Question

我需要在导航栏中显示我的应用程序图标。为此，我将其添加为右键按钮项。我不希望它是可点击的，我只需要那里的图标，所以我将它设置为禁用。这个问题是图标显示为灰色，而不是绿色。有没有办法禁用此按钮，但也保持原始颜色？

Answer 1

试试这个：

    let barButtonItem = UIBarButtonItem(title: "Click", style: .Done, target: self, action: #selector(didClick(_:)))

    barButtonItem.setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.blueColor()], forState: .Normal)
    barButtonItem.setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.blueColor()], forState: .Disabled)

    barButtonItem.enabled = false
    navigationItem.setRightBarButtonItem(barButtonItem, animated: false)

Answer 2

尝试

[button setBackgroundImage:yourIconImage forState:UIControlStateDisabled];
[button setEnabled:NO]

Answer 3

myBarButtonItem.setBackgroundImage(myIconImage, forState: .Normal, barMetrics: .Default)
myBarButtonItem.setBackgroundImage(myIconImage, forState: .Disabled, barMetrics: .Default)
myBarButtonItem.enabled = false

Answer 4

接受的答案对我不起作用（我认为这是因为我使用的是图像，而不是文字）。

您可以使用自定义视图初始化UIBarButtonItem，因此为了解决问题，我将UIBarButtonItem子类化，以便将UIButton作为初始化器参数。

这是代码。

class TintableBarButtonItem: UIBarButtonItem {

    private(set) var button: UIButton!

    override var tintColor: UIColor? {
        get { return button.tintColor }
        set { button.tintColor = newValue }
    }

    convenience init(button: UIButton) {
        self.init(customView: button)
        self.button = button
        button.imageView?.contentMode = .scaleAspectFit
        button.frame = CGRect(x: 0, y: 0, width: 34, height: 30)            
    }

}

我在ViewController中使用它：

override func viewDidLoad() {
    super.viewDidLoad()
    let button = UIButton()
    let image = #imageLiteral(resourceName: "MyIcon").withRenderingMode(.alwaysTemplate)
    button.setImage(image, for: .normal)
    let barButton = TintableBarButtonItem(button: button)
    navigationItem.rightBarButtonItem = barButton
}

我使用此处的方法获得了框架尺寸： https://stackoverflow.com/a/45374012/6167296

您还必须在按钮上设置目标操作。您可以在此处看到类似的答案：https://stackoverflow.com/a/2796488/6167296

Answer 5

要在整个应用中设置禁用状态的颜色，您可以在AppDelegate的{{1}}中执行以下操作：

application:didFinishLaunchingWithOptions:

Answer 6

快速4.X

let barButtonItem = UIBarButtonItem(title: "Click", style: .done, target: self, action: #selector(didClick(_:)))

barButtonItem.setTitleTextAttributes([NSAttributedStringKey.foregroundColor : UIColor.blueColor()], forState: .normal)
barButtonItem.setTitleTextAttributes([NSAttributedStringKey.foregroundColor : UIColor.blueColor()], forState: .disabled)

barButtonItem.enabled = false
navigationItem.setRightBarButtonItem(barButtonItem, animated: false)

基本上NSForegroundColorAttributeName变成了NSAttributedStringKey.foregroundColor，状态从大写变成了小写.Disabled变成了.disabled等。

Answer 7

SWIFT 5

 let barButtonItem = UIBarButtonItem(title: "Click", style: .done, target: self, action: #selector(didClick(_:)))

 barButtonItem.setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor.blue], for: .normal)
 barButtonItem.setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor.blue], for: .disabled)

 barButtonItem.isEnabled = false
 navigationItem.setRightBarButton(barButtonItem, animated: false)

在iOS中更改禁用栏按钮项的颜色

7 个答案: