I know that swift array structs are copied by value and not reference. Is there a simple way that I can cast or otherwise pass the array by reference in my prepare(for segue:... method so that I may pass a reference to the array from viewController A to viewController B?
I have seen some answers that refer to passing an array to a function but I simply want to pass it to other viewControllers
Create wrapper class for your array and then pass that class reference wherever you want:
class ArrayWrapper {
let array: [YourType]
init(array: [YourType]) {
self.array = array
}
}
Yes you can achieve it by passing the values from viewController A to viewController B. All you need to do is, take an array (arrB) in ViewController B .
let VB = self.storyboard?.instantiateViewController(withIdentifier: "viewControllerB") as! viewControllerB
vc.arrA = arrA
self.navigationController?.pushViewController(vc, animated: true)
This will not pass reference but the values of area to arrB.
If u want to transfer array from one controller to another controller using segue create array in your first controller like this
var dataSource : [ANY MODEL CLASS] = []
use this method to transfer your data using segue
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if (segue.identifier == "YOURSEGUE") {
let vc = segue.destination as! YOUCONTROLLER
vc.myArray = self.dataSource
}
in your second controller create same type array
var myArray : [ANY MODEL CLASS] = []
so now when you moved to another controller using this "YOURSEGUE" segue your array will have data
create a global array like this
var myGlobalArray = [Int]()
class viewControllerA : UIViewController {
}
now you can use it everywhere. but this is not a good thing
If you cast the array into NSArray it should do the work.
