Vfrdtyky

I want this same statement repeated in all of my projects' viewDidLoad functions. I know I can just manually type it in but I am trying to find a way to increase my code speed. I don't know if I can use a extension file in this.

override func viewDidLoad() {

    super.viewDidLoad()



    let myswitchBoolValuefromFirstVc : Bool = UserDefaults.standard.bool(forKey: "mySwitch")// this is how you retrieve the bool value



    // to see the value, just print those with conditions. you can use those for your things.

    if myswitchBoolValuefromFirstVc == true {

        print("true")

        rosaryCounterLabel.isHidden = false

    }

    else {

        print("false")

        rosaryCounterLabel.isHidden = true

    }

If you are prepared to abuse the Objective-C runtime that UIViewController still uses, you can use method swizzling to do what you ask. https://medium.com/@abhimuralidharan/method-swizzling-in-ios-swift-1f38edaf984f

let aClass: AnyClass! = object_getClass(instance)

let originalMethod = class_getInstanceMethod(aClass, #selector(viewDidLoad))

let swizzledMethod = class_getInstanceMethod(aClass, #selector(newViewDidLoad))

if let originalMethod = originalMethod, let swizzledMethod = swizzledMethod {

    method_exchangeImplementations(originalMethod, swizzledMethod)

}

but I wouldn't recommend it. You trade between discoverability and repetition. In the case where you control all the code, it is going to be easier to maintain using a solution like subclassing that will still require some changes in every view controller.

Create a "master" view controller.

class MasterViewController: UIViewController {



    override func viewDidLoad() {

        super.viewDidLoad()





        //"Global" code here

    }



}

And then inherit in all your other view controllers

class ViewController: MasterViewController{



    override func viewDidLoad() {

        super.viewDidLoad()



        //controller specific code here

    }



}