swift - 无法识别的选择器发送到实例

Question

我想这个问题很容易被归类为重复问题，但搜索后找不到答案。

在我的tableView的cellForRowAt内

let chooseProfilePhotoPicker = ChooseProfilePhotoPicker(rootVC: self)
chooseProfilePhotoPicker.cropVC.delegate = self
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(chooseProfilePhotoPicker.iconImageViewTapped(_:)))
cell.iconImageView.addGestureRecognizer(tapGesture)

以及ChooseProfilePhotoPicker 类:

class ChooseProfilePhotoPicker: NSObject, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    var rootController: UIViewController

    init(rootController: UIViewController) {
        self.rootController = rootController
    }

    func iconImageViewTapped(_ recognizer: UITapGestureRecognizer) {

        var pickerController = UIImagePickerController()
        pickerController.delegate = self
        pickerController.sourceType = UIImagePickerControllerSourceType.photoLibrary

        rootController.present(myPickerController!, animated: true, completion: nil)
    }
}

当我点击 iconImageView 时应用程序崩溃

Answer 1

如果操作应该在ChooseProfilePhotoPicker实例中运行，您必须相应地设置目标:

let tapGesture = UITapGestureRecognizer(target: chooseProfilePhotoPicker, action: #selector(chooseProfilePhotoPicker.iconImageViewTapped(_:)))