除EditMode外,如何禁用删除滑动手势?

发布于 2025-02-08 05:07:13 字数 1019 浏览 1 评论 0原文

任何人都可以告诉我如何禁用导航视图中项目列表的删除滑动操作,同时保留在NavigationView处于编辑模式时删除列表项目的功能。

我已经尝试根据EditMode环境变量有条件地将封闭或零向OnDelete修饰符传递给OnDelete修饰符,但这似乎对我不起作用。我还试图使用删除词,但是当传递给这些修饰符时,Swift似乎忽略了我的状态变量的变化。

以下是一些示例代码来重现我遇到的问题:

@State private var list = [1,2,3,4,5]
@State private var editMode = EditMode.inactive
    
var body: some View {
   NavigationView {
      List {
         ForEach(list, id: \.self) { item in
            Text("\(item) \(String(self.editMode.isEditing))")
         }
         .onDelete(perform: self.editMode.isEditing ? { index in list.remove(atOffsets: index) } : nil)
         .deleteDisabled(!self.editMode.isEditing) // <-- Always disables delete, even in edit mode
      }
      .navigationBarItems(leading: EditButton(), trailing: Text(editMode == .active ? "Editing" : "Not Editing"))
      .environment(\.editMode, $editMode)
  }
}

有趣的是,列表中的项目和导航栏更新中的尾随文本,就像应该在EditMode更改时一样,但是EditMode的更改似乎完全被忽略OnDelete和DeletEdisabled修饰符似乎在同一范围内。

我正在使用Xcode 14.0 beta。

Can anyone tell me how to disable the Delete swipe action for a list of items inside a NavigationView, while retaining the ability to delete list items when the NavigationView is in edit mode.

I have tried conditionally passing a closure or nil to the onDelete modifier, based on the editMode environment variable, but this doesn't seem to work for me. I also tried to use deleteDisabled, but Swift seems to ignore the change in my state variable, when passed to those modifiers.

Below is some sample code to reproduce the problem I have:

@State private var list = [1,2,3,4,5]
@State private var editMode = EditMode.inactive
    
var body: some View {
   NavigationView {
      List {
         ForEach(list, id: \.self) { item in
            Text("\(item) \(String(self.editMode.isEditing))")
         }
         .onDelete(perform: self.editMode.isEditing ? { index in list.remove(atOffsets: index) } : nil)
         .deleteDisabled(!self.editMode.isEditing) // <-- Always disables delete, even in edit mode
      }
      .navigationBarItems(leading: EditButton(), trailing: Text(editMode == .active ? "Editing" : "Not Editing"))
      .environment(\.editMode, $editMode)
  }
}

Interestingly, the items in the list and the trailing Text in the navigation bar update just like they are supposed to whenever the editMode changes, but the change in editMode seems to be completely ignored by the onDelete and deleteDisabled modifiers, which appear to be in the same scope.

I am using Xcode 14.0 Beta.

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