在swift中点击按钮即可显示上下文菜单

Question

在iOS中，可以通过长按或轻触来显示上下文菜单。目前，下面的代码显示了长按下的上下文菜单，我如何在轻触上显示菜单？

    let interaction = UIContextMenuInteraction(delegate: self)
    tagBtn.addInteraction(interaction)

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

      let favorite = UIAction(title: "Favorite",
        image: UIImage(systemName: "heart.fill")) { _ in
        // Perform action
      }

      let share = UIAction(title: "Share",
        image: UIImage(systemName: "square.and.arrow.up.fill")) { action in
        // Perform action
      }

      let delete = UIAction(title: "Delete",
        image: UIImage(systemName: "trash.fill"),
        attributes: [.destructive]) { action in
         // Perform action
       }

       return UIContextMenuConfiguration(identifier: nil,
         previewProvider: nil) { _ in
         UIMenu(title: "Actions", children: [favorite, share, delete])
       }
    }

Answer 1

UIContextMenuInteraction仅适用于上下文(长按)菜单。

如果希望按钮的主要操作显示菜单，只需创建一个UIMenu并将其直接分配给button.menu属性，然后设置button.showsMenuAsPrimaryAction = true，如下所示：

let favorite = UIAction(title: "Favorite",
  image: UIImage(systemName: "heart.fill")) { _ in
  // Perform action
}

...

let button = UIButton()
button.showsMenuAsPrimaryAction = true
button.menu = UIMenu(title: "", children: [favorite, ...])