I'm finding it hard to change the status bar style programatically.
I see how to statically set it for each ViewController using a combo of (in ViewController.swift):
override var preferredStatusBarStyle: UIStatusBarStyle {
return UIStatusBarStyle.default
}
and (in info.plist):
View controller-based status bar appearance = YES
...
I'm looking to change it whenever I want!
Found the answer after quite a lot of digging!
Set (in info.plist):
View controller-based status bar appearance = NO
and remove the (in ViewController.swift):
override var preferredStatusBarStyle: UIStatusBarStyle {
return UIStatusBarStyle.default
}
...
Now you can use (in ViewController.swift):
UIApplication.shared.setStatusBarStyle(UIStatusBarStyle.lightContent, animated: true)
And, to initially set the style for each ViewController, use viewDidAppear:
override func viewDidAppear(_ animated: Bool) {
UIApplication.shared.setStatusBarStyle(UIStatusBarStyle.lightContent, animated: false)
}
swift 3
1.Change in info.plist the row View controller-based status bar appearance and set it to NO
2.Change in appDelegate.swift in didFinishLaunchingWithOptions
UIApplication.shared.statusBarStyle = .lightContent
Store the status bar style as a property in your view controller:
var statusBarStyle: UIStatusBarStyle = .default
And then implement preferredStatusBarStyle in the same view controller:
override var preferredStatusBarStyle: UIStatusBarStyle {
return statusBarStyle
}
Then when you change statusBarStyle make sure to also call setNeedsStatusBarAppearanceUpdate. The preferredStatusBarStyle method is automatically called when the view appears/disappears, but if you change the status bar style while your view is visible, you have to tell the view controller the status bar appearance needs updating.
Note you still need to make the changes to the plist, and if your view controller is in a navigation controller, you may need to handle the status bar changes there instead (via a UINavigationController subclass, for example).
UIApplication.shared.setStatusBarStyle(…) was deprecated in iOS 9.0, so don't use that.
Related
I am able to hide the status bar on the launch screen by setting Status bar is initially hidden to YES in Info.plist and then I want to show it on my first view controller with a .lightContent style.
However UIApplication.shared.statusBarStyle = .lightContent is deprecated since iOS 9 (so I don't want to use it) and using the following code give me a black status bar on my first view controller.
override var preferredStatusBarStyle: UIStatusBarStyle {
return .lightContent
}
How can I change the status bar style when my first view controller load?
I am trying to find a global solution like UIApplication.shared.statusBarStyle = .lightContent since I don't really want to set the status bar style for every view controller.
I have tested the solutions with View controller-based status bar appearance set to YES and NO.
The problem you're experiencing is that UINavigationController doesn't defer the choice of status bar to its view controllers.
Instead, for a navigation controller, the status bar style can be set by adjusting the barStyle property of its navigationBar.
If it is set to a black style, then the status bar will be light style:
navigationController?.navigationBar.barStyle = .black
Note, that this will also change the color of the navigationBar, however you can still set the bar's colour to whatever you want using barTintColor:
navigationController?.navigationBar.barTintColor = .purple
If you want to make a global change, so that all instances of UINavigationController use the same status bar style (useful if you've got multiple tabs all of which use a navigation controller), then you can add an extension on UINavigationController and override the preferredStatusBarStyle property:
extension UINavigationController {
open override var preferredStatusBarStyle: UIStatusBarStyle {
return .lightContent
}
}
A final option, is to defer the choice to the view controllers in the navigation controller's stack.
To do that, override the childViewControllerForStatusBarStyle property of your navigation controller extension and have it return the topViewController:
extension UINavigationController {
open override var childViewControllerForStatusBarStyle: UIViewController? {
return topViewController
}
}
In this case, you'll need to override preferredStatusBarStyle in all of your view controllers (not the optimal approach, but it's an option if you need this granular level of control on a per-child-controller basis).
All of these solutions require that your View controller-based status bar appearance key in Info.plist is set to YES.
I try to put my Status Bar in Light Content.
The problem is that I have set View controller-based status bar
appearance to YES .
In my ViewController I put :
override open var preferredStatusBarStyle: UIStatusBarStyle {
return .lightContent
}
I also try to put this in my AppDelegate :
application.statusBarStyle = .lightContent
After thats I still have a Dark (black) Status Bar.
ios 10 and swift 3
Change in info.plist the row View controller-based status bar appearance and set it to NO
Change in appDelegate.swift in didFinishLaunchingWithOptions
UIApplication.shared.statusBarStyle = .lightContent
In perticular viewcontroller use
override var preferredStatusBarStyle: UIStatusBarStyle {
return .lightContent
}
In your ViewController's viewDidLoad method try calling
self.setNeedsStatusBarAppearanceUpdate()
didFinishLaunching Method in AppDelegate Class Single line code.
application.statusBarStyle = .lightContent
Here is Apple Guidelines/Instruction about status bar change. Only Dark & light (while & black) are allowed in status bar.
Here is - How to change status bar style:
If you want to set status bar style, application level then set UIViewControllerBasedStatusBarAppearance to NO in your `.plist' file.
if you wan to set status bar style, at view controller level then follow these steps:
Set the UIViewControllerBasedStatusBarAppearance to YES in the .plist file, if you need to set status bar style at UIViewController level only.
In the viewDidLoad add function - setNeedsStatusBarAppearanceUpdate
override preferredStatusBarStyle in your view controller.
