Hide Custom ToolBar Button - ios

Question

I have created a custom tabbar and added a custom image at the center position. The following code works as expected.It adds my custom button at the center of the tabbar bar.
CustomTabBarViewController.m
- (void)viewDidLoad {
[super viewDidLoad];
button = [UIButton buttonWithType:UIButtonTypeCustom];
UIImage* buttonImage = [UIImage imageNamed:#"icon_floating.png"];
button.frame = CGRectMake(0.0, 0.0, buttonImage.size.width, buttonImage.size.height);
[button setBackgroundImage:buttonImage forState:UIControlStateNormal];
CGFloat heightDifference = buttonImage.size.height - self.tabBar.frame.size.height;
if (heightDifference < 0)
button.center = self.tabBar.center;
else
{
CGPoint center = self.tabBar.center;
center.y = center.y - heightDifference/2.0;
button.center = center;
}
[button addTarget:self
action:#selector(myAction)
forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
}
-(void) myAction
{
self.selectedIndex = 2;
}
The issue that I have faced as follows. There is a viewcontroller - ChatViewContoller where I hide tabbar. But since the custom button is added on the tabbar, I could not able to hide the custom button with the following code.
ChatViewController.m
- (void)viewDidLoad {
[super viewDidLoad];
CustomTabBarViewController* tab = [[CustomTabBarViewController alloc] init];
tab.button.hidden = YES;
}

Answer 1

Hotspring,please reference the original tabbar object instead of creating a new one while hiding center button i.e
CustomTabBarViewController* tab = //reference to existing tabbar
instead of
CustomTabBarViewController* tab = [[CustomTabBarViewController alloc] init];
and then try hiding button