gistfile1.m

// How to poll

// Property

    NSTimer *keepLoggedInTimer;
    
// Methods

- (void)keepLoginAlive:(NSTimer *)timer;
- (void)startTimerForKeepAlive;

// Start method

#pragma mark Keep Login Alive

- (void)startTimerForKeepAlive {
    
//    NSLog(@"In startTimerForKeepAlive");
    
    NSRunLoop *runLoop = [NSRunLoop currentRunLoop];
    
    NSTimer *keepAliveTimer = 
        [NSTimer scheduledTimerWithTimeInterval:180
                               target:self
                             selector:@selector(keepLoginAlive:)
                             userInfo:nil 
                              repeats:YES];
    
    [runLoop addTimer:keepAliveTimer forMode:NSDefaultRunLoopMode];
    
    self.keepLoggedInTimer = keepAliveTimer;
    
}

// Method called by timer
- (void)keepLoginAlive:(NSTimer *)timer {
    
    BOOL isAlive = [self.serverManager testForFlakServer:hostURL];
    
//    NSLog(@"In keepLoginAlive: %@", [timer fireDate]);
    
    if (!isAlive) {
        [self.serverManager createSession];
    }
    
}