iOS Swift，将ViewController中的变量传递给同一ViewController中的类

Question

I have a ViewController (A), which takes the output (quantity) of a swift class "QuantityMatrix { var qMatrix = [["1", "2", "3"], ["4", "5", "6"]] // returns quantity}" and performs some action.

The code works fine if I provide the qMatrix to the RateMatrix Class. But, now I want to generate the variable qMatrix from other View Controller (B) and use it in the QuantityMatrix class.

I am not getting how to pass the qMatrix from the View Controller (B). can anyone help?

ex:

Class ViewControllerA: UIViewController {
var qMatrix = QuantityMatrix() 

// uses the 'quantity' returned from QuantityMatrix class to perform some action
}

Class QuantityMatrix {
var qMatrix:[[String]] = [["1", "2", "3"], ["4", "5", "6"]]
//
.
.
return quantity
} 

The above works fine, but now instead of directly using the [["1", "2", "3"], ["4", "5", "6"]] values, I am generating these values from another viewcontroller (B). For this, I need to pass the variable generated in B controller to QuantityMatrix. Can anyone tell how?

I am new. So please explain. Thanks.

Answer 1

You will need to provide a reference from from View Controller A to View Controller B, then it can simply ask for the values by calling a func.

The best place to do this is often in prepareForSegue, though it will depend on how you're opening the views.