Master Detail with a UISplitViewController without StoryBoards

split.swift

import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

	var window: UIWindow?

	func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
		
		let viewController = SplitVc()
		
		let window = UIWindow(frame: UIScreen.mainScreen().bounds)
		window.rootViewController = viewController
		window.makeKeyAndVisible()
		self.window = window
		
		return true
	}
}

class SplitVc : UISplitViewController, UISplitViewControllerDelegate {
	
	override func viewDidLoad() {
		
		self.delegate = self
		let master = UINavigationController()
		let detail = UINavigationController()
		master.viewControllers = [TableVc()]
		detail.viewControllers = [DetailVc()]
		self.viewControllers = [master, detail]
	}
	
	func splitViewController(splitViewController: UISplitViewController, collapseSecondaryViewController secondaryViewController: UIViewController, ontoPrimaryViewController primaryViewController: UIViewController) -> Bool {
		
		if let nc = secondaryViewController as? UINavigationController {
			if let topVc = nc.topViewController {
				if let dc = topVc as? DetailVc {
					let hasDetail = Thing.noThing !== dc.thing
					return !hasDetail
				}
			}
		}
		return true
	}
}


class TableVc : UITableViewController {
	
	override func viewDidLoad() {
		self.title = "Things"
		self.tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "cell")
	}
	
	override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
		return Repo.sharedRepo.allThings.count;
	}
	
	override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
		let thing = Repo.sharedRepo.allThings[indexPath.row]
		let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath)
		cell.textLabel?.text = thing.name;
		return cell
	}
	
	override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
		
		let thing = Repo.sharedRepo.allThings[indexPath.row]
		
		let vc = DetailVc()
		vc.thing = thing
		
		let nc = UINavigationController()
		nc.viewControllers = [vc]
		
		self.showDetailViewController(nc, sender: self)
	}
}

class DetailVc : UIViewController {
	var thing : Thing = Thing.noThing
	
	override func viewWillAppear(animated: Bool) {
		self.title = thing.name
		self.view.backgroundColor = thing.color
		
		if let svc = self.splitViewController {
			
			let ni = self.navigationItem
			ni.setLeftBarButtonItem(svc.displayModeButtonItem(), animated: false)
			ni.leftItemsSupplementBackButton = true;
			
		}
		
		super.viewWillAppear(animated)
	}
}


class Repo {
	
	var allThings : [Thing]
	
	class var sharedRepo : Repo {
		struct Static {
			static let instance = Repo()
		}
		return Static.instance
	}
	
	init() {
		allThings = [
			Thing(name: "Red", color: UIColor.redColor()),
			Thing(name: "Green", color: UIColor.greenColor()),
			Thing(name: "Blue", color: UIColor.blueColor()),
		]
	}
}

class Thing {
	
	let name : String
	let color : UIColor
	
	init(name : String, color : UIColor) {
		self.name = name
		self.color = color
	}
	
	class var noThing : Thing {
		struct Static {
			static let instance = Thing(name: "No Thing", color: UIColor.grayColor())
		}
		return Static.instance
	}
}

@thang-nm Insulting somebody who provides a potentially useful snippet of code to the community is unnecessary. If you have concrete suggestions, you're free to provide those, or fork & improve it. Otherwise, calm down & move on.

This was very useful. Thanks!

That's great! It helped me a lot. Thank you very much. Just consider reducing the number of spaces of your indentation. It will increase the readability of your code.

Additionally, there are some cool style guides you can follow and improve you code even more. Thanks!