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Question

For some reason, my bottom nav bar is not hiding on my main view controller (blue screen in the following storyboard):

I do not want a tab bar to display on the bottom of the blue screen, so I've put in the following code in its view controller:

override func viewWillAppear(animated: Bool) {
    self.navigationController?.setToolbarHidden(true, animated: animated)
    self.navigationController?.setNavigationBarHidden(true, animated: animated)
    super.viewWillAppear(animated)
}

override func viewWillDisappear(animated: Bool) {
    self.navigationController?.setToolbarHidden(false, animated: animated)
    self.navigationController?.setNavigationBarHidden(false, animated: animated)
    super.viewWillDisappear(animated)
}

It top navigation bar is not displaying (as expected), but the bottom bar is not hiding. It's also displaying twice on every screen thereafter (see screenshot below):

Is it because I have a Tab Bar Controller in my interface builder? Is there a way to implement the tab bar controller with four icons programmatically instead? The only screen that I really want the tab bar controller to be on is the Table View.

Answer 1

Use hidesBottomBarWhenPushed

In the view controller with blue background color:

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if let desVC: UIViewController = segue.destinationViewController as? UIViewController {
        desVC.hidesBottomBarWhenPushed = true
    }
}

Answer 2

删除此行self.navigationController?.setToolbarHidden(true, animated: animated)和TextField顶部连接（安全区域）更改Superview 。