更新:我找到了一种更好的方法来删除列表的背景而不影响整个应用程序:使用 自省.

Update: I found a much better way to remove a list's background without affecting the whole app: by using Introspect.

import Introspect
import SwiftUI

extension List {
  /// List on macOS uses an opaque background with no option for
  /// removing/changing it. listRowBackground() doesn't work either.
  /// This workaround works because List is backed by NSTableView.
  func removeBackground() -> some View {
    return introspectTableView { tableView in
      tableView.backgroundColor = .clear
      tableView.enclosingScrollView!.drawsBackground = false
    }
  }
}

用法:

List {
  ForEach(items) { item in
    ...
  }
}.removeBackground()

旧答案:

@Asperi 的回答 有效，但仅在调整窗口大小之前有效.这是覆盖 List 颜色的另一种解决方法:

@Asperi's answer works, but only until the window is resized. Here's another workaround for overriding List's color:

extension NSTableView {
  open override func viewDidMoveToWindow() {
    super.viewDidMoveToWindow()

    backgroundColor = NSColor.clear
    enclosingScrollView!.drawsBackground = false
  }
}

一个潜在的缺点是这会影响应用中的所有列表.

A potential downside is that this will affect all lists in the app.