On iOS, add configuration for status bar style

Co-authored-by: Mads Marquart <mads@marquart.dk>

CHANGELOG.md

@@ -30,6 +30,7 @@ And please only add new entries to the top of this list, right below the `# Unre
 - On Android, fix `DeviceId` to contain device id's.
 - Add `Window::set_blur` to request a blur behind the window; implemented on Wayland for now.
 - On Web, fix `ControlFlow::WaitUntil` to never wake up **before** the given time.
+- On iOS, add ability to change the status bar style.
 - Add `Window::show_window_menu` to request a titlebar/system menu; implemented on Wayland/Windows for now.
 - On iOS, send events `WindowEvent::Occluded(false)`, `WindowEvent::Occluded(true)` when application enters/leaves foreground.
 - **Breaking** add `Event::MemoryWarning`; implemented on iOS/Android.

FEATURES.md

@@ -150,7 +150,7 @@ If your PR makes notable changes to Winit's features, please update this section
 * Setting the `UIView` hidpi factor
 * Valid orientations
 * Home indicator visibility
-* Status bar visibility
+* Status bar visibility and style
 * Deferrring system gestures
 * Getting the device idiom
 * Getting the preferred video mode

src/platform/ios.rs

@@ -69,11 +69,25 @@ pub trait WindowExtIOS {
     ///
     /// The default is to prefer showing the status bar.
     ///
-    /// This changes the value returned by
+    /// This sets the value of the
-    /// [`-[UIViewController prefersStatusBarHidden]`](https://developer.apple.com/documentation/uikit/uiviewcontroller/1621440-prefersstatusbarhidden?language=objc),
+    /// [`prefersStatusBarHidden`](https://developer.apple.com/documentation/uikit/uiviewcontroller/1621440-prefersstatusbarhidden?language=objc)
-    /// and then calls
+    /// property.
-    /// [`-[UIViewController setNeedsStatusBarAppearanceUpdate]`](https://developer.apple.com/documentation/uikit/uiviewcontroller/1621354-setneedsstatusbarappearanceupdat?language=objc).
+    ///
+    /// [`setNeedsStatusBarAppearanceUpdate()`](https://developer.apple.com/documentation/uikit/uiviewcontroller/1621354-setneedsstatusbarappearanceupdat?language=objc)
+    /// is also called for you.
     fn set_prefers_status_bar_hidden(&self, hidden: bool);
+
+    /// Sets the preferred status bar style for the [`Window`].
+    ///
+    /// The default is system-defined.
+    ///
+    /// This sets the value of the
+    /// [`preferredStatusBarStyle`](https://developer.apple.com/documentation/uikit/uiviewcontroller/1621416-preferredstatusbarstyle?language=objc)
+    /// property.
+    ///
+    /// [`setNeedsStatusBarAppearanceUpdate()`](https://developer.apple.com/documentation/uikit/uiviewcontroller/1621354-setneedsstatusbarappearanceupdat?language=objc)
+    /// is also called for you.
+    fn set_preferred_status_bar_style(&self, status_bar_style: StatusBarStyle);
 }
 
 impl WindowExtIOS for Window {
@@ -107,6 +121,12 @@ impl WindowExtIOS for Window {
         self.window
             .maybe_queue_on_main(move |w| w.set_prefers_status_bar_hidden(hidden))
     }
+
+    #[inline]
+    fn set_preferred_status_bar_style(&self, status_bar_style: StatusBarStyle) {
+        self.window
+            .maybe_queue_on_main(move |w| w.set_preferred_status_bar_style(status_bar_style))
+    }
 }
 
