Pfthb

I have an application, completely written in code so no storyboards, which sets the rootViewController in the AppDelegate to TabBarController. This is a custom class of UITabBarController which sets up all views, adds the corresponding ViewControllers inside and sets a NavigationController for each ViewController.

// didFinishLaunchingWithOptions
window = UIWindow(frame: UIScreen.main.bounds)
window?.makeKeyAndVisible()

let MainScreen = TabBarController()
self.window?.rootViewController = MainScreen

Now, it all works, but I want to add a slide-out menu from the left to display a couple of settings. I want a button on the main screen on the left (inside the NavigationController) and when I click it, I want the menu to slide in, pushing the current ViewController to the right accordingly. A great example is when you click your own profile picture on the top left side of the feed in Twitter.

I thought about a couple of ways to implement this, have read a lot online and seen examples, which often use third party plugins or storyboards, which I don't want. Other examples seem to work but not with a TabBarController.

I would like to use a UIScrollView to accomplish this by setting the contentSize to 1.5 times the UIScreen width, opening the app launches to x-value of half the screen width so the ViewController is shown, then on tapping the button the x-value changes to 0 to show the menu. That's the plan. However, I seem unable to add the TabBarController (which is not a UIView but a UITabBarController) to my SlideController (custom UIViewController with UIScrollViewDelegate). Any suggestions how I can implement this? This is my SlideController, which will become my RootViewController, so far:

import UIKit

class SlideController: UIViewController, UIScrollViewDelegate 

 override func viewDidLoad() 

 view.addSubview(scrollableView)
 scrollableView.delegate = self

 

 func scrollViewDidScroll(_ scrollView: UIScrollView) 

 print("scroll to: x ", scrollView.contentOffset.x, " y ", scrollView.contentOffset.y)

 

 var scrollableView: UIScrollView = 

 let scrollableView = UIScrollView()
 let scrollableWidth = UIScreen.main.bounds.width + (UIScreen.main.bounds.width * 0.5)
 scrollableView.frame = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height)
 scrollableView.contentSize = CGSize(width: scrollableWidth, height: UIScreen.main.bounds.height)
 scrollableView.backgroundColor = .white
 scrollableView.showsHorizontalScrollIndicator = true
 scrollableView.showsVerticalScrollIndicator = true
 scrollableView.alwaysBounceHorizontal = true
 scrollableView.alwaysBounceVertical = true

 return scrollableView

 ()

Basically, what I want to ask is: how can I add the UITabBarController that is my current rootViewController to the UIScrollView? Secondly, is this a great idea or are there other solutions that might work better? Open to all suggestions and ideas.

Cheers guys!