How to insert data to a textfield that goes to an empty array and in turn displays in a label? - arrays

Question

I found this ready code that prints out an already stored array called (let dataArr = ["25","51","57","73","68"]) in rows into a label.
I have now made a text field that can insert to another array(my array = String) I want this array to be swaped with the first array.
But know when I swap to empty array that has already been populated via a text field it doesn’t appear in label.
I was hoping to swap the dataArr to an empty array called array that files up with data when inserted via the text field but for reason when I am doing that it doesn’t get shown in the label I am posting now to see what I am doing wrong.
But when I print the array it appears in the console but not in the label.
let dataArr = ["2,5","5,1","5,7"]
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .yellow
var yPos = 90
for i in 0..<dataArr.count {
let element = dataArr[i]
let labelNum = UILabel()
let num1Nnum2 = "number 1 : \(element)"
labelNum.text = num1Nnum2
labelNum.textAlignment = .center
labelNum.frame = CGRect( x:10, y:yPos, width:250, height: 80)
yPos += 80
self.view.addSubview(labelNum)
}
}
var array = [String]()
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .yellow
var yPos = 90
for i in 0..<array.count {
let element = array[i]
let labelNum = UILabel()
let num1Nnum2 = "number 1 : \(element)"
labelNum.text = num1Nnum2
labelNum.textAlignment = .center
labelNum.frame = CGRect( x:10, y:yPos, width:250, height: 80)
yPos += 80
self.view.addSubview(labelNum)
}
}

Answer 1

Ran your code and got the following result.
Is this what you were expecting?
UPDATE :
Here's what whipped up.
lazy var myText: UITextField = {
let input = UITextField(frame: CGRect(x: 0, y: 0, width: 300, height: 40))
input.backgroundColor = .white
input.placeholder = "Enter data here!"
return input
}()
lazy var enterButton: UIButton = {
let button = UIButton(frame: CGRect(x: 0, y: 0, width: 50, height: 50))
button.backgroundColor = .gray
button.setTitle("ENTER", for: .normal)
button.titleLabel?.font = UIFont.boldSystemFont(ofSize: 11)
button.addTarget(self, action: #selector(btnEnter), for: .touchUpInside)
return button
}()
lazy var doneButton: UIButton = {
let button = UIButton(frame: CGRect(x: 0, y: 0, width: 50, height: 50))
button.backgroundColor = .gray
button.setTitle("Done", for: .normal)
button.titleLabel?.font = UIFont.boldSystemFont(ofSize: 11)
button.addTarget(self, action: #selector(btnDone), for: .touchUpInside)
return button
}()
var array = [String]()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
if (!array.isEmpty) {
view.backgroundColor = .yellow
var yPos = 90
for i in 0..<array.count {
let element = array[i]
let labelNum = UILabel()
let num1Nnum2 = "number 1 : \(element)"
labelNum.text = num1Nnum2
labelNum.textAlignment = .center
labelNum.frame = CGRect( x:10, y:yPos, width:250, height: 80)
yPos += 80
myText.removeFromSuperview()
enterButton.removeFromSuperview()
doneButton.removeFromSuperview()
self.view.addSubview(labelNum)
}
}
else
{
view.backgroundColor = .green
setUpMyText()
setUpEnterButton()
setUpDoneButton()
}
}
private func setUpMyText() {
self.view.addSubview(myText)
myText.translatesAutoresizingMaskIntoConstraints = false
myText.centerXAnchor.constraint(equalTo: self.view.centerXAnchor).isActive = true
myText.centerYAnchor.constraint(equalTo: self.view.centerYAnchor).isActive = true
myText.widthAnchor.constraint(equalToConstant: myText.bounds.width).isActive = true
myText.heightAnchor.constraint(equalToConstant: myText.bounds.height).isActive = true
}
private func setUpEnterButton() {
self.view.addSubview(enterButton)
enterButton.translatesAutoresizingMaskIntoConstraints = false
enterButton.centerXAnchor.constraint(equalTo: self.view.centerXAnchor).isActive = true
enterButton.topAnchor.constraint(equalTo: myText.bottomAnchor, constant: 10).isActive = true
}
private func setUpDoneButton() {
self.view.addSubview(doneButton)
doneButton.translatesAutoresizingMaskIntoConstraints = false
doneButton.centerXAnchor.constraint(equalTo: self.view.centerXAnchor).isActive = true
doneButton.topAnchor.constraint(equalTo: enterButton.bottomAnchor, constant: 10).isActive = true
}
#objc fileprivate func btnEnter() {
print(myText)
array.append(myText.text!)
myText.text = ""
}
#objc fileprivate func btnDone() {
print("Done")
self.viewDidLoad()
}