Question

我想以编程方式在UIBarButtonItem上创建一个popovermenù，这是我编写的代码

    static func setNavigationRightButton(myView: UIViewController) {

    navBarBtn = UIButton(type: .custom)
    navBarBtn.addTarget(myView, action: #selector(pizza.handleFunc(_:)), for: .touchUpInside)
    navBarBtn.frame = CGRect(x: 0, y: 0, width: 33, height: 30)
    navBarBtn.imageView?.contentMode = .scaleAspectFit
    //navBarBtn.setTitle("10", for: .normal)
    setCartBadge()
    navBarBtn.titleLabel?.font = UIFont.systemFont(ofSize: 9)

    let barButton = UIBarButtonItem(customView: navBarBtn)
    myView.navigationItem.rightBarButtonItem = barButton
}

这是动作功能

    func handleFunc(_ sender: UIBarButtonItem!) {
    let vc = storyboard?.instantiateViewController(withIdentifier: "ShoppingCartPopoverVC") as! ShoppingCartPopoverVC
    vc.preferredContentSize = CGSize(width: UIScreen.main.bounds.width, height: 100)
    let navController = UINavigationController(rootViewController: vc)
    navController.modalPresentationStyle = .popover
    let popOver = navController.popoverPresentationController
    popOver?.delegate = self
    popOver?.barButtonItem = sender
    self.present(navController, animated: true, completion: nil)
}

当我在这里“popOver？.barButtonItem = sender”应用程序因此错误而崩溃

由于未捕获的异常'NSInvalidArgumentException'而终止应用程序，原因：' - [UIButton _viewForPresenting]：无法识别的选择器发送到实例0x7faa0b5148f0'

Answer 1

您的目标/操作设置为UIButton，但您的操作方法为发件人指定了UIBarButtonItem而不是UIButton。

您需要更新您的操作：

func handleFunc(_ sender: UIButton) {
    let vc = storyboard?.instantiateViewController(withIdentifier: "ShoppingCartPopoverVC") as! ShoppingCartPopoverVC
    vc.preferredContentSize = CGSize(width: UIScreen.main.bounds.width, height: 100)
    let navController = UINavigationController(rootViewController: vc)
    navController.modalPresentationStyle = .popover
    let popOver = navController.popoverPresentationController
    popOver?.delegate = self
    popOver?.sourceView = sender
    popOver?.sourceRect = sender.bounds
    self.present(navController, animated: true, completion: nil)
}

请注意参数的更改以及弹出控制器上设置的属性。

UIBarButtonItem导致无法识别的选择器发送到实例

1 个答案: