Update objc2 version (#2936)

* Upgrade to objc2 v0.4.0 and icrate v0.0.3

* Fix `touchBar` method

* Use ClassType::alloc

* Use #[method_id(...)] functionality in declare_class!

src/platform_impl/ios/app_state.rs

@@ -15,8 +15,8 @@ use core_foundation::runloop::{
     kCFRunLoopCommonModes, CFRunLoopAddTimer, CFRunLoopGetMain, CFRunLoopRef, CFRunLoopTimerCreate,
     CFRunLoopTimerInvalidate, CFRunLoopTimerRef, CFRunLoopTimerSetNextFireDate,
 };
-use objc2::foundation::{CGRect, CGSize, NSInteger, NSProcessInfo};
-use objc2::rc::{Id, Shared};
+use icrate::Foundation::{CGRect, CGSize, NSInteger, NSProcessInfo};
+use objc2::rc::Id;
 use objc2::runtime::Object;
 use objc2::{msg_send, sel};
 use once_cell::sync::Lazy;
@@ -68,25 +68,25 @@ impl Event<'static, Never> {
 #[must_use = "dropping `AppStateImpl` without inspecting it is probably a bug"]
 enum AppStateImpl {
     NotLaunched {
-        queued_windows: Vec<Id<WinitUIWindow, Shared>>,
+        queued_windows: Vec<Id<WinitUIWindow>>,
         queued_events: Vec<EventWrapper>,
-        queued_gpu_redraws: HashSet<Id<WinitUIWindow, Shared>>,
+        queued_gpu_redraws: HashSet<Id<WinitUIWindow>>,
     },
     Launching {
-        queued_windows: Vec<Id<WinitUIWindow, Shared>>,
+        queued_windows: Vec<Id<WinitUIWindow>>,
         queued_events: Vec<EventWrapper>,
         queued_event_handler: Box<dyn EventHandler>,
-        queued_gpu_redraws: HashSet<Id<WinitUIWindow, Shared>>,
+        queued_gpu_redraws: HashSet<Id<WinitUIWindow>>,
     },
     ProcessingEvents {
         event_handler: Box<dyn EventHandler>,
-        queued_gpu_redraws: HashSet<Id<WinitUIWindow, Shared>>,
+        queued_gpu_redraws: HashSet<Id<WinitUIWindow>>,
         active_control_flow: ControlFlow,
     },
     // special state to deal with reentrancy and prevent mutable aliasing.
     InUserCallback {
         queued_events: Vec<EventWrapper>,
-        queued_gpu_redraws: HashSet<Id<WinitUIWindow, Shared>>,
+        queued_gpu_redraws: HashSet<Id<WinitUIWindow>>,
     },
     ProcessingRedraws {
         event_handler: Box<dyn EventHandler>,
@@ -204,9 +204,7 @@ impl AppState {
         });
     }
 
-    fn did_finish_launching_transition(
-        &mut self,
-    ) -> (Vec<Id<WinitUIWindow, Shared>>, Vec<EventWrapper>) {
+    fn did_finish_launching_transition(&mut self) -> (Vec<Id<WinitUIWindow>>, Vec<EventWrapper>) {
         let (windows, events, event_handler, queued_gpu_redraws) = match self.take_state() {
             AppStateImpl::Launching {
                 queued_windows,
@@ -363,7 +361,7 @@ impl AppState {
         }
     }
 
-    fn main_events_cleared_transition(&mut self) -> HashSet<Id<WinitUIWindow, Shared>> {
+    fn main_events_cleared_transition(&mut self) -> HashSet<Id<WinitUIWindow>> {
         let (event_handler, queued_gpu_redraws, active_control_flow) = match self.take_state() {
             AppStateImpl::ProcessingEvents {
                 event_handler,
@@ -451,7 +449,7 @@ impl AppState {
 
