Update UILabel text in loop - swift

Question

I have a UILabel that needs to change its text to the next item in an array after a certain amount of time. I'm using a for-in loop to achieve this. My issue, though, is that the label won't change until the loop is complete, which defeats the purpose. I have done a lot of searching, and it seems as though using dispatch_async(dispatch_get_main_queue()... is the way to do this. I have tried to use it as other people have, but it doesn't update the label's text. So, if someone could help me use it in my code, or has a solution to update the text in the loop, it would be appreciated.
My code:
#IBAction func startEndTouch(sender: AnyObject) {
var wordsPerMinVal:Double = 60.0/sliderValueBen
for item in textEnterGo {
delay(wordsPerMinVal){
self.yourWordsLabel.text = item
print(item)
}
}
}
Two places I got some info from:
dslkfjsdlfjl & Rob
Vacawama

Answer 1

try it:
var textEnterGo:[String] = ["1","2","3","4","5","6","7","8","9","10"]
var wordsPerMinVal:Double = 0
var timer:NSTimer?
#IBAction func startEndTouch(sender: AnyObject) {
if timer != nil{
index = 0
self.lblText.text = ""
timer!.invalidate()
timer = nil
}
wordsPerMinVal = 1
self.timer = NSTimer.scheduledTimerWithTimeInterval(self.wordsPerMinVal, target: self, selector: #selector(ViewController.setTextForLabel), userInfo: nil, repeats: true)
}
var index:Int = 0
func setTextForLabel(){
self.lblText.text = self.textEnterGo[index]
index += 1
if index > self.textEnterGo.count-1{
index = 0
}
}