xcode 更改 iOS 中禁用栏按钮项的颜色
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Change color of disabled bar button item in iOS
提问by Laura M
I need to display my app's icon in the navigation bar. To do this, I have added it as a right bar button item. I don't want it to be clickable, I just need the icon there, so I set it to disabled. The problem with this is the icon appears grey, instead of green. Is there a way to disable this button but also keep it's original color?
我需要在导航栏中显示我的应用程序图标。为此，我已将其添加为右侧栏按钮项。我不希望它可点击，我只需要那里的图标，所以我将它设置为禁用。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同时保持其原始颜色？
回答by J.Wang
Try this:
尝试这个：
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)
回答by wossoneri
try
尝试
[button setBackgroundImage:yourIconImage forState:UIControlStateDisabled];
[button setEnabled:NO]
回答by MH175
The accepted answer does not work for me (I think it's because I'm using an image, not text).
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，而不是文本）。
You can initialize a UIBarButtonItem using a custom view, so in order to solve the issue I subclassed UIBarButtonItem so that it takes a UIButton as an initializer argument.
您可以使用自定义视图初始化 UIBarButtonItem，因此为了解决这个问题，我将 UIBarButtonItem 子类化，以便它采用 UIButton 作为初始化参数。
Here is the code.
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)
}
}
And I used it like this in my ViewController:
我在我的 ViewController 中像这样使用它：
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
}
I got the frame dimensions using the method here: https://stackoverflow.com/a/45374012/6167296
我使用这里的方法获得了框架尺寸：https: //stackoverflow.com/a/45374012/6167296
You will also have to set the target-actions on the button itself. You can see a similar answer here: https://stackoverflow.com/a/2796488/6167296
您还必须在按钮本身上设置目标操作。你可以在这里看到类似的答案：https: //stackoverflow.com/a/2796488/6167296
回答by Albert Bori
To set the color for disabled state across the entire app, you can do the following once in your AppDelegate's application:didFinishLaunchingWithOptions::
要在整个应用程序中设置禁用状态的颜色，您可以在AppDelegate's 中执行以下操作application:didFinishLaunchingWithOptions:：
let attributes: [String: Any] = [
NSForegroundColorAttributeName: UIColor.red.withAlphaComponent(0.5)
]
UIBarButtonItem.barAppearanceWhenContained(in: UINavigationBar.self)
.setTitleTextAttributes(attributes, for: UIControlState.disabled)
回答by Unis Barakat
For swift 4.X
对于 swift 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)
basically NSForegroundColorAttributeNamebecame NSAttributedStringKey.foregroundColorand states went from being caps to lower case .Disabledbecame .disabled, etc..
基本上NSForegroundColorAttributeName变成了NSAttributedStringKey.foregroundColor，状态从大写变成了小写.Disabled变成了.disabled等等。
回答by Kevin Singh
SWIFT 5
快速 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)
回答by MattyG
myBarButtonItem.setBackgroundImage(myIconImage, forState: .Normal, barMetrics: .Default)
myBarButtonItem.setBackgroundImage(myIconImage, forState: .Disabled, barMetrics: .Default)
myBarButtonItem.enabled = false