 // requires main thread and window is a UIWindow
 // retains window
-pub(crate) unsafe fn set_key_window(window: &Id<WinitUIWindow, Shared>) {
+pub(crate) unsafe fn set_key_window(window: &Id<WinitUIWindow>) {
     let mut this = AppState::get_mut();
     match this.state_mut() {
         &mut AppStateImpl::NotLaunched {
@@ -474,7 +472,7 @@ pub(crate) unsafe fn set_key_window(window: &Id<WinitUIWindow, Shared>) {
 
 // requires main thread and window is a UIWindow
 // retains window
-pub(crate) unsafe fn queue_gl_or_metal_redraw(window: Id<WinitUIWindow, Shared>) {
+pub(crate) unsafe fn queue_gl_or_metal_redraw(window: Id<WinitUIWindow>) {
     let mut this = AppState::get_mut();
     match this.state_mut() {
         &mut AppStateImpl::NotLaunched {
@@ -807,7 +805,7 @@ fn handle_hidpi_proxy(
     mut control_flow: ControlFlow,
     suggested_size: LogicalSize<f64>,
     scale_factor: f64,
-    window: Id<WinitUIWindow, Shared>,
+    window: Id<WinitUIWindow>,
 ) {
     let mut size = suggested_size.to_physical(scale_factor);
     let new_inner_size = &mut size;
@@ -827,7 +825,7 @@ fn handle_hidpi_proxy(
     view.setFrame(new_frame);
 }
 
-fn get_view_and_screen_frame(window: &WinitUIWindow) -> (Id<UIView, Shared>, CGRect) {
+fn get_view_and_screen_frame(window: &WinitUIWindow) -> (Id<UIView>, CGRect) {
     let view_controller = window.rootViewController().unwrap();
     let view = view_controller.view().unwrap();
     let bounds = window.bounds();
@@ -963,7 +961,7 @@ impl NSOperatingSystemVersion {
 pub fn os_capabilities() -> OSCapabilities {
     static OS_CAPABILITIES: Lazy<OSCapabilities> = Lazy::new(|| {
         let version: NSOperatingSystemVersion = unsafe {
-            let process_info = NSProcessInfo::process_info();
+            let process_info = NSProcessInfo::processInfo();
             let atleast_ios_8: bool = msg_send![
                 &process_info,
                 respondsToSelector: sel!(operatingSystemVersion)

src/platform_impl/ios/event_loop.rs

@@ -14,8 +14,8 @@ use core_foundation::runloop::{
     CFRunLoopObserverCreate, CFRunLoopObserverRef, CFRunLoopSourceContext, CFRunLoopSourceCreate,
     CFRunLoopSourceInvalidate, CFRunLoopSourceRef, CFRunLoopSourceSignal, CFRunLoopWakeUp,
 };
-use objc2::foundation::{MainThreadMarker, NSString};
-use objc2::rc::{Id, Shared};
+use icrate::Foundation::{MainThreadMarker, NSString};
+use objc2::rc::Id;
 use objc2::ClassType;
 use raw_window_handle::{RawDisplayHandle, UiKitDisplayHandle};
 
@@ -40,7 +40,7 @@ pub(crate) enum EventWrapper {
 #[derive(Debug, PartialEq)]
 pub(crate) enum EventProxy {
     DpiChangedProxy {
-        window: Id<WinitUIWindow, Shared>,
+        window: Id<WinitUIWindow>,
         suggested_size: LogicalSize<f64>,
         scale_factor: f64,
     },

src/platform_impl/ios/ffi.rs

@@ -2,8 +2,8 @@
 
 use std::convert::TryInto;
 
+use icrate::Foundation::{NSInteger, NSUInteger};
 use objc2::encode::{Encode, Encoding};
-use objc2::foundation::{NSInteger, NSUInteger};
 
 use crate::platform::ios::{Idiom, ScreenEdge};
 

src/platform_impl/ios/mod.rs

@@ -63,7 +63,7 @@
 // window size/position.
 macro_rules! assert_main_thread {
     ($($t:tt)*) => {
-        if !::objc2::foundation::is_main_thread() {
+        if !::icrate::Foundation::is_main_thread() {
             panic!($($t)*);
         }
     };

src/platform_impl/ios/monitor.rs

@@ -6,8 +6,8 @@ use std::{
     ops::{Deref, DerefMut},
 };
 
