iOS Swift

In that case, you can just keep an Array of all the information you wanna show, and then just iterate over and display that, because the user only needs information once (and not infinitely over and over again). That would just look something like this:

class ViewController: UIViewController{
    var infoForDisplay = ["Some", "Information", "That", "Will", "Be", "Displayed", "To", "The", "User"]
    @IBAction func displayInfo() -> Void{
        for info in infoForDisplay{
            // The best way to do this is probably with a UITableView or something similar, but I'll simply use print as the display function for now
            print(info)
        }
    }
}

how can i add the condition to print those element in an array each time the user click a button?

Hey Franklin,

There's a ton of good information in this thread already. If you only want to print the contents of the array a single time then you can do it like this. If you want to do it infinitely, which has already not been suggested, you would use recursion.

@IBAction func buttonPressed(sender: UIButton) {
    infoForDisplay.forEach { print($0) }    
}

If you only want to print the array every time someone clicks the button, you just need the for each loop:

for element in array {
    print(element)
}

You'll have to put that for each loop inside a function connected to the button in question. If you don't know how to connect a button in the User Interface to a method in the View Controller, these videos should help you:

https://teamtreehouse.com/library/build-a-simple-iphone-app-with-swift-20/view-controllers-and-views/creating-iboutlets

https://teamtreehouse.com/library/build-a-simple-iphone-app-with-swift-20/view-controllers-and-views/using-ibaction-to-execute-methods

If you haven't done so already, I'd recommend going through the course these videos come from:

https://teamtreehouse.com/library/build-a-simple-iphone-app-with-swift-20

Please can you make an example?

Alright. But what do you want your stopping condition to be? The way you've described your function, it looks like you want to create a function that runs forever printing the contents of the array, which generally isn't a good practice in computer coding. I've set up the function so that it prints all the elements in the array a certain number of times, but it'd be pretty easy to modify that function so that it prints indefinitely, if that's truly what you want. I wouldn't recommend turning this into a function that goes on forever with no way to stop it, though.

func printForever<Element>(array: Array<Element>) {
    let maxPrints = 20
    var currentPrint = 0
    while (currentPrint < maxPrints) {
        for element in array {
            print("\(element)")
        }
        currentPrint += 1
    }
}

If you're dead set on making a function that prints forever with no way to stop it, you can just get rid of maxPrints, get rid of currentPrint, get rid of the line of code that increments currentPrint, and put true in the parentheses where the condition for the while loop is.

These solutions are also valid. But it'd probably be better to use generics for the function.

func printArrayInfinitely<Element>(array: Array<Element>) -> Void{
    for element in array{
        print(element)
    }
    printArrayInfinitely(array)
}

Either will work, but I suppose generics are more Swifty than just just an [AnyObject]. I'll update my answer accordingly. Thanks for the tip!

You're welcome!