-
override func viewDidLoad() {
super.viewDidLoad()
self.setNeedsStatusBarAppearanceUpdate()
}
override var preferredStatusBarStyle: UIStatusBarStyle {
return .lightContent
}
Set value of .plist according to status bar style setup level.
Since UIApplication.shared.setStatusBarStyle(.default, animated: true) is deprecated from IOS9 is it possible to change status bar style with animation on push? I cannot find any description in docs.
It's now a variable you have to override:
override var preferredStatusBarStyle: UIStatusBarStyle
override var preferredStatusBarUpdateAnimation: UIStatusBarAnimation
Depending on when you update the status bar, you might also have to call setNeedsStatusBarAppearanceUpdate()
If you want to set status bar style, application level then set UIViewControllerBasedStatusBarAppearance to NO in your .plist file.
if you wan to set status bar style, at view controller level then follow these steps:
Set the UIViewControllerBasedStatusBarAppearance to YES in the .plist file, if you need to set status bar style at UIViewController level only.
In the viewDidLoad add function - setNeedsStatusBarAppearanceUpdate
override preferredStatusBarStyle in your view controller.
-
override func viewDidLoad() {
super.viewDidLoad()
self.setNeedsStatusBarAppearanceUpdate()
}
override var preferredStatusBarStyle: UIStatusBarStyle {
return .lightContent
}
Set value of .plist according to status bar style setup level.
To tackle the animation part the way I made it transition smoothly between .lightContent and .default was to use something similar to below each time you change it.
UIView.animate(withDuration: 0.2) {
self.setNeedsStatusBarAppearanceUpdate()
}
Place that in your VC you want the status bar to animate and you'll have a nice smooth animation.
override var preferredStatusBarStyle: UIStatusBarStyle {
return lightStatusBar ? .lightContent : .default
}
Above is a snippet of me changing the content based on a condition I have.
I need a white status bar for my main initial ViewController, but also be able to hide it in another ViewController. I can do one or the other, but not both at the same time. Any suggestions?
I set it to white by setting
View controller-based status bar appearance key to NO in the
Info.plist
override func preferredStatusBarStyle() -> UIStatusBarStyle {
return .LightContent
}
And to hide it (on another ViewController presented modally) I do,
override func prefersStatusBarHidden() -> Bool {
return statusBarHidden
}
however it won't hide unless I remove the key I previously added to the Info.plist, but if I remove the key, then the status bar goes back to black.
EDIT-MY Solution:
The View controller classes were not working in my case because I have the main view controller embedded in a navigation controller, my fix was to override the same methods but for the navigation controller instead of the view controller in question.
extension UINavigationController {
public override func preferredStatusBarStyle() -> UIStatusBarStyle {
return .LightContent
}
}
If you add
View controller-based status bar appearance key to NO in the Info.plist
You should use [UIApplication setStatusBarHidden:withAnimation:] and [UIApplication setStatusBarStyle:animated:] to change to the statusbar's appearance. Your method won't be called
As it is said in apple's document:
UIViewControllerBasedStatusBarAppearance (Boolean - iOS) Specifies whether the status bar appearance is based on the style preferred by the view controller that is currently under the status bar. When this key is not present or its value is set to YES, the view controller determines the status bar style. When the key is set to NO, view controllers (or the app) must each set the status bar style explicitly using the UIApplication object.
UIViewControllerBasedStatusBarAppearance key is the same as View controller-based status bar appearance key.
If you don't add the key,your method should work. try add both methods in these two Viewcontrollers, and add some breakpoint to see they're called or override by mistake.
The code in Swift 3.0 Xcode 8.2 works for me:
override open var preferredStatusBarStyle: UIStatusBarStyle {
return .lightContent
}
override open var prefersStatusBarHidden: Bool {
return true
}
I'm currently developing an app (in Swift 3) on Xcode 8 beta, for iOS 10.
What I want to achieve is to change status bar style within a view controller at run time, for changing the theme from daytime theme to night theme.
I've found out that the method I used to use when I was developing another app in the past was deprecated, as shown here on the API reference.
However, preferredStatusBarStyle won't work here since I would like to change it within a single view controller.
Can anybody think of other ways to perform this?
Thanks in advance
EDIT:
To be clear, what I want to do is to change the style when the view controller is already on screen.
You can create a statusBarStyle variable that when changed updates the status bar appearance. If you only want this to affect one controller, simply reverse the effect when the Controller will or did disappear.
var statusBarStyle: UIStatusBarStyle = .lightContent {
didSet {
setNeedsStatusBarAppearanceUpdate()
}
}
override var preferredStatusBarStyle: UIStatusBarStyle {
return statusBarStyle
}
The above solution will override the previous controller's status bar style before the controller appears. If you want to change the status bar style when the controller appears, try this:
var statusBarStyle: UIStatusBarStyle? {
didSet {
setNeedsStatusBarAppearanceUpdate()
}
}
override var preferredStatusBarStyle: UIStatusBarStyle {
return statusBarStyle ?? super.preferredStatusBarStyle
}
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
statusBarStyle = .lightContent
}
In your info.plist, add the UIViewControllerBasedStatusBarAppearance key with a value of false.
Then, in your viewController when switching to your night theme:
UIApplication.shared.statusBarStyle = .lightContent
To go back to black:
UIApplication.shared.statusBarStyle = .default