私の問題は、電卓を作ろうとしたことですが、宣言の問題が予想されるため、これを行いませんでした。予想される宣言に関する他の質問を調べましたが、これを修正しませんでした。
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var Screen: UILabel!
var firstNumber = Int()
var secondNumber = Int()
var isTypingNumber = false
var result = Int()
var operation = ""
@IBAction func number(sender: AnyObject) {
let number = sender.currentTitle
if isTypingNumber == true {
Screen.text = Screen.text! + number!!
} else {
Screen.text = number;
}
isTypingNumber = true
}
@IBAction func operation(sender: AnyObject) {
isTypingNumber = false
firstNumber = Int(Screen.text!)!
operation = sender.currentTitle!!
}
@IBAction func equals(sender: AnyObject) {
secondNumber = Int(Screen.text!)!
if operation == "+" {
result = firstNumber + secondNumber
} else if operation == "-" {
result = firstNumber - secondNumber
} else if operation == "x" {
result = firstNumber * secondNumber
}else {
result = firstNumber / secondNumber
}
Screen.text = "\(result)"
func clear(sender: AnyObject) {
firstNumber = 0
secondNumber = 0
isTypingNumber = false
result = 0
Screen.text = "\(result)"
}
func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}