Custom View TextField How To Calculate TextField Sum - ios

Question

I am working on iOS application in swift 3.0 where I am creating custom view with textfield and button calculate values for all text filed and display the sum of all textfield on the top totalText.
Code for MainViewController:
#IBOutlet weak var totalText: UITextField!
var totalview:[UIView]!
override func viewDidLoad() {
yvalue = 1
tag = 1
count = 1
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
#IBAction func actionButton(_ sender: UIButton) {
yvalue = 55 + yvalue
//for i in 0...count {
extraview = View(frame: CGRect(x: 50, y: 75+yvalue, width: 350, height: 50))
extraview.backgroundColor = UIColor(white: 1, alpha: 0.5)
extraview.layer.cornerRadius = 15
extraview.tag = tag
print("ExtraView tag=",extraview.tag)
extraview.ActionButtonsub.addTarget(self, action: (#selector(cancelbutton(_:))), for: UIControlEvents.touchUpInside)
extraview.textFiled.addTarget(self, action: #selector(didChangeTexts(textField:)), for: .editingChanged)
extraview.textFiled.tag = tag
print("text tag=",extraview.textFiled.tag)
self.view.addSubview(extraview)
count = count + 1
tag = tag + 1
//}
}
func cancelbutton(_ sender: UIButton) {
extraview.removeFromSuperview()
}
func didChangeTexts(textField: UITextField) {
totalText.text = extraview.textFiled.text
}
Code for UIView:
class View: UIView {
#IBOutlet var subView: UIView!
#IBOutlet weak var textFiled: UITextField!
#IBOutlet weak var ActionButtonsub: UIButton!
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
Bundle.main.loadNibNamed("View",owner: self, options:nil)
self.addSubview(self.subView)
}
override init(frame: CGRect) {
super.init(frame: frame)
Bundle.main.loadNibNamed("View", owner: self, options: nil)
subView.frame = bounds
self.addSubview(self.subView)
}
}
Sample Output

Answer 1

If you think #Scriptable way is complex then go like below..
Simple way, you can add those textfields into one collection while creating & looping it when you need to do something.

Answer 2

Something like this should work, may need a little modification.
You just need to iterate through the subviews, get the textfield for each view, convert to double value and add them up along the way.
func calculateTotal() -> Double {
var total: Double = 0.0
for subview in self.view.subviews {
if let v = subview as? View, !v.textFiled.isEmpty {
total += Double(v.textFiled.text)
}
}
return total
}

Answer 3

An alternative is applying filter, flatMap and reduce functions
let sum = (view.subviews.filter{$0 is View} as! [View]) // filters all `View` instances
.flatMap{$0.textFiled.text} // maps all text properties != nil
.flatMap{Double($0)} // maps all values which are convertible to Double
.reduce(0.0, {$0 + $1}) // calculates the sum