How can i push other viewcontroller in drawercontroller?

[SiuyuenChow]

How can i push other viewcontroller in drawercontroller?

[Yancerva]

Hi! SiuyuenChow, I wondering the same, and i find out how to set a Push other views using a protocol. like this:
1- create the protocol:

protocol NavigationProtocol: class {
func navigationProtocol(view: UIViewController)
}

2- Use Your MenuView to set the protocol instance

• in the menuSide viewController class -

weak var navigationProtocol: NavigationProtocol?

3- set the protocol instance to pass the view using mainView.. this is very tricky because we go to the app delegate and tell what view will control the protocol function, and this will be the MainViewController... so, we go to the appDelegate. I put code if you not using storyboards and of course if you use storyboards... its really the "same thing"

I got this code on the app delegate... (NOT USING STORYBOARDS)

• in the didFinishWithLaunchingWithOptions func -
  window = UIWindow(frame: UIScreen.main.bounds)
  window?.makeKeyAndVisible()

  let mainView = ViewController()
  let navigation = UINavigationController(rootViewController: mainView)
  let menuView = MenuSideViewController()

  menuView.navigationProtocol = mainView <- this is we need

  menuViewController.mainViewController = navigation
  menuViewController.drawerViewController = menuView
  window?.rootViewController = menuViewController

(USING STORYBOARDS)

     let mainStoryboard = UIStoryboard(name: "Main", bundle: Bundle.main)
        guard
            let mainView = mainStoryboard.instantiateViewController(withIdentifier: "NavigationMainId") as? UINavigationController,   
            let menuView = mainStoryboard.instantiateViewController(withIdentifier: "MenuViewId") as? MenuViewController else { return false }

        menuView.navigationProtocol = mainView         <- this is we need 
        "Set in the storyboard the navigation id in the UINavigationController
          - Identity Inspector
          - Identity
          - Storyboard Id "

        menuViewController.mainViewController = mainView
        menuViewController.drawerViewController = menuView
        window?.rootViewController = menuViewController
        window?.makeKeyAndVisible()

4- at this point we got an error in the appdelegate because we don't have the protocol implemented on the MainView.. so, we go to the MainView, or better, create a file called ProtocolMainVew(or the name of the main view you have, like this ProtocolMainViewController) and do this.

extension MainViewController: NavigationProtocol {
func navigationProtocol(view: UIViewController) {
navigationController?.pushViewController(view, animated: true)
}
}

5-Using the procotol to push the views...
if you have a tableview or collection view in your MenuSide...
go to de didSelectRow or didSelectitem in case of collectionView... and for example if we have 3 items in the table or collection, you can do something like this..

let item = indexPath.row
switch item {
case 0:
let view = SomeViewController()
navigationProtocol?.navigationProtocol(view: view)
case 1:
let view = OtherViewController()
navigationProtocol?.navigationProtocol(view: view)
default:
break
}
appDelegate?.menuViewController.setDrawerState(.closed, animated: true)

and that's all... but one thing I dont know how pop the views when I put the menu on the navigation buttons for each view I set in the menu, maybe with another protocol I guess, but with this the navigation always will be the MainView. if you find how pop the views if you put the menu in every view you call in the menuSide, please let me know, and cheers!

[SiuyuenChow]

HI @Yancerva:
For now I've implemented it in the form of a notification

[Yancerva]

can you show how can I do that? using - NSNotification I guess?

[Millapptech]

Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value: file project_name/KYDrawerController.swift
to set self._drawerConstraint.constant = 0