#意外调用了选择器函数

我正在实现UIToolBar,它有两个按钮,“newdirectory”和“Edit(or Done)”。

请给我任何建议。

补充意见

class DetailViewController: UIViewController {
@IBAction func goBack(_ sender: UIButton) {
    self.dismiss(animated: true, completion: nil)
}

var newDirectory: UIBarButtonItem!
var editDirectory: UIBarButtonItem!
var toolbar: UIToolbar!
let flexibleItem = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
var isEditMode: Bool!

override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.
    toolbar = UIToolbar(frame: CGRect(x: 0, y: self.view.bounds.height - 44, width: self.view.bounds.width, height: 44))
    newDirectory = UIBarButtonItem(title: "New D", style: .plain, target: self, action: #selector(createNewDirectory(_:)))
    newDirectory.isEnabled = false
    newDirectory.tintColor = UIColor.init(white: CGFloat(bitPattern: 0), alpha: CGFloat(bitPattern: 0))

    editDirectory = UIBarButtonItem(title: "Edit", style: .plain, target: self, action: #selector(switchMode(_:)))
    editDirectory.tintColor = self.view.tintColor

    isEditMode = false

    toolbar.items = [newDirectory, flexibleItem, editDirectory]
    self.view.addSubview(toolbar)
}

func createNewDirectory(_ sender: UIBarButtonItem) {
    print("createNewDirectory was called", sender.title!)
}

func switchMode(_ sender: UIBarButtonItem) {
    print("switchMode was called", sender.title!, isEditMode)
    if isEditMode == false {
        isEditMode = true
        newDirectory.isEnabled = true
        newDirectory.tintColor = self.view.tintColor
        sender.title = "Done"

    } else {
        isEditMode = false
        newDirectory.isEnabled = false
        newDirectory.tintColor = UIColor.init(white: CGFloat(bitPattern: 0), alpha: CGFloat(bitPattern: 0))
        sender.title = "Edit"
    }
}
// some other function not related to this post

--

感谢您的宝贵意见!

• 删除了主情节提要和相关设置
• swift类只有AppDelegate.swift和ViewController.swift(代码如下)

import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
        self.window = UIWindow(frame: UIScreen.main.bounds)
        let viewController = ViewController()
        self.window?.rootViewController = viewController
        self.window?.makeKeyAndVisible()

        return true
    }

    func applicationWillResignActive(_ application: UIApplication) {
        // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
        // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
    }

    func applicationDidEnterBackground(_ application: UIApplication) {
        // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
        // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
    }

    func applicationWillEnterForeground(_ application: UIApplication) {
        // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
    }

    func applicationDidBecomeActive(_ application: UIApplication) {
        // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
    }

    func applicationWillTerminate(_ application: UIApplication) {
        // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
    }


}

视图控制器.swift

import UIKit

class ViewController: UIViewController {
    var newDirectory: UIBarButtonItem!
    var editDirectory: UIBarButtonItem!
    var toolbar: UIToolbar!
    let flexibleItem = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
    var isEditMode: Bool!
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        self.view.backgroundColor = UIColor.white
        toolbar = UIToolbar(frame: CGRect(x: 0, y: self.view.bounds.height - 44, width: self.view.bounds.width, height: 44))
        newDirectory = UIBarButtonItem(title: "New D", style: .plain, target: self, action: #selector(createNewDirectory(_:)))
        newDirectory.isEnabled = false
        newDirectory.tintColor = UIColor.init(white: CGFloat(bitPattern: 0), alpha: CGFloat(bitPattern: 0))

        editDirectory = UIBarButtonItem(title: "Edit", style: .plain, target: self, action: #selector(switchMode(_:)))
        editDirectory.tintColor = self.view.tintColor

        isEditMode = false

        toolbar.items = [newDirectory, flexibleItem, editDirectory]
        self.view.addSubview(toolbar)
    }

    @objc func createNewDirectory(_ sender: UIBarButtonItem) {
        print("createNewDirectory was called", sender.title!)
    }

    @objc func switchMode(_ sender: UIBarButtonItem) {
        print("switchMode was called", sender.title!, isEditMode)
        if isEditMode == false {
            isEditMode = true
            newDirectory.isEnabled = true
            newDirectory.tintColor = self.view.tintColor
            sender.title = "Done"

        } else {
            isEditMode = false
            newDirectory.isEnabled = false
            newDirectory.tintColor = UIColor.init(white: CGFloat(bitPattern: 0), alpha: CGFloat(bitPattern: 0))
            sender.title = "Edit"
        }
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}