除了WWDC video - 44:18和sample project之外,在线信息很少。
因此,
actionProvider
在被调用时具有suggestedActions
的列表 由系统传递给它。这可以是
UIMenu
和UIAction
的混合,因此可能是完全 从系统中拾取的构造层次结构。这些可以 是您使用新用户界面在响应者链中定义的事物 iOS 13中引入的命令API或 其他系统组件。所以我们在这里做一个完全自定义的菜单,所以 我们将suggestedActions
放在一边。首先,我们将创建 我们的编辑菜单。
但是到目前为止,我了解到的是给定标识符可以具有预定义的uggestedActions。 suggestionActions
与任何标识符都没有关联。如果我更改该标识符,则suggestedActions
不会更改。它似乎基于它的上下文,在这里我猜我是在tableviewcell的上下文中...
我正在尝试查看它的外观,但是什么都没有显示。如果我点击单元格,则不会显示任何内容。
class ViewController: UIViewController {
let tableview: UITableView = {
let tv = UITableView()
tv.frame = UIScreen.main.bounds
return tv
}()
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(tableview)
tableview.register(UITableViewCell.self, forCellReuseIdentifier: "cell")
tableview.delegate = self
tableview.dataSource = self
}
}
extension ViewController: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
var cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
if cell.detailTextLabel == nil {
cell = UITableViewCell(style: .value1, reuseIdentifier: "cell")
}
cell.textLabel?.text = "Honey"
cell.detailTextLabel?.text = "iOS developer"
return cell
}
@available(iOS 13.0, *)
func tableView(_ tableView: UITableView, contextMenuConfigurationForRowAt indexPath: IndexPath, point: CGPoint) -> UIContextMenuConfiguration? {
return UIContextMenuConfiguration(identifier: nil, previewProvider: nil, actionProvider: { suggestedActions in
print("suggestedActions", suggestedActions)
let menu = UIMenu(title: "", children: suggestedActions)
return menu
})
}
}
我还打印了suggestedActions
,结果是:
- 0 : <UIMenu: 0x6000008e6790; title = Standard Edit; identifier = com.apple.menu.standard-edit; options = (Inline); children = <NSArray: 0x600001318900>>
- 1 : <UIMenu: 0x6000008e6820; title = Replace; identifier = com.apple.menu.replace; options = (Inline); children = <NSArray: 0x6000008e64c0>>
- 2 : <UIMenu: 0x6000008e7330; title = Text Style; identifier = com.apple.menu.text-style; image = <UIImage:0x60000349c870 symbol(system: bold.italic.underline) {36, 17} baseline=3.66667,contentInsets={1, 2, 1, 2},alignmentRectInsets={-2.9999999999999982, 0, -0.33333333333333348, 0} config=<(null), traits=(UserInterfaceIdiom = Phone, DisplayScale = 3, DisplayGamut = P3, HorizontalSizeClass = Compact, VerticalSizeClass = Regular, UserInterfaceStyle = Light, UserInterfaceLayoutDirection = LTR, PreferredContentSizeCategory = L)>>; children = <NSArray: 0x6000008e6df0>>
- 3 : <UIMenu: 0x6000008e6d00; title = Lookup; identifier = com.apple.menu.lookup; options = (Inline); children = <NSArray: 0x60000049c870>>
- 4 : <UIMenu: 0x6000008e7060; title = Learn; identifier = com.apple.menu.learn; options = (Inline); children = <NSArray: 0x60000049c220>>
- 5 : <UIMenu: 0x6000008e6d90; title = Speech; identifier = com.apple.command.speech; options = (Inline); children = <NSArray: 0x6000008e6490>>
- 6 : <UIMenu: 0x6000008e7180; title = Share; identifier = com.apple.menu.share; options = (Inline); children = <NSArray: 0x60000049c6a0>>
- 7 : <UIMenu: 0x6000008e6a30; title = Writing Direction; identifier = com.apple.menu.writing-direction; options = (Inline); children = <NSArray: 0x6000006fe1c0>>