-(void)start{

    [self.layer removeAllAnimations];

    // Set the index to 0 on starting

    currentIndex = 0;

    _isRuned = YES;

    // Set running

    _running = YES;

    

    //Start the animation

    [self animateCurrentTickerString];

}

-(void)pause{

    // Check if running

    if (_running) {

        // Pause the layer

        [self pauseLayer:self.layer];

        

        _running = NO;

    }

}



-(void)resume{

    // Check not running

    if (!_running) {

        //Resume the layer

        [self resumeLayer:self.layer];

        

        _running = YES;

    }

}



#pragma  mark -UIView layer animaion utiltiles

-(void)pauseLayer:(CALayer *)layer{

    CFTimeInterval pausedTime = [layer convertTime:CACurrentMediaTime() fromLayer:nil];

    layer.speed = 0.0;

    layer.timeOffset = pausedTime;

}

-(void)resumeLayer:(CALayer *)layer{

    CFTimeInterval pausedTime = [layer timeOffset];

    layer.speed = 1.0;

    layer.timeOffset = 0.0;

    layer.beginTime = 0.0;

    CFTimeInterval timeSincePause = [layer convertTime:CACurrentMediaTime() fromLayer:nil] - pausedTime;

    layer.beginTime = timeSincePause;

}