-use objc2::foundation::{MainThreadMarker, NSInteger};
-use objc2::rc::{Id, Shared};
+use icrate::Foundation::{MainThreadMarker, NSInteger};
+use objc2::rc::Id;
 
 use super::uikit::{UIScreen, UIScreenMode};
 use crate::{
@@ -18,7 +18,7 @@ use crate::{
 
 // TODO(madsmtm): Remove or refactor this
 #[derive(Debug, PartialEq, Eq, Hash, Clone)]
-pub(crate) struct ScreenModeSendSync(pub(crate) Id<UIScreenMode, Shared>);
+pub(crate) struct ScreenModeSendSync(pub(crate) Id<UIScreenMode>);
 
 unsafe impl Send for ScreenModeSendSync {}
 unsafe impl Sync for ScreenModeSendSync {}
@@ -33,7 +33,7 @@ pub struct VideoMode {
 }
 
 impl VideoMode {
-    fn new(uiscreen: Id<UIScreen, Shared>, screen_mode: Id<UIScreenMode, Shared>) -> VideoMode {
+    fn new(uiscreen: Id<UIScreen>, screen_mode: Id<UIScreenMode>) -> VideoMode {
         assert_main_thread!("`VideoMode` can only be created on the main thread on iOS");
         let refresh_rate_millihertz = refresh_rate_millihertz(&uiscreen);
         let size = screen_mode.size();
@@ -65,7 +65,7 @@ impl VideoMode {
 
 #[derive(Clone, PartialEq, Eq, Hash)]
 pub struct Inner {
-    uiscreen: Id<UIScreen, Shared>,
+    uiscreen: Id<UIScreen>,
 }
 
 #[derive(Clone, PartialEq, Eq, Hash)]
@@ -135,7 +135,7 @@ impl fmt::Debug for MonitorHandle {
 }
 
 impl MonitorHandle {
-    pub(crate) fn new(uiscreen: Id<UIScreen, Shared>) -> Self {
+    pub(crate) fn new(uiscreen: Id<UIScreen>) -> Self {
         assert_main_thread!("`MonitorHandle` can only be created on the main thread on iOS");
         Self {
             inner: Inner { uiscreen },
@@ -182,13 +182,8 @@ impl Inner {
             .uiscreen
             .availableModes()
             .into_iter()
-            .map(|mode| {
-                let mode: *const UIScreenMode = mode;
-                let mode = unsafe { Id::retain(mode as *mut UIScreenMode).unwrap() };
-
-                RootVideoMode {
-                    video_mode: VideoMode::new(self.uiscreen.clone(), mode),
-                }
+            .map(|mode| RootVideoMode {
+                video_mode: VideoMode::new(self.uiscreen.clone(), mode),
             })
             .collect();
 
@@ -222,7 +217,7 @@ fn refresh_rate_millihertz(uiscreen: &UIScreen) -> u32 {
 
 // MonitorHandleExtIOS
 impl Inner {
-    pub(crate) fn ui_screen(&self) -> &Id<UIScreen, Shared> {
+    pub(crate) fn ui_screen(&self) -> &Id<UIScreen> {
         &self.uiscreen
     }
 
@@ -237,10 +232,6 @@ impl Inner {
 pub fn uiscreens(mtm: MainThreadMarker) -> VecDeque<MonitorHandle> {
     UIScreen::screens(mtm)
         .into_iter()
-        .map(|screen| {
-            let screen: *const UIScreen = screen;
-            let screen = unsafe { Id::retain(screen as *mut UIScreen).unwrap() };
-            MonitorHandle::new(screen)
-        })
+        .map(MonitorHandle::new)
         .collect()
 }

src/platform_impl/ios/uikit/application.rs

@@ -1,6 +1,6 @@
-use objc2::foundation::{CGRect, MainThreadMarker, NSArray, NSObject};
-use objc2::rc::{Id, Shared};
-use objc2::{extern_class, extern_methods, msg_send_id, ClassType};
+use icrate::Foundation::{CGRect, MainThreadMarker, NSArray, NSObject};
+use objc2::rc::Id;
+use objc2::{extern_class, extern_methods, msg_send_id, mutability, ClassType};
 
 use super::{UIResponder, UIWindow};
 
