iOS rightBarButtonItem on UINavigationController in swift

Question

我试图将rightBarButtonItem放在UINavigationViewController堆栈的第二个视图控制器上。

我正在创建并设置我想要显示的视图控制器的viewDidLoad按钮。我的实际代码如下所示：

override func viewDidLoad() {
    super.viewDidLoad()
    menu_button_ = UIBarButtonItem(image: UIImage(named: "menu"),
        style: UIBarButtonItemStyle.Plain ,
        target: self, action: "OnMenuClicked:")

    self.navigationController!.navigationItem.rightBarButtonItem = menu_button_
}

我遗漏了什么？按钮没有出现。

Answer 1

应该将menu_button_设置为viewController的rightBarButtonItem，而不是navigationController。

试一试

self.navigationItem.rightBarButtonItem = menu_button_

而不是

self.navigationController!.navigationItem.rightBarButtonItem = menu_button_

Answer 2

试着跟随code.，它对我是有效的。

let homeButton : UIBarButtonItem = UIBarButtonItem(title: "LeftButtonTitle", style: UIBarButtonItemStyle.Plain, target: self, action: "")

let logButton : UIBarButtonItem = UIBarButtonItem(title: "RigthButtonTitle", style: UIBarButtonItemStyle.Plain, target: self, action: "")

self.navigationItem.leftBarButtonItem = homeButton
self.navigationItem.rightBarButtonItem = logButton

如果你想解决custom image，那么请查看下面的苹果指南。

ref/doc/uid/TP40006556-CH21-SW1

Answer 3

在Swift 5

//For righter button item
let rightBtn = UIBarButtonItem(image: UIImage(named: "rightmenu"), style: .plain, target: self, action: #selector(onClickMethod))//Change your function name and image name here
self.navigationItem.rightBarButtonItem = rightBtn
//self.navigationItem.rightBarButtonItem = [rightBtn, anotherBtn] //If you want to add more buttons add like this

//This is your function
@objc func onClickMethod() {
    print("Left bar button item")
}