UIContextMenuActionProvider 在项目上放置不需要的复选标记图标

Question

问题

我正在实施UIContextMenuInteraction，最终出现了我无法解释或找到修复的行为。从屏幕截图中可以看出菜单项有复选标记的问题。这不是故意的，这些复选标记是自动添加的。理想情况下，我想使用SF Symbols，但我添加的任何图像最终都会成为这个复选标记。即使我将图像设置为 nil，它仍然会添加这个奇怪的复选标记。

采取的其他步骤：重新安装 SF Symbols 和 SF Pro、清理构建、重新启动 xCode/模拟器

转载：模拟器 iOS 13.3、iPhone 7 iOS 13.3

系统： Catalina 10.15.1，xCode 11.3.1

代码：

import UIKit

class ViewController: UIViewController {

  let sampleView = UIView(frame: CGRect(x: 50, y: 300, width: 300, height: 200))

  override func viewDidLoad() {
    super.viewDidLoad()

    view.addSubview(sampleView)
    sampleView.backgroundColor = .systemIndigo


    let interaction = UIContextMenuInteraction(delegate: self)
    sampleView.addInteraction(interaction)
  }
}

extension ViewController: UIContextMenuInteractionDelegate {

  func contextMenuInteraction(
    _ interaction: UIContextMenuInteraction,
    configurationForMenuAtLocation location: CGPoint
  ) -> UIContextMenuConfiguration? {

    let actionProvider: UIContextMenuActionProvider = { [weak self] _ in

      let like = UIAction(
        title: "Like",
        image: UIImage(systemName: "heart"),
        identifier: nil,
        discoverabilityTitle: nil,
        attributes: [],
        state: .on
      ) { _ in

      }

      let copy = UIAction(
        title: "Copy",
        image: nil,
        identifier: nil,
        discoverabilityTitle: nil,
        attributes: [],
        state: .on
      ) { _ in

      }

      let delete = UIAction(
        title: "Delete",
        image: UIImage(systemName: "trash"),
        identifier: nil,
        discoverabilityTitle: nil,
        attributes: [.destructive],
        state: .on
      ) { _ in

      }

      return UIMenu(
        title: "",
        image: nil,
        identifier: nil,
        options: [],
        children: [
          like, copy, delete
        ]
      )
    }


    let config = UIContextMenuConfiguration(identifier: nil, previewProvider: nil, actionProvider: actionProvider)

    return config

  }

}

Answer 1

你需要改变UIAction.state，从.on以.off摆脱对号。