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How To Set App Update Alert In IOS App in Objective C

App Update Alert In IOS App in Objective C



The app update alert must be set an your AppDelegate.m file in your  didFinishLaunchingWithOptions method.
- (void)requestUpdate
{
       NSDictionary *infoDictionary = [[NSBundle mainBundle] infoDictionary];
       NSString *appID = infoDictionary[@"CFBundleIdentifier"];
       NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"http://itunes.apple.com/lookup?bundleId=%@",appID]]; 
       NSData *data = [NSData dataWithContentsOfURL:url];

          if (data != nil) {
                NSDictionary *lookup = [NSJSONSerialization JSONObjectWithData:data options:0                                                          error:nil]; 
                if ([lookup[@"resultCount"] integerValue] == 1)
                 {
                     NSString *appStoreVersion = lookup[@"results"][0][@"version"];
                     NSString *currentVersion = infoDictionary[@"CFBundleShortVersionString"]; 

                     if  (![appStoreVersion isEqualToString:currentVersion])
                    {
                        appURL = lookup[@"results"][0][@"trackViewUrl"];

                        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"App Update Available"                                     message:@"" delegate:self cancelButtonTitle:@"Update Now"                                                              otherButtonTitles:@"Remind me later", nil];
                        alert.tag=22;
                        [alert show];
                  }
              }
       }
}

Next, you mast set a <UIAlertViewDelegate> in your file.

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
     if (alertView.tag == 22) {

            if (buttonIndex == 0) {
                        //  you can throw to direct AppStore to update the app.


                        [[UIApplication sharedApplication] openURL:[NSURL URLWithString:appURL]];

             } else if (buttonIndex == 1) {

                       NSLog(@"Skip Update");
            }
      }
}

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