Array of buttons Swift 3

Question

if function "Savedata" is called, I add new button into [UIbutton] and I add new element into array [[Double]]. I want, for every button on index [i] to display data in array [[Double]] on index [i]. How shall I do the loop?

 @IBAction func Savedata(_ sender: Any) {

    subjectsznamky.insert(arrayx, at: 0) //subjectsznamky is the [[Double]] array

var button : UIButton
            button = UIButton(type: .system) as UIButton
            button.frame = CGRect(x:5, y: 20, width: 100.0, height: 30)
            button.setTitle(ourname, for: .normal)
            self.view.addSubview(button)
            buttons.append(button)

   for i in buttons.indices {
                buttons[i].frame.origin.y += 30
                buttons[i].addTarget // here I need to create the function, that every button on index [i] displays data in subjectsznamky on index[i]


}

Thank you.

Do you have to insert into the array at element 0? Can you just append? If you can just append, you could use the buttons' tag field to store the matching array index. When a button is tapped, look at the sender button's tag and reference into the array. — Graham Perks
– Graham Perks, Commented Jan 20, 2017 at 18:47

Frankie · Accepted Answer · 2017-01-20 20:10:33Z

This is likely not an ideal way to manage your views or display data in your application. You should consider a UITableView instead.

That being said...

Maybe you can try something like this, keeping track of your buttons and values in a dictionary instead of a separate array. You'd still need an array specifically for your buttons though if you're trying to preserve order.

var hashes = [UIButton : [Double]]()
var buttons = [UIButton]()

@IBAction func saveData(_ sender: Any) {

    var button = UIButton(type: .system)
    button.frame = CGRect(x:5, y: 20, width: 100.0, height: 30)
    button.setTitle(ourname, for: .normal)
    self.view.addSubview(button)
    buttons.append(button)

    hashes[button] = arrayx

    for button in buttons {
        button.frame.origin.y += 30
        button.addTarget(self, action: #selector(MyClass.disaplayData(_:)), for: .touchUpInside)
    }
}

func displayData(_sender: UIButton) {
    if let doubleArray = hashes[sender] {
        print(doubleArray)
    }
}

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