UITapGestureRecognizer静态方法崩溃

Question

我有一个带有多个custom UICollectionViewCell的快捷应用程序。所有细胞都有多个对象（无论是UIImageView或UILabel），用户可以点击（因此，我使用多个UITapGestureRecognizers到调用相应的行动。现在，为了减轻我的工作，使代码少重复，我想创造一个extension的UITapGestureRecognizer用static我可以直接在类上调用的方法。

我确实做到了，但是应用程序崩溃的事实意味着有些事情我做得不好。这是我的代码：

extension UITapGestureRecognizer {
    static func addNewTapGuestureRecognizer(for imageView: UIImageView, selectorName: Selector) {
        let tap = UITapGestureRecognizer(target: self, action: selectorName)
        imageView.addGestureRecognizer(tap)
        imageView.isUserInteractionEnabled = true
    }

    static func addNewTapGuestureRecognizer(for label: UILabel, selectorName: Selector) {
        let tap = UITapGestureRecognizer(target: self, action: selectorName)
        label.addGestureRecognizer(tap)
        label.isUserInteractionEnabled = true
    }
}

class TextCVC: UICollectionViewCell {

    override func awakeFromNib() {
        super.awakeFromNib()
        addTapGuesturesForImagesAndLabels()
    }

    func addTapGuesturesForImagesAndLabels() {
        UITapGestureRecognizer.addNewTapGuestureRecognizer(for: postActionShareImageVIew, selectorName: #selector(self.shareImageTapped))
        UITapGestureRecognizer.addNewTapGuestureRecognizer(for: postActionLikeImageVIew, selectorName: #selector(self.likeImageTapped))
    }

    @objc func shareImageTapped() {
        print("share")
    }

    @objc func likeImageTapped() {
    }
}

控制台错误说：

由于未捕获的异常'NSInvalidArgumentException'而终止应用程序，原因：'+ [UITapGestureRecognizer likeImageTapped]：无法识别的选择器发送到类0x1b52e4c50'

Answer 1

问题似乎在这里： let tap = UITapGestureRecognizer(target: self, action: selectorName)

目标不是self，而是UICollectionViewCell的实例。

将您的代码更改为：

static func addNewTapGuestureRecognizer(for imageView: UIImageView, target: Any, selectorName: Selector) {
    let tap = UITapGestureRecognizer(target: target, action: selectorName)
    imageView.addGestureRecognizer(tap)
    imageView.isUserInteractionEnabled = true
}