为什么该操作无法连接到目标 class NSViewController？

Question

我正在努力学习Swift，但我似乎一直卡在这个（诚然，可能很简单）问题上——错误如下：

Could not connect action, target class NSViewController does not respond to -(encbutton/decbutton)

这是我的代码。我正在 Storyboard 中设计我的界面，并通过 @IB(Outlet/Action).

将其连接到代码

// ViewController.swift
import Cocoa
import Foundation

class TabViewController: NSTabViewController {
// This has been changed from NSViewController to NSTabViewController as I have replaced the initial single-view with a two-tab-view.

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
    }

    override var representedObject: AnyObject? {
        didSet {
        // Update the view, if already loaded.
        }
    }

}

public class EncViewController: NSViewController {
    // This is for the first tab, encrypt

    @IBOutlet var encdirfield: NSTextField!
    @IBOutlet var encpassfield: NSSecureTextField!
    @IBOutlet var enclogfield: NSTextField!

    @IBOutlet var encbutton: NSButton!

    @IBAction func startenc(sender: NSButton) { // here's the problem. the function isn't triggered when the button is pressed
        // get values
        encdir = encdirfield.stringValue
        encpass = encpassfield.stringValue

        tarcrypt.enc();
        // this is an function that leads to an NSTask that runs a binary I wrote (not related).
        // definitely not the cause of the problem because running it independently works fine
    }


}

public class DecViewController: NSViewController {
    // and this is for the second tab, decrypt      

    @IBOutlet var decdirfield: NSTextField!
    @IBOutlet var decpassfield: NSSecureTextField!
    @IBOutlet var declogfield: NSTextField!

    @IBOutlet var decbutton: NSButton!
    @IBAction func startdec(sender: NSButton) { // here's the same problem, again. the function isn't triggered when the button is pressed
        // get values
        encdir = encdirfield.stringValue
        encpass = encpassfield.stringValue

        tarcrypt.dec();
        // this is an function that leads to an NSTask that runs a binary I wrote (not related).
        // definitely not the cause of the problem because running it independently works fine
    }

}

出于某种原因，在绘制场景和 NSButton 时，会生成如上所示的错误消息。是什么导致了错误，我该如何解决？

Answer 1

听起来好像您将 UI 元素连接到 File's Owner 对象，它是 NSApplication 的一个实例。

如果您还没有这样做，您希望将 NSObject 从 Xcode 4 中的对象库面板拖到布局左侧的空白处。完成并选择它后，选择身份检查器，然后在 Class 字段中输入 "WindowController"

Answer 2

我想通了！对于遇到此问题的任何其他人，以下是解决方法：

原来 "Custom Class" 下有一个标题为 "Module" 的小下拉菜单，默认情况下设置为 none。将其设置为 tarcrypt（或任何适合您的可用选项），这应该可以修复错误。

感谢大家的帮助！

Answer 3

Swift 5 和 Xcode 13.3

最近我遇到了同样的错误。我通过将 viewcontroller class 名称重新分配给 nameclass.swift 文件中的 class 并使用我的项目激活 MODULE 条目来解决它名称（在下拉菜单之后）。

为什么该操作无法连接到目标 class NSViewController？

Why would the action not be able to connect to target class NSViewController?

nsbutton

swift

Swift 5 和 Xcode 13.3