How to check update Available on Apple Store and give popup in Objective C

Question

I am new in iOS and I am facing problem regarding to check new update available to Apple Store.

Is there is any API to check?

Answer 1

do like

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.

// Fabric implementation

[self needsUpdate:^(NSDictionary *dictionary) {
    // you can use the dictionary here

     NSDictionary* infoDictionary = [[NSBundle mainBundle] infoDictionary];

    if ([dictionary[@"resultCount"] integerValue] == 1){
        NSString* appStoreVersion = dictionary[@"results"][0][@"version"];
        NSString* currentVersion = infoDictionary[@"CFBundleShortVersionString"];
        if (![appStoreVersion isEqualToString:currentVersion]){
            NSLog(@"Need to update [%@ != %@]", appStoreVersion, currentVersion);
             [self showAlert];
        }


    }

    // if you want to update UI or model, dispatch this to the main queue:
   // dispatch_async(dispatch_get_main_queue(), {
        // do your UI stuff here
    //    do nothing
   // });
}];

}

for reference purpose I taken the answer from here

-(void)needsUpdate:(void (^)(NSDictionary * dictionary))completionHandler{

NSDictionary* infoDictionary = [[NSBundle mainBundle] infoDictionary];
NSString* appID = infoDictionary[@"CFBundleIdentifier"];
NSURL* url = [NSURL URLWithString:[NSString stringWithFormat:@"http://itunes.apple.com/lookup?bundleId=%@", appID]];
   NSURLRequest *request = [NSURLRequest requestWithURL:url];

NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *task = [session dataTaskWithRequest:request
                                        completionHandler:
                              ^(NSData *data, NSURLResponse *response, NSError *error) {

                                  NSDictionary* lookup = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];

                                  if (completionHandler) {
                                      completionHandler(lookup);
                                  }



                              }];

[task resume];



}

show the alert

-(void)showAlert
{
UIAlertController *alertController = [UIAlertController  alertControllerWithTitle:@"please update app"  message:nil  preferredStyle:UIAlertControllerStyleAlert];
[alertController addAction:[UIAlertAction actionWithTitle:@"Okay!" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action)
                            {
                                @try
                                {
                                    NSLog(@"tapped ok");
                                    BOOL canOpenSettings = (UIApplicationOpenSettingsURLString != NULL);
                                    if (canOpenSettings)
                                    {
                                        NSURL *url = [NSURL URLWithString:@"https://itunes.apple.com/in/app/tvfplay/id1067732674?mt=8"];
                                        [[UIApplication sharedApplication] openURL:url options:@{} completionHandler:nil];
                                    }
                                }
                                @catch (NSException *exception)
                                {

                                }
                            }]];
UIWindow* topWindow = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
topWindow.rootViewController = [UIViewController new];
topWindow.windowLevel = UIWindowLevelAlert + 1;
[topWindow makeKeyAndVisible];
[topWindow.rootViewController presentViewController:alertController animated:YES completion:nil];

}

Answer 2

There is no direct API available for app update checking but you can check current version to iTune version.

Please check below links for the same :

SO Answer's:

IOS app update check within application

Check if my app has a new version on AppStore

There is also one library for checking update :

https://github.com/nicklockwood/iVersion

Hope this will helps you to check your app update.