未添加栏按钮项

Question

我遇到问题，我的viewController同时包含navigationController和tabBarController。每当在代码中我尝试添加向右或向左barButtonItem或甚至为navigationBar添加标题时都不会发生任何事情。是因为标签栏吗？或者问题可能是什么

viewDidLoad

中的

let addButton = UIBarButtonItem(title: "Add", style: .Plain, target: self, action: #selector(ProfileVC.addNewService))
navigationItem.rightBarButtonItem = addButton

这里是视图控制器在故事板中的外观

Answer 1

尝试：

parentViewController?.navigationItem.rightBarButtonItem = addButton

因为您的TabBarController嵌入在NavigationController中，如下所示：

UINavigationController - ＆gt; UITabBarcontroller - ＆gt; YourViewController

Answer 2

试试这个

导入UIKit

类ViewController：UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()

    let addButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Refresh, target: self, action: "buttonMethod")
    navigationItem.leftBarButtonItem = addButton

    navigationController?.navigationBar.barTintColor = UIColor.greenColor()

}

func buttonMethod() {
    print("Perform action")
}

}

正在使用自定义栏按钮试试这个

类ViewController：UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()

   let btnName = UIButton()
   btnName.setImage(UIImage(named: "imagename"), forState: .Normal)
   btnName.frame = CGRectMake(0, 0, 30, 30)
   btnName.addTarget(self, action: Selector("action"), forControlEvents: .TouchUpInside)

   //.... Set Right/Left Bar Button item
   let rightBarButton = UIBarButtonItem()
   rightBarButton.customView = btnName
   self.navigationItem.rightBarButtonItem = rightBarButton

}

func action() {
    print("Perform action")
}

}

Answer 3

您的navigationcontroller的rootviewcontroller是TabbarController 所以你必须创建自定义的UITabbarController类，然后将你的源代码推送到自定义UITabbarController的viewDidload函数。

树视图控制器将是： NavigationController - ＆gt; UITabbarController-＆GT;的ViewController

或者您应该为TabBarController中的每个ViewController设置navigationcontroller

树视图控制器将是： UITabbarController-＆gt; NavigationController-＆gt; ViewController