ios - 如何在 CNContactPickerViewController 中隐藏“组”和取消按钮？

Question

我正在使用 CNContactPickerViewController，我想隐藏我尝试过的取消和组 contactPickerViewController.navigationItem.leftBarButtonItem = nil按钮

contactPickerViewController.navigationItem.hidesBackButton = true

但这不起作用..这是我创建控制器的代码

let contactPickerViewController = CNContactPickerViewController()

    contactPickerViewController.predicateForEnablingContact = NSPredicate(format: "phoneNumbers.@count > 0",
        argumentArray: nil)

    contactPickerViewController.delegate = self
    contactPickerViewController.navigationItem.leftBarButtonItem = nil
    contactPickerViewController.navigationItem.hidesBackButton = true

    presentViewController(contactPickerViewController, animated: true, completion: nil)

帮助任何人？谢谢