ios - SwiftUI中的选择器

我正在尝试使用在SwiftUI中为UIKit创建的第三方库，例如BetterSegmentedControl库(https://github.com/gmarm/BetterSegmentedControl)
需要选择器女巫使用objc函数来处理用户输入。

在SwiftUI中甚至没有办法解决这个问题？

struct ContentView : UIViewRepresentable {
    func makeUIView(context: Context) -> BetterSegmentedControl {
        BetterSegmentedControl()
    }


    func updateUIView(_ view: BetterSegmentedControl, context: Context) {
        let control = BetterSegmentedControl(
            frame: CGRect(x: 0, y: 0, width: 300, height: 44),
            segments: LabelSegment.segments(withTitles: ["One", "Two", "Three"],
                                            normalTextColor: .lightGray,
                                            selectedTextColor: .white),
            index: 1,
            options: [.backgroundColor(.darkGray),
                      .indicatorViewBackgroundColor(.blue)])

        view.addSubview(control)

        @objc func controlValueChanged(_ sender: BetterSegmentedControl) {

        }

        control.addTarget(self, action: #selector(controlValueChanged(_:)), for: .valueChanged)
        view.addSubview(control)

    }
}

对于此代码，有2个错误:

@objc can only be used with members of classes, @objc protocols, and concrete extensions of classes


Argument of '#selector' cannot refer to local function 'controlValueChanged'

最佳答案

我最终添加了一个帮助器类:

struct MainView: View {

let helper = MainViewHelper()

// somewhere, sometimes...
vc.navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .cancel, target: self.helper, action: #selector(self.helper.closeAction))

}

class MainViewHelper {
  @objc func closeAction() {
    // whatever
  }
}

关于ios - SwiftUI中的选择器，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/56867114/