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Replied In error invoke API
Is not error…
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Replied In error invoke API
Help me please… I’m blocked 😭
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Replied In Exception NSException * "[<Calculus_area_and_perimeter.ViewController 0x14c506020> setValue: forUndefinedKey:]: this class is not key value coding-compliant for the key calcArea." 0x0000600002799cb0.
the code: import UIKit class ViewController: UIViewController {     @IBOutlet weak var larghezzaField: UITextField!          @IBOutlet weak var altezzaField: UITextField!          @IBOutlet weak var result: UILabel!          override func viewDidLoad() {         super.viewDidLoad()         // Do any additional setup after loading the view.     }        @IBAction func TotArea(_ sender: UIButton) {         if let L = Double(larghezzaField.text!) {             if let H = Double(altezzaField.text!) {                 result.text = String (L * H)             } else                 {result}         }     }     @IBAction func calcPerimetro(_ sender: UIButton) {     }     @IBAction func cancella(_ sender: UIButton) {     } }