我的应用程序是简单的应用程序崩溃

我做了一个小程序，用来计算工作中保险柜里的钱。 但更新我的iPhone后崩溃。 我已经尝试了很多，但找不到解决scheme。

当我按下激活以下function的button时发生崩溃：

@IBAction func Knap(sender: AnyObject) {} 

我很新的编码，所以请保持尽可能简单的答案:)

我的应用程序如下所示：

 // // ViewController.swift // Pengeskabstæller // // Created by Alex on 09/07/2016. // Copyright © 2016 Alex. All rights reserved. // import UIKit class ViewController: UIViewController, UITextFieldDelegate { @IBOutlet weak var In50B: UITextField! @IBOutlet weak var In50L: UITextField! @IBOutlet weak var In20B: UITextField! @IBOutlet weak var In20L: UITextField! @IBOutlet weak var In10B: UITextField! @IBOutlet weak var In10L: UITextField! @IBOutlet weak var In5B: UITextField! @IBOutlet weak var In5L: UITextField! @IBOutlet weak var In2B: UITextField! @IBOutlet weak var In2L: UITextField! @IBOutlet weak var In1B: UITextField! @IBOutlet weak var In1L: UITextField! @IBOutlet weak var In05B: UITextField! @IBOutlet weak var In05L: UITextField! @IBOutlet weak var Ialt: UILabel! override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) { view.endEditing(true) } @IBAction func Knap(sender: AnyObject) { //Hvad knappen gør //Ganger input ved værdi af bundt eller løse var x50B: Int = Int(In50B.text!)! x50B = x50B*5000 var x50L:Int = Int(In50L.text!)! x50L = x50L*500 var x20B:Int = Int(In20B.text!)! x20B = x20B*4000 var x20L:Int = Int(In20L.text!)! x20L = x20L*400 var x10B:Int = Int(In10B.text!)! x10B = x10B*2000 var x10L:Int = Int(In10L.text!)! x10L = x10L*200 var x5B:Int = Int(In5B.text!)! x5B = x5B*1000 var x5L:Int = Int(In5L.text!)! x5L = x5L*200 var x2B:Int = Int(In2B.text!)! x2B = x2B*500 var x2L:Int = Int(In2L.text!)! x2L = x2L*50 var x1B:Int = Int(In1B.text!)! x1B = x1B*500 var x1L:Int = Int(In1L.text!)! x1L = x1L*50 var x05B:Int = Int(In05B.text!)! x05B = x05B*200 var x05L:Int = Int(In05L.text!)! x05L = x05L*20 //Lægger det hele sammen let penge1 = (x50B + x50L + x20B) let penge2 = (x20L + x10B + x10L) let penge3 = (x5B + x5L + x2B + x2L) let penge4 = (x1B + x1L + x05B + x05L) let penge99 = String(penge1+penge2+penge3+penge4) //Printer ialt Ialt.text = penge99 } } 

崩溃笔记是：

 2016-10-30 01:13:57.687826 Pengeskabstæller[879:222437] -[Pengeskabstæller.ViewController Knap:]: unrecognized selector sent to instance 0x13fe0aac0 2016-10-30 01:13:57.688704 Pengeskabstæller[879:222437] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Pengeskabstæller.ViewController Knap:]: unrecognized selector sent to instance 0x13fe0aac0' *** First throw call stack: (0x1858641c0 0x18429c55c 0x18586b278 0x185868278 0x18576259c 0x18b6e19a0 0x18b6e1920 0x18b6cbdd0 0x18b6e120c 0x18b6e0d34 0x18b6dbf7c 0x18b6aca44 0x18be99ea8 0x18be93910 0x185812278 0x185811bc0 0x18580f7c0 0x18573e048 0x1871c1198 0x18b717818 0x18b712550 0x1000e9368 0x1847205b8) libc++abi.dylib: terminating with uncaught exception of type NSException 

Answer 1

replace这个：

 @IBAction func Knap(sender: AnyObject) 

有了这个

 @IBAction func Knap(_ sender: AnyObject) 

由于Swift 3你需要在外部参数名称之前添加一个下划线，如果你想省略它。 最可能的原因是你在迁移到Swift 3之前添加了IBActions