Updating a integer as a label in swift - swift

Question

I want to change the number value of a label by pressing a button. I used to get errors saying you can't put a number in a string, so, I did string(variable). It now displays the basic number, 1, but when I click it, it doesn't update!
Here is how I set up the variable:
First, I set up the button, to IBAction. Here is the code inside of it:
#IBOutlet weak var NumberOfExploits: UILabel!
#IBAction func exploiter(sender: AnyObject) {
var hacks = 0
hacks += 1
NumberOfExploits.text = String(hacks)
}
Can someone help be find out how to get it to change numbers?

Answer 1

First:
let is used for constants, these can not be changed.
var is used for variables.
Second:
Doing plus one is done with += 1 or with = myVariable + 1
var myVariable = 1
myVariable += 1
label.text = string(myVariable)
It is important to understand that your variables only live as long as the enclosing class or function is alive. So when you declare a variable, constant inside a function (using var let is a declaration) it will be be gone when the function is complete. A UIViewcontroller is there for as long as you want it to be. So declare things in there that you will need later.
import UIKit
// things that live here are at the "global level"
// this is a viewcontroller. It is a page in your app.
class ViewController: UIViewController {
// things that live here are at the "class level"
var myClassCounter : Int = 0
// button in interfacebuilder that is connected through an outlet.
#IBOutlet weak var myButton: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
// this is a function that gets called when the view is loaded
}
override func viewDidAppear(animated: Bool) {
// this is a function that gets called when the view appeared
}
// button function from interface builder
#IBAction func myButtonIsTouched(sender: AnyObject) {
// this will be destroyed when the function is done
var myFunctionCounter = 0
myFunctionCounter += 1
// this will be stored at class level
myClassCounter += 1
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}

Answer 2

You can also just do
label.text = "\\(variable)"
which will display the number as string.

Answer 3

Most important declare the variable within the class but outside any function
var variable = 1
then write the IBAction function this way
#IBAction func pressButton(sender : UIButton)
{
label.text = "\(++variable)"
}
The syntax ++variable increments the variable by one.
The syntax "\(v)" creates a string of anything which is string representable