ios - 如何禁用替换、插入绘图、查找、学习、说话、说话..、在 UI 文本字段上暂停？

Question

我在 uipickerview 中有一个 uitextfield，我试图禁用任何类型的格式，我使用 UIResponderStandardEditActions 来禁用随之而来的所有操作，但我不知道如何禁用替换，在文本字段上插入绘图、查找、学习、说话和暂停。

在 UITextfield 上禁用格式

override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
if action == #selector(cut(_:)) ||
   action == #selector(copy(_:)) ||
   action == #selector(UIResponderStandardEditActions.paste(_:)) ||
   action == #selector(UIResponderStandardEditActions.select(_:)) ||
   action == #selector(UIResponderStandardEditActions.selectAll(_:)) ||
   action == #selector(UIResponderStandardEditActions.delete(_:)) ||
   action == #selector(UIResponderStandardEditActions.toggleBoldface(_:)) ||
   action == #selector(UIResponderStandardEditActions.toggleItalics(_:)) ||
   action == #selector(UIResponderStandardEditActions.toggleUnderline(_:)) ||
   action == #selector(UIResponderStandardEditActions.increaseSize(_:)) ||
   action == #selector(UIResponderStandardEditActions.decreaseSize(_:)) ||
   action == #selector(UIResponderStandardEditActions.makeTextWritingDirectionLeftToRight(_:)) ||
   action == #selector(UIResponderStandardEditActions.makeTextWritingDirectionRightToLeft(_:))
    {
        return false
    }
    return true
}

Answer 1

不要试图列出所有可能返回 false 的选择器。颠倒你的逻辑。如果选择器是您要启用的菜单项的选择器，则返回 true。否则返回假。