Polling Example in iOS

pollingExampleSnippet.m

NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:5.0
                                                  target:self
                                                selector:@selector(pollingMethod)
                                                userInfo:nil
                                                 repeats:YES];
                                                 

-(void)pollingMethod {
    NSLog(@"Polling method called");
}