
}

+ (long) getCurrentBadgeNumber {
    return [UIApplication sharedApplication].applicationIconBadgeNumber;
}

+ (void) setCurrentBadgeNumber:(long)number {
    [UIApplication sharedApplication].applicationIconBadgeNumber = number;
}

+ (NSArray*) getScheduledLocalNotifications {
    NSSortDescriptor * fireDateDesc = [NSSortDescriptor sortDescriptorWithKey:@"fireDate" ascending:YES];
    return [[[UIApplication sharedApplication] scheduledLocalNotifications] sortedArrayUsingDescriptors:@[fireDateDesc]];
}

@end

Answer 4

I was able to do it using the following line while schedule the local notification

localNotification.applicationIconBadgeNumber = [UIApplication sharedApplication].applicationIconBadgeNumber + 1;

and on the other end in the appdelegate

- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {

    application.applicationIconBadgeNumber -= 1;
}

Answer 5

Try this ... it worked for me in simple scenario ...

notification.applicationIconBadgeNumber = [UIApplication sharedApplication].scheduledLocalNotifications.count + 1;

And don't forget to set badge icon back to 0 when app launch.

Answer 6

Try something like:

int plusOne = [myNotification.applicationIconBadgeNumber intValue];
plusOne++;

myNotification.applicationIconBadgeNumber = plusOne;

Answer 7

这应该工作。

myNotification.applicationIconBadgeNumber = [[UIApplication sharedApplication] applicationIconBadgeNumber] + 1;