Question

我正在尝试将UIBarButton项添加到导航栏。

这是我的导航栏类声明：

import UIKit

class NavigationBarController: UINavigationController {

    override func viewDidLoad() {
        super.viewDidLoad()

        configureToolbar()        
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    // #pragma mark - Navigation bar data source

    func configureToolbar() {
        let toolbarButtonItems = [
            searchBarButtonItem
        ]
        toolbar.setItems(toolbarButtonItems, animated: true)
    }

    var searchBarButtonItem: UIBarButtonItem {
        return UIBarButtonItem(barButtonSystemItem: .Search, target: self, action: "barButtonItemClicked:")
    }
}

编译器没有错误，但我得到的只是一个简单的导航栏。

如何显示UIBarButtonItem？

Answer 1

要将项目添加到NavigationBar的{{1}}或添加到NavigationController的{{1}}，您需要首先浏览NavigationBar。试试这个：

ViewController

要将按钮切换到左侧，只需将NavigationItem替换为self.navigationItem.setRightBarButtonItems(navigationBarButtonItemsArray, animated: true) // Or if you just want to insert one item. self.navigationItem.setRightBarButtonItem(UIBarButtonItem(barButtonSystemItem: .Search, target: self, action: "barButtonItemClicked:"), animated: true)或setRightBarButtonItem。

Answer 2

您可以在导航栏的右侧或左侧添加多个按钮。我会告诉你在右侧添加你也可以为左侧做同样的事情

override func viewDidLoad()
{
    let Nam1BarBtnVar = UIBarButtonItem(barButtonSystemItem: .Edit, target: self, action: #selector(Nam1BarBtnKlkFnc(_:)))
    let Nam2BarBtnVar = UIBarButtonItem(barButtonSystemItem: .Add, target: self, action: #selector(Nam2BarBtnKlkFnc(_:)))

    self.navigationItem.setRightBarButtonItems([Nam1BarBtnVar, Nam2BarBtnVar], animated: true)
}

func Nam1BarBtnKlkFnc(BtnPsgVar: UIBarButtonItem)
{
    print("Nam1BarBtnKlk")
}

func Nam2BarBtnKlkFnc(BtnPsgVar: UIBarButtonItem)
{
    print("Nam2BarBtnKlk")
}

Answer 3

针对Swift 3进行了更新：

使用以下代码以编程方式添加UIBarButton项目。

添加左栏按钮：

y-axis

添加右侧栏按钮：

  self.navigationItem.leftBarButtonItem = UIBarButtonItem(image: #imageLiteral(resourceName: "your_image_name"), style:  UIBarButtonItemStyle.plain, target: self, action: #selector(yourViewControllerName.barButtonClickAction))

方法定义：

  self.navigationItem.rightBarButtonItem = UIBarButtonItem(image: #imageLiteral(resourceName: "your_image_name"), style:  UIBarButtonItemStyle.plain, target: self, action: #selector(yourViewControllerName.barButtonClickAction))

在swift中添加UIBarButtonitem

3 个答案: