Ios 当我按下任何按钮时，我的应用程序都崩溃了

如何在工具类和工具定义中使用选择器？我的代码创建了一些错误。请告诉我如何解决此错误

错误：当我按下任何按钮时，我的应用程序崩溃

class BarButton{
    static func items(navigationItem: UINavigationItem) {
        //Hide Back Button
        navigationItem.hidesBackButton = true

        //Add Label to Left of NavigationBar
        let leftLabel = UIBarButtonItem(title: "", style: .plain, target: self, action: nil)
        leftLabel.tintColor = UIColor.init(red: 30/255, green: 104/255, blue: 140/255, alpha: 1)
        navigationItem.setLeftBarButton(leftLabel, animated: false)

        //List Button
        let btnList = UIButton(frame: CGRect(x: 0, y: 0, width: 35, height: 22))
        btnList.setImage(UIImage(named:"list-icn"), for: .normal)
        btnList.addTarget(self, action: #selector(listBtn), for: .touchUpInside)
        let rightBarBtn1 = UIBarButtonItem.init(customView: btnList)
        rightBarBtn1.tintColor = UIColor(red: 30/255, green: 104/255, blue: 140/255, alpha: 1)

        //Notification Button
        let btnList2 = UIButton(frame: CGRect(x: 0, y: 0, width: 22, height: 22))
        btnList2.setImage(UIImage(named:"notification-icn"), for: .normal)
        btnList2.addTarget(self, action: #selector(notificationBtn), for: .touchUpInside)
        let rightBarBtn2 = UIBarButtonItem.init(customView: btnList2)
        rightBarBtn2.tintColor = UIColor(red: 30/255, green: 104/255, blue: 140/255, alpha: 1)
        navigationItem.setRightBarButtonItems([rightBarBtn1, rightBarBtn2], animated: true)
    }

    @objc func listBtn() {
        print("List Btn")
    }

    @objc func notificationBtn() {
        print("Notification Btn")
    }
}

---

您的

listbn

和

notificationBtn

方法是实例方法，但您尝试在类而不是类实例上调用它们-您的

项

方法是

静态的

，因此它内部的

self

是

AnyObject.Type

类型

要修复它，请将

listbn

和

notificationBtn

方法设置为静态。

尝试此操作并查看：

let btnList = UIButton(frame: CGRect(x: 0, y: 0, width: 35, height: 22))
btnList.setImage(UIImage(named:"list-icn"), for: .normal)

// Update selector
btnList.addTarget(self, action: #selector(BarButton.listBtn(sender:)), for: .touchUpInside)
let rightBarBtn1 = UIBarButtonItem.init(customView: btnList)
rightBarBtn1.tintColor = UIColor(red: 30/255, green: 104/255, blue: 140/255, alpha: 1)


//Notification Button
let btnList2 = UIButton(frame: CGRect(x: 0, y: 0, width: 22, height: 22))
btnList2.setImage(UIImage(named:"notification-icn"), for: .normal)

// Update selector
btnList2.addTarget(self, action: #selector(BarButton.notificationBtn(sender:)), for: .touchUpInside)
let rightBarBtn2 = UIBarButtonItem.init(customView: btnList2)
rightBarBtn2.tintColor = UIColor(red: 30/255, green: 104/255, blue: 140/255, alpha: 1)
navigationItem.setRightBarButtonItems([rightBarBtn1, rightBarBtn2], animated: true)


// Try using static
@objc static func listBtn(sender: Any)
{
    print("List Btn")
}

// Try using static
@objc static func notificationBtn(sender: Any)
{
    print("Notification Btn")
}

---

请尝试在日志中查看崩溃消息以了解有关崩溃的详细信息。要在实用程序类中执行此操作，并在所有视图控制器中使用该类以在导航栏中显示这些按钮。NSForwarding:警告：类“DEAdmin.BarButton”的对象0x1003e7640未实现methodSignatureForSelector:--遇到故障无法识别的选择器+[DEAdmin.BarButton listBtnWithSender:]2018-04-05 16:57:38.503235+0530 DEAdmin[4381:2316382]无法识别的选择器+[DEAdmin.BarButton listBtnWithSender:]