我是新来这个网站,请裸露在我身边。 我想在Swift中构建一个简单的计算器,但我不知道如何或为什么我得到错误(“字符串类型的值没有成员类型Int”)或如何解决它。这是到目前为止我的代码:Swift代码错误:类型字符串的值有没有成员Int
class ViewController: UIViewController {
var isTypingNumber = false
var firstNumber = Int!()
var secondNumber = Int!()
var operation = ""
@IBOutlet weak var calculatorDisplay: UILabel!
@IBAction func acButtonTapped(sender: AnyObject) {
}
@IBAction func number7Tapped(sender: AnyObject) {
let number7 = sender.currentTitle
if isTypingNumber{
calculatorDisplay.text = calculatorDisplay.text! + number7!!
}else{
calculatorDisplay.text = number7
isTypingNumber = true
}
}
@IBAction func divideTapped(sender: AnyObject) {
isTypingNumber = false
firstNumber = calculatorDisplay.text?.Int()! **//Error: Value of type 'String' has no member 'Int'**
operation = sender.currentTitle!!
}
@IBAction func equalsTapped(sender: AnyObject) {
isTypingNumber = false
var result = 0
secondNumber = calculatorDisplay.text?.Int()! **//Error: Value of type 'String' has no member 'Int'**
if operation == "+" {
result = firstNumber + secondNumber
} else if operation == "-" {
result = firstNumber - secondNumber
}else if operation == "X" {
result = firstNumber * secondNumber
}else if operation == "÷"{
result = firstNumber/secondNumber
}
calculatorDisplay.text = "\(result)"
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
firstNumber = 0
secondNumber = 0
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
哪儿我去错了吗?
不要滥用武力展开操作符(''!)这样的。 – Alexander