Problems with returning a value from a method in one class, and using the most updated value in another class

Question

Hey,

I have a function in a class that returns a boolean value TRUE only if a button is clicked. I also have another class that has a function that requires to know this boolean value.

To be able to access the boolean value, i have my variable declared as global and initialized to FALSE, and i change its value in the function of the first class.

I access this variable perfectly fine, but I just never get the updated value in the second class. I checked to see if my code enters the function, and it does. I think I am having problems returning the most updated value to the second class. I only get the initialized value of the bool variable.

CODE IN FIRST CLASS:

      var cookButtonClicked = false

      @IBAction func Cook(sender: AnyObject) {
        cookClicked()
        }

      func cleanerClicked() -> Bool{

        cleanerButtonClicked  = true
        return cleanerButtonClicked
        }

CODE IN SECOND CLASS:

     if (laborViewController.cleanerButtonClicked.boolValue){
    print("Success")
      }else{
           print("wrong value passed")
       }

Thanks

Answer 1 · 2015-01-02T05:03:28Z

January 2, 2015 5:03am

HeyYouseef,

None of the code you posted seems to be making sense?

First you posted

var cookButtonClicked = false

Which creates a variable that stores a bool set to false.

The second thing you posted was your IBAction that when pressed calls the function 'cookClicked'

@IBAction func Cook(sender: AnyObject) {
       cookClicked()
}

I can't see what this method does as you have not posted the function in your code example.

The third thing posted is the function 'cleanerClicked' which from your example looks like it's never called.

func cleanerClicked() -> Bool{
        cleanerButtonClicked  = true
        return cleanerButtonClicked
 }

If you've simply done a mistake with your naming that's your problem, we all make mistakes sometimes.

Otherwise it could be that you simply cannot simply access a variable by stating the viewController in which it sits. You need to use 'prepareForSegue' which allows you to pass variables between ViewControllers. You would simply update your bool in your function, check to see that it's updated and then pass the updated variable to your second ViewController. If you need to pass it back it gets a bit tricker and involves delegates which really aren't fun!

Thanks, Alex

Answer 2 · 2015-01-06T18:30:02Z

January 6, 2015 6:30pm

Hey Yousef,

You shouldn't have Views connected to the same View Controller. That's a really bad idea. You can't segue within the same View Controller as it can only be used to send information between View Controllers, but not backwards. If you need to send data back you'll need to use a delegate which isn't fun.

Thanks, Alex

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Youseef Al Taher

Youseef Al Taher

Problems with returning a value from a method in one class, and using the most updated value in another class

2 Answers

dungeonkeeperhf

dungeonkeeperhf

Youseef Al Taher

Youseef Al Taher

Youseef Al Taher

Youseef Al Taher

dungeonkeeperhf

dungeonkeeperhf

Youseef Al Taher

Youseef Al Taher