如何禁用替换，插入绘图，查找，学习，说话，说话，在UItext字段上暂停

Question

我在uipickerview中有一个uitextfield，我正在尝试禁用任何类型的格式，我已经使用UIResponderStandardEditActions来禁用随之而来的所有操作，但我不知道如何禁用替换，插入绘图，查找，学习，说话和暂停在文本字段上。

禁用 UITextfield 上的格式设置

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

不要尝试列出所有可能的选项器以返回 false。颠倒你的逻辑。如果选择器是要启用的菜单项的选择器，则返回 true。否则返回 false。