Question

I am using the APNS for receiving push notifications in my application.

The problem is that I am getting the same notifications on some devices but not all. What could the problem be here since I have been trying for about 15 days to solve this issue with no success. Th device token is updating successfully. Because had it not been then I wouldn’t have been getting notification on any device. But the strange thing is I am getting it on half the devices. Please help!!

Here is the code for registering and receiving notifications. I don’t have any code for server side. But as I said that the notifications are working on some devices. On android too they are working.

I have 3 devices here with me and its working on two of them.
iPad2:5.0.1
iPodTouch:4.3.3

Its not working on another iPod touch that I have on version:5.1

Also its showing successfully registered for APNS in all devices. But not sending notifications on some. What can the issue be? Is there something that I am missing?

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)devToken 
{

    deviceToken = [devToken retain];

    NSLog(@"Registered for APNS %@", deviceToken);

    NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];

    NSMutableString *dev = [[NSMutableString alloc] init];

    NSRange r;
    r.length = 1;
    unsigned char c;

    for (int i = 0; i < [deviceToken length]; i++)
    {
        r.location = i;
        [deviceToken getBytes:&c range:r];

        if (c < 10) {
            [dev appendFormat:@"0%x", c];
        }
        else {
            [dev appendFormat:@"%x", c];
        }

    }

    [ud setObject:dev forKey:@"DeviceToken"];
    [ud synchronize];

}

- (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error 
{

    NSLog(@"Failed to register %@", [error localizedDescription]);

    deviceToken = nil;

}

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
{
for(int i=0;i<[viewControllers count];i++)
        {
            if([[viewControllers objectAtIndex:i] isKindOfClass:[Confirmation class]])
            {
                Confirmation *map = (Confirmation*)[[self.navigationController viewControllers] objectAtIndex:i];
                [map setFinalInfo];
                [self.navigationController popToViewController:[[self.navigationController viewControllers] objectAtIndex:i] animated:YES];
            }
        }
}

Answer 1

I replaced the following code:

deviceToken = [devToken retain];

    NSLog(@"Registered for APNS %@", deviceToken);

    NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];

    NSMutableString *dev = [[NSMutableString alloc] init];

    NSRange r;
    r.length = 1;
    unsigned char c;

    for (int i = 0; i < [deviceToken length]; i++)
    {
        r.location = i;
        [deviceToken getBytes:&c range:r];

        if (c < 10) {
            [dev appendFormat:@"0%x", c];
        }
        else {
            [dev appendFormat:@"%x", c];
        }

    }

    [ud setObject:dev forKey:@"DeviceToken"];
    [ud synchronize];

By this:

[devToken retain];
    NSLog(@"~~~~devToken=%@",devToken); 
    NSString *dt = [[devToken description] stringByTrimmingCharactersInSet: [NSCharacterSet characterSetWithCharactersInString:@"<>"]]; 
    dt = [dt stringByReplacingOccurrencesOfString:@" " withString:@""]; 
    //     //DeviceToken = dt;
    NSUserDefaults *def = [NSUserDefaults standardUserDefaults];
    [def setObject:dt forKey:@"DeviceToken"];
    [def synchronize];

and its working fine now!!

The problem was it wasnt updating the device toekn correctly for some devices which I am not sure why as it was working well for some.

Thanks guys!!