Ios 未添加栏按钮项

我面临一个问题，我有一个

viewController

，它既有

navigationController

又有

tabBarController

。无论何时在代码中，我尝试添加一个右侧或左侧的

barButtonItem

，甚至向

导航栏添加一个标题

都不会发生任何事情。是因为标签栏吗？或者问题是什么

在

viewDidLoad

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

下面是视图控制器在情节提要中的外观

试试这个

import UIKit

class 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，请尝试此操作

class 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")
    }

}

尝试：

由于您的TabBarController嵌入在NavigationController中，如下所示：

---

UINavigationController->UITabBarcontroller->YourViewController

您的导航控制器的rootviewcontroller是TabbarController 所以，您必须创建自定义的UITabbarController类，然后将源代码推入自定义UITabbarController的viewDidload函数中

树视图控制器将为：NavigationController-->UITabbarController->viewcontroller

或者，您应该在TabBarController中为每个ViewController设置navigationcontroller

---

树视图控制器将是：UITabbarController->NavigationController->viewcontroller

您是否尝试在导航栏中添加按钮？如果是，添加按钮时应显示self.navigationbar。

parentViewController?.navigationItem.rightBarButtonItem = addButton