struct not keeping tuples order when passed (swift3) - ios

Question

My Code produces a a tuples that is displayed on a label on view controller 1. I tried struct the label from vc1 to vc2 but the order is not being kept. All I want to do is replicate the exact order and the way the tuple is displayed on vc 1, on VC 2.
VIEW CONTROLLER 1
import UIKit
var number = [Int]()
var yourArray = [String]()
class ViewController: UIViewController {
#IBOutlet var labez: UILabel!
#IBOutlet var textA: UITextField!
#IBOutlet var textB: UITextField!
#IBAction func move(_ sender: Any) {
bad.mm = [String( labez.text ?? "")]
}
#IBAction func store(_ sender: Any) {
yourArray.append((textA.text!))
number.append(Int(textB.text!)!)
let tuples = zip(yourArray,number)
let sorted = tuples.sorted(by: { this, next in
if this.0 < next.0 {
return true
} else if this.0 == next.0 {
return this.1 < next.1
} else {
return false
}
})
print(sorted)
labez.text = sorted.map { " \($0)" }.joined(separator:"\n")
bad.mm = [String(describing: sorted.map { " \($0)" }.joined(separator:"\n")
)]
}
struct bad {
static var mm = [String]()
}
}
view controller 2
import UIKit
class ViewController2: UIViewController {
#IBOutlet var benCarson: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
benCarson.text = (String(describing: ViewController.bad.mm))
}
}

Answer 1

Besides my critique of how you designed your data and your naming conventions. I believe what you want is to ASSIGN your bad.mminstead of APPEND.
What is happening is the first time you enter values to bad.mm it is (a, 2). Then when it is appended you add the sorted arrays (a, 1), (a, 2) to the existing string, making it (a, 2), (a, 1), (a, 2) If you assign it it will be now just the new, sorted array, (a, 1), (a, 2).
To assign change
bad.mm.append(String(describing: sorted.map { " \($0)" }.joined(separator:"\n"))
In ViewController class to
bad.mm = String(describing: sorted.map { " \($0)" }.joined(separator:"\n")
In ViewController your move function does a similar thing where it APPENDS to bad.mm where you probably want to assign. However you assign it with a UITextField.Text property which is optional. Using the ?? operator you can give unwrap this optional while providing it a default value. An empty string is often a good default value. So for this I would suggest changing the line inside of #IBAction func move to the following:
bad.mm = labez.text ?? ""
Or just actually delete this line since you assign bad.mm and labez.text at the same time in your earlier function. But that is why you were getting the optional() around your text.
That should give you your desired effect. The reason your "tuple" isn't being passed in the right order is that your not grabbing the sorted tuple from one VC to the next, you are grabbing an improperly formatted string from one VC to another. Consider passing the sorted tuple directly and then formatting the string separately in both ViewControllers to reduce confusion.

Answer 2

Why don't you use prepare(for segue: instead of a struct to pass the tuples.
You can do it like this:
In ViewController:
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// give your segue an id (in the interface builder)
if segue.identifier == "mySegue" ,
let nextScene = segue.destination as? ViewController2 {
nextScene.yourTuples = yourArray // or anything else
}
}
And in your ViewController2:
class ViewController2: UIViewController {
val yourTuples: [String]()!
#IBOutlet var benCarson: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
benCarson.text = (String(describing: ViewController.bad.mm))
}
}