 /// Additional methods on [`WindowBuilder`] that are specific to iOS.
@@ -154,6 +174,14 @@ pub trait WindowBuilderExtIOS {
     /// This sets the initial value returned by
     /// [`-[UIViewController prefersStatusBarHidden]`](https://developer.apple.com/documentation/uikit/uiviewcontroller/1621440-prefersstatusbarhidden?language=objc).
     fn with_prefers_status_bar_hidden(self, hidden: bool) -> Self;
+
+    /// Sets the style of the [`Window`]'s status bar.
+    ///
+    /// The default is system-defined.
+    ///
+    /// This sets the initial value returned by
+    /// [`-[UIViewController preferredStatusBarStyle]`](https://developer.apple.com/documentation/uikit/uiviewcontroller/1621416-preferredstatusbarstyle?language=objc),
+    fn with_preferred_status_bar_style(self, status_bar_style: StatusBarStyle) -> Self;
 }
 
 impl WindowBuilderExtIOS for WindowBuilder {
@@ -187,6 +215,12 @@ impl WindowBuilderExtIOS for WindowBuilder {
         self.platform_specific.prefers_status_bar_hidden = hidden;
         self
     }
+
+    #[inline]
+    fn with_preferred_status_bar_style(mut self, status_bar_style: StatusBarStyle) -> Self {
+        self.platform_specific.preferred_status_bar_style = status_bar_style;
+        self
+    }
 }
 
 /// Additional methods on [`MonitorHandle`] that are specific to iOS.
@@ -264,3 +298,11 @@ bitflags! {
             | ScreenEdge::BOTTOM.bits() | ScreenEdge::RIGHT.bits();
     }
 }
+
+#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
+pub enum StatusBarStyle {
+    #[default]
+    Default,
+    LightContent,
+    DarkContent,
+}

src/platform_impl/ios/uikit/mod.rs

@@ -12,6 +12,7 @@ mod event;
 mod responder;
 mod screen;
 mod screen_mode;
+mod status_bar_style;
 mod touch;
 mod trait_collection;
 mod view;
@@ -25,6 +26,7 @@ pub(crate) use self::event::UIEvent;
 pub(crate) use self::responder::UIResponder;
 pub(crate) use self::screen::{UIScreen, UIScreenOverscanCompensation};
 pub(crate) use self::screen_mode::UIScreenMode;
+pub(crate) use self::status_bar_style::UIStatusBarStyle;
 pub(crate) use self::touch::{UITouch, UITouchPhase, UITouchType};
 pub(crate) use self::trait_collection::{UIForceTouchCapability, UITraitCollection};
 #[allow(unused_imports)]

src/platform_impl/ios/uikit/status_bar_style.rs

@@ -0,0 +1,27 @@
+use crate::platform::ios::StatusBarStyle;
+use icrate::Foundation::NSInteger;
+use objc2::encode::{Encode, Encoding};
+
+#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
+#[allow(dead_code)]
+#[repr(isize)]
+pub enum UIStatusBarStyle {
+    #[default]
+    Default = 0,
+    LightContent = 1,
+    DarkContent = 3,
+}
+
+impl From<StatusBarStyle> for UIStatusBarStyle {
+    fn from(value: StatusBarStyle) -> Self {
+        match value {
+            StatusBarStyle::Default => Self::Default,
+            StatusBarStyle::LightContent => Self::LightContent,
+            StatusBarStyle::DarkContent => Self::DarkContent,
+        }
+    }
+}
+
+unsafe impl Encode for UIStatusBarStyle {
+    const ENCODING: Encoding = NSInteger::ENCODING;
+}

src/platform_impl/ios/view.rs

@@ -11,8 +11,8 @@ use objc2::{declare_class, extern_methods, msg_send, msg_send_id, mutability, Cl
 use super::app_state::{self, EventWrapper};
 use super::uikit::{
     UIApplication, UIDevice, UIEvent, UIForceTouchCapability, UIInterfaceOrientationMask,
-    UIResponder, UITouch, UITouchPhase, UITouchType, UITraitCollection, UIView, UIViewController,
+    UIResponder, UIStatusBarStyle, UITouch, UITouchPhase, UITouchType, UITraitCollection, UIView,
-    UIWindow,
+    UIViewController, UIWindow,
 };
 use super::window::WindowId;
 use crate::{
@@ -267,6 +267,7 @@ impl WinitView {
 
 pub struct ViewControllerState {
     prefers_status_bar_hidden: Cell<bool>,
+    preferred_status_bar_style: Cell<UIStatusBarStyle>,
     prefers_home_indicator_auto_hidden: Cell<bool>,
     supported_orientations: Cell<UIInterfaceOrientationMask>,
     preferred_screen_edges_deferring_system_gestures: Cell<UIRectEdge>,
@@ -297,6 +298,7 @@ declare_class!(
                     &mut this.state,
                     Box::new(ViewControllerState {
                         prefers_status_bar_hidden: Cell::new(false),
+                        preferred_status_bar_style: Cell::new(UIStatusBarStyle::Default),
                         prefers_home_indicator_auto_hidden: Cell::new(false),
                         supported_orientations: Cell::new(UIInterfaceOrientationMask::All),
                         preferred_screen_edges_deferring_system_gestures: Cell::new(
@@ -320,6 +322,11 @@ declare_class!(
             self.state.prefers_status_bar_hidden.get()
         }
 
+        #[method(preferredStatusBarStyle)]
+        fn preferred_status_bar_style(&self) -> UIStatusBarStyle {
+            self.state.preferred_status_bar_style.get()
+        }
+
         #[method(prefersHomeIndicatorAutoHidden)]
         fn prefers_home_indicator_auto_hidden(&self) -> bool {
             self.state.prefers_home_indicator_auto_hidden.get()
@@ -345,6 +352,11 @@ impl WinitViewController {
         self.setNeedsStatusBarAppearanceUpdate();
     }
 
+    pub(crate) fn set_preferred_status_bar_style(&self, val: UIStatusBarStyle) {
+        self.state.preferred_status_bar_style.set(val);
+        self.setNeedsStatusBarAppearanceUpdate();
+    }
+
     pub(crate) fn set_prefers_home_indicator_auto_hidden(&self, val: bool) {
         self.state.prefers_home_indicator_auto_hidden.set(val);
         let os_capabilities = app_state::os_capabilities();
@@ -403,6 +415,8 @@ impl WinitViewController {
 
         this.set_prefers_status_bar_hidden(platform_attributes.prefers_status_bar_hidden);
 
+        this.set_preferred_status_bar_style(platform_attributes.preferred_status_bar_style.into());
+
         this.set_supported_interface_orientations(mtm, platform_attributes.valid_orientations);
 
         this.set_prefers_home_indicator_auto_hidden(

src/platform_impl/ios/window.rs

@@ -15,7 +15,7 @@ use crate::{
     error::{ExternalError, NotSupportedError, OsError as RootOsError},
     event::{Event, WindowEvent},
     icon::Icon,
-    platform::ios::{ScreenEdge, ValidOrientations},
+    platform::ios::{ScreenEdge, StatusBarStyle, ValidOrientations},
     platform_impl::platform::{
         app_state, monitor, EventLoopWindowTarget, Fullscreen, MonitorHandle,
     },
@@ -551,6 +551,11 @@ impl Inner {
     pub fn set_prefers_status_bar_hidden(&self, hidden: bool) {
         self.view_controller.set_prefers_status_bar_hidden(hidden);
     }
+
+    pub fn set_preferred_status_bar_style(&self, status_bar_style: StatusBarStyle) {
+        self.view_controller
+            .set_preferred_status_bar_style(status_bar_style.into());
+    }
 }
 
 impl Inner {
@@ -659,5 +664,6 @@ pub struct PlatformSpecificWindowBuilderAttributes {
     pub valid_orientations: ValidOrientations,
     pub prefers_home_indicator_hidden: bool,
     pub prefers_status_bar_hidden: bool,
+    pub preferred_status_bar_style: StatusBarStyle,
     pub preferred_screen_edges_deferring_system_gestures: ScreenEdge,
 }