在swift中添加UIBarButton项

发布时间：2020-12-14 05:49:00 所属栏目：百科来源：网络整理

导读：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 UIKitclass NavigationBarController: UINavigationController { override func viewDidLoad() { super.viewDidLoad() configureToolbar() } override func didReceiveMemoryWarning(

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？

要将项添加到NavigationController的NavigationBar或添加到ViewController的NavigationBar,您需要首先浏览NavigationItem.尝试这个：

self.navigationItem.setRightBarButtonItems(navigationBarButtonItemsArray,animated: true)

// Or if you just want to insert one item.

self.navigationItem.setRightBarButtonItem(UIBarButtonItem(barButtonSystemItem: .Search,action: "barButtonItemClicked:"),animated: true)

要将按钮切换到左侧,只需将setRightBarButtonItem替换为setLeftBarButtonItem或setLeftBarButtonItems.

（编辑：李大同）

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