Swift无Storyboard：仅为HomeViewController添加navigationController

Absolutely, there are a few solid approaches to solve this—let’s break down the best options first, plus a workaround if you really need to handle it within HomeViewController’s lifecycle methods.

First: The Cleanest & Recommended Approach #

Instead of trying to tack on the navigation controller later in HomeViewController’s lifecycle, wrap it around HomeViewController when you initialize the SWRevealViewController. This keeps your view hierarchy tidy and avoids weird navigation stack issues down the line.

Modify your loginPressed method like this:

@IBAction func loginPressed(_ sender: Any) {
    let homeVC = HomeViewController()
    // Wrap HomeViewController in a UINavigationController first
    let homeNavController = UINavigationController(rootViewController: homeVC)
    
    let rearViewController = TableViewController()
    // Use the navigation controller as the front view controller for SWRevealVC
    let swRevealVC = SWRevealViewController(rearViewController: rearViewController, frontViewController: homeNavController)
    
    swRevealVC?.toggleAnimationType = SWRevealToggleAnimationType.easeOut
    swRevealVC?.toggleAnimationDuration = 0.30
    self.present(swRevealVC!, animated: true, completion: nil)
}

This way, HomeViewController is part of a proper navigation stack from the start. You can add navigation bar elements (like a menu button for SWRevealVC) directly in HomeViewController’s viewDidLoad:

override func viewDidLoad() {
    super.viewDidLoad()
    
    // Add a menu button to trigger SWRevealVC's toggle
    let menuButton = UIBarButtonItem(image: UIImage(named: "menu-icon"), style: .plain, target: self.revealViewController(), action: #selector(SWRevealViewController.revealToggle(_:)))
    self.navigationItem.leftBarButtonItem = menuButton
    
    // Enable pan gesture for SWRevealVC
    self.view.addGestureRecognizer(self.revealViewController().panGestureRecognizer())
}

Second: Adding Navigation Controller in HomeViewController’s Lifecycle (Not Recommended) #

If you absolutely have to add the navigation controller inside HomeViewController (due to specific project constraints), you can embed it as a child view controller instead of presenting it. Presenting would create a modal stack on top of HomeViewController, which breaks natural navigation flow.

Here’s how to do it in viewDidLoad:

override func viewDidLoad() {
    super.viewDidLoad()
    
    // Create navigation controller with self as root
    let navController = UINavigationController(rootViewController: self)
    navController.view.frame = self.view.bounds
    
    // Add as child view controller to embed it
    self.addChild(navController)
    self.view.addSubview(navController.view)
    navController.didMove(toParent: self)
    
    // Customize navigation bar
    self.navigationItem.title = "Home"
}

⚠️ Important Caveats:

• This creates a nested view hierarchy (HomeViewController → UINavigationController → HomeViewController) that can get confusing to debug.
• SWRevealViewController’s swipe gestures might conflict with the navigation controller’s built-in gestures.
• Pushing new view controllers from HomeViewController could lead to unexpected back button behavior.

Final Recommendation #

Stick with the first approach—it’s the standard iOS pattern, keeps your view hierarchy clear, and avoids most potential bugs down the road.

内容的提问来源于stack exchange，提问作者Seize Duh