隐藏视图控制器的导航栏

Question

我试图隐藏单个视图控制器的导航控制器没有运气,导航栏被隐藏为第一个vc,但它没有显示第二个vc.

这是我在第一个vc中使用的代码:

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

    // Hide the Navigation Bar
    self.navigationController?.setNavigationBarHidden(true, animated: animated)
}

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)

    // Show the Navigation Bar
    self.navigationController?.setNavigationBarHidden(false, animated: animated)
}

swift 4有什么变化？该代码在swift 3中有效...

Answer 1

使用代码: - Swift 4

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(true)
// Hide the Navigation Bar
        self.navigationController?.setNavigationBarHidden(true, animated: true)
    }

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(true)
// Show the Navigation Bar
        self.navigationController?.setNavigationBarHidden(false, animated: false)
    }

我认为你做错了 animated: true