gistfile1.m

- (void)viewWillAppear:(BOOL)animated{
  [super viewWillAppear:animated];
  
  __block UIView *searchLabel = [self.filterScrollingView viewWithTag:kSearchLabel];
  [UIView animateWithDuration:15. delay:0. options:(UIViewAnimationOptionRepeat | UIViewAnimationOptionCurveLinear) animations:^{
    searchLabel.center = CGPointMake(-searchLabel.bounds.size.width / 2, searchLabel.center.y);
  } completion:nil]; 
}