這是我的代碼。每次點擊addButton時,我都會收到一個無法識別的選擇器發送到實例崩潰/錯誤。我找了一個答案的過去一小時,找不到一個答案。請幫忙。添加目標時發生快捷錯誤
@IBOutlet var addButton: UIButton!
@IBOutlet var resetButton: UIButton!
var number:Int = 0
override func viewDidLoad() {
super.viewDidLoad()
let size: CGSize = self.view.frame.size;
countLabel.frame = CGRect(x: 0, y:0, width: size.width, height: size.height/4)
minusButton.frame = CGRect(x:0, y: size.height/4, width: size.width/2, height: size.height/8);
addButton.frame = CGRect(x:0, y:size.height/4 + size.height/8, width: size.width, height: 5*size.height/8)
resetButton.frame = CGRect(x:size.width/2, y: size.height/4, width: size.width/2 ,height: size.height/8)
addButton.addTarget(self, action: #selector(addNumber(sender:)), for: UIControlEvents.touchUpInside)
minusButton.addTarget(self, action: #selector(minusNumber), for: UIControlEvents.touchUpInside)
resetButton.addTarget(self, action: #selector(resetNumber), for: UIControlEvents.touchUpInside)
}
func addNumber(sender: UIButton!) {
number = number + 1
countLabel.text = String(number)
}
[編輯]用完整的錯誤消息你的問題。 – rmaddy