How to make an array show up on a label one by one

Question

I am trying to make words in an array show up one at a time on a label, but with my code, the last word in the array shows up. What I want is for my label to display Hello [wait] (a certain amount of time preferably adjustable at some point) World [wait] Testing [wait] Array

Here's my code:

import UIKit

// Variables
let stringOfWords = "Hello World. Say Hello. Test Number One."
let stringOfWordsArray = stringOfWords.components(separatedBy: " ")

class ViewController: UIViewController {
   // Outlets
   @IBOutlet weak var labelWords: UILabel!


    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        for word in stringOfWordsArray  {
            labelWords.text=(word)
        }
    }
}

I want to be able to have an adjuster for how fast the words show up and a start and stop button. If anyone can help me with that main part that would be great.

https://stackoverflow.com/questions/25951980/do-something-every-x-minutes-in-swift — Tomasz Pe, Feb 17 '18 at 20:02

Tomasz Czyżak · Accepted Answer · 2018-02-17T19:46:09.950

The simplest approach is to use Timer so you will be able to call start/stop it and adjust time (2 seconds in example below):

var timer: Timer?
var wordIndex = 0

override func viewDidLoad() {
    super.viewDidLoad()
    timer = Timer.scheduledTimer(timeInterval: 2, target: self, selector: #selector(update), userInfo: nil, repeats: true)
}

@objc func update() {
    label.text = stringOfWordsArray[wordIndex]
    if wordIndex < (stringOfWordsArray.count - 1) {
        wordIndex += 1
    }
    else {
        // start again ...
        wordIndex = 0
    }
}

@IBAction func startAction(_ sender: Any) {
    timer = Timer.scheduledTimer(timeInterval: 2, target: self, selector: #selector(update), userInfo: nil, repeats: true)
}

@IBAction func stopAction(_ sender: Any) {
    // remember to invalidate and nil it when you leave view
    timer?.invalidate()
    timer = nil;
}

How to make an array show up on a label one by one

1 Answers1