Swift UITapGestureRecognizer 未调用

Question

一个非常简单的问题，但比它应该解决的要难得多：我的手势很简单，根本就没有打电话。我正在使用显示在 zstack 内部的 uiviewrepresentable。如果我直接将 .tapgesture{} 添加到 CameraView() ，它就可以正常工作。但是我需要得到点击位置

public struct CameraView: UIViewRepresentable {
    @EnvironmentObject var ue: UserEvents
    public func makeUIView(context: Context) -> UIView {
        let view = UIView(frame: UIScreen.main.bounds)
        let focusGesture = UITapGestureRecognizer(target: self, action: #selector(context.coordinator.tapFocus(_:)))
        self.ue.cameraPreview = AVCaptureVideoPreviewLayer(session: ue.session)
        self.ue.cameraPreview.frame = view.frame
        self.ue.cameraPreview.videoGravity = ue.videoGravity
        self.ue.session.startRunning()
        view.isUserInteractionEnabled = true
        view.layer.addSublayer(self.ue.cameraPreview)
        focusGesture.numberOfTapsRequired = 1
        view.addGestureRecognizer(focusGesture)
        return view
    }
    
    public func updateUIView(_ uiView: UIViewType, context: Context) { }
    
    public func makeCoordinator() -> Self.Coordinator {
        return Coordinator()
    }
    
    public class Coordinator: NSObject {
        @objc public func tapFocus(_ sender: UITapGestureRecognizer) {
            print("tap")
        }
    }
}

Answer 1

目标应该是 coordinator（它是一个持久实体，不同于瞬态视图），而不是 self。

let focusGesture = UITapGestureRecognizer(target: context.coordinator, action: #selector(context.coordinator.tapFocus(_:)))

Swift UITapGestureRecognizer 未调用

Swift UITapGestureRecognizer not calling

swift

swiftui

uiviewrepresentable