内部tabbar viewcontrollers导航栏更改不适用于storyboard

Question

我创建了

  

NavigationController（Main） - ＆gt; LoginViewController - ＆gt; Tabbarviewcontroller - ＆gt; HomeViewController

如果我通过storyboard在HomeViewController中添加barbutton项目，它就不会在模拟器中显示。

但我可以看到故事板中的变化。

标题Home1和barbutton项目未在模拟器中显示

Answer 1

首先在NavagationController中隐藏导航栏，然后创建自定义栏。在栏中添加所需的栏。

Answer 2

您可以通过编程方式尝试

HomeViewController ---

override func viewWillAppear(animated: Bool) { 
    super.viewWillAppear(true) 
    let barButtomitem = UIBarButtonItem(barButtonSystemItem: .Done, target: self, action: #selector(handler)) 
    self.tabBarController?.navigationItem.rightBarButtonItem = barButtomitem
}

SecondItemViewController -

override func viewWillAppear(animated: Bool) {
    super.viewWillAppear(true)
    self.tabBarController?.navigationItem.rightBarButtonItem = nil
}

并且不要在故事板中添加按钮...

Answer 3

试用此代码：在Swift 3中测试：

注意：删除所有barButtonItems并尝试下面的代码。

将此代码添加到Home1 VC：

override func viewWillAppear(_ animated: Bool) {
    let RightButtomitem = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(handler)) 
    self.tabBarController?.navigationItem.rightBarButtonItem = RightButtomitem
}

func handler(sender:UIButton) {
    print("Add Button pressed")
}

将此代码添加到Home2 VC：

override func viewWillAppear(_ animated: Bool) {
    let RightButtomitem = UIBarButtonItem(barButtonSystemItem: .done, target: self, action: #selector(handler)) 
    self.tabBarController?.navigationItem.rightBarButtonItem = RightButtomitem
}

func handler(sender:UIButton) {
     print("Done Button Pressed")
}

输出：