新版ios12下，苹果手机运行某项目，提示我必须用Xcode10来编译。
我就安装了Xcode10，但编译得到一个错误：'self' used before 'super.init' call。急着上线！

注：原代码在iOS11下正常编译通过。
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调用方的成员函数如下：
------------------------
    static func showPrize(imgUrl:String?,buttonActionBlock:(()->())?) {
        guard let _imgUrl = imgUrl else { return }
        KingfisherManager.shared.retrieveImage(with: URL.init(string: _imgUrl)!, options: nil, progressBlock: nil) { (image, error, cacheType, url) in
            guard let _image = image else { return }
            
            let backgroundView = UIView(frame: UIScreen.main.bounds)
            backgroundView.backgroundColor = UIColor.black.withAlphaComponent(0.7)
            backgroundView.alpha = 0
            UIApplication.win.addSubview(backgroundView)
            
            let htw_scale = _image.size.height / _image.size.width
            let width = UIScreen.main.ScreenWidth - 48 * 2
            let height = width * htw_scale
            
            let view = AlertView(frame: .init(x: 48, y: ( UIScreen.main.ScreenHeight - height ) / 2.0, width:width , height:height))
            view.backgroundColor = UIColor.white
            view.layer.cornerRadius = 4
            view.layer.masksToBounds = true
            
            let poster = UIImageView.init(image: _image)
            view.addSubview(poster)
            poster.contentMode = .scaleToFill
            poster.snp.makeConstraints { (make) in
                make.edges.equalToSuperview()
            }
            view.alpha = 0
           view.addGestureRecognizer(CLUITapGestureRecognizer.init(block: {[weak view] in
                buttonActionBlock!()
                view?.isHidden = true
                UIView.animate(withDuration: 0.2, animations: {
                    backgroundView.alpha = 0
                }, completion: { (b) in
                    backgroundView.removeFromSuperview()
                    view?.removeFromSuperview()
                })
            }))
            
            UIApplication.win.addSubview(view)
            view.transform = CGAffineTransform.init(scaleX: 0, y: 0)
            UIView.animate(withDuration: 0.3) {
                view.transform = CGAffineTransform.init(scaleX: 1, y: 1)
                backgroundView.alpha = 1
                view.alpha = 1
            }
        }
    }


被调方的整个文件如下：
-----------------------------
import UIKit
class CLUITapGestureRecognizer: UITapGestureRecognizer {
    
    public typealias _ActionBlock = ()->()
    private var _block:_ActionBlock?
    
    deinit {
        CLLog(message: "CLUITapGestureRecognizer dealloc")
    }
    init(block:@escaping(_ActionBlock)) {
        self._block = block
        super.init(target:self, action: #selector(CLUITapGestureRecognizer._action))
    }
    
    @objc private func _action(){
        _block?()
    }
}