@@ -11,20 +11,21 @@ extern_class!(
     unsafe impl ClassType for UIApplication {
         #[inherits(NSObject)]
         type Super = UIResponder;
+        type Mutability = mutability::InteriorMutable;
     }
 );
 
 extern_methods!(
     unsafe impl UIApplication {
-        pub fn shared(_mtm: MainThreadMarker) -> Option<Id<Self, Shared>> {
+        pub fn shared(_mtm: MainThreadMarker) -> Option<Id<Self>> {
             unsafe { msg_send_id![Self::class(), sharedApplication] }
         }
 
-        pub fn windows(&self) -> Id<NSArray<UIWindow, Shared>, Shared> {
+        pub fn windows(&self) -> Id<NSArray<UIWindow>> {
             unsafe { msg_send_id![self, windows] }
         }
 
-        #[sel(statusBarFrame)]
+        #[method(statusBarFrame)]
         pub fn statusBarFrame(&self) -> CGRect;
     }
 );

src/platform_impl/ios/uikit/coordinate_space.rs

@@ -1,5 +1,5 @@
-use objc2::foundation::NSObject;
-use objc2::{extern_class, ClassType};
+use icrate::Foundation::NSObject;
+use objc2::{extern_class, mutability, ClassType};
 
 extern_class!(
     #[derive(Debug, PartialEq, Eq, Hash)]
@@ -7,5 +7,6 @@ extern_class!(
 
     unsafe impl ClassType for UICoordinateSpace {
         type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
     }
 );

src/platform_impl/ios/uikit/device.rs

@@ -1,6 +1,6 @@
-use objc2::foundation::{MainThreadMarker, NSObject};
-use objc2::rc::{Id, Shared};
-use objc2::{extern_class, extern_methods, msg_send_id, ClassType};
+use icrate::Foundation::{MainThreadMarker, NSObject};
+use objc2::rc::Id;
+use objc2::{extern_class, extern_methods, msg_send_id, mutability, ClassType};
 
 use super::super::ffi::UIUserInterfaceIdiom;
 
@@ -10,16 +10,17 @@ extern_class!(
 
     unsafe impl ClassType for UIDevice {
         type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
     }
 );
 
 extern_methods!(
     unsafe impl UIDevice {
-        pub fn current(_mtm: MainThreadMarker) -> Id<Self, Shared> {
+        pub fn current(_mtm: MainThreadMarker) -> Id<Self> {
             unsafe { msg_send_id![Self::class(), currentDevice] }
         }
 
-        #[sel(userInterfaceIdiom)]
+        #[method(userInterfaceIdiom)]
         pub fn userInterfaceIdiom(&self) -> UIUserInterfaceIdiom;
     }
 );

src/platform_impl/ios/uikit/event.rs

@@ -1,5 +1,5 @@
-use objc2::foundation::NSObject;
-use objc2::{extern_class, ClassType};
+use icrate::Foundation::NSObject;
+use objc2::{extern_class, mutability, ClassType};
 
 extern_class!(
     #[derive(Debug, PartialEq, Eq, Hash)]
@@ -7,5 +7,6 @@ extern_class!(
 
     unsafe impl ClassType for UIEvent {
         type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
     }
 );

src/platform_impl/ios/uikit/mod.rs

@@ -4,7 +4,7 @@
 
 use std::os::raw::{c_char, c_int};
 
-use objc2::foundation::NSString;
+use icrate::Foundation::NSString;
 
 mod application;
 mod coordinate_space;

src/platform_impl/ios/uikit/responder.rs

@@ -1,5 +1,5 @@
-use objc2::foundation::NSObject;
-use objc2::{extern_class, ClassType};
+use icrate::Foundation::NSObject;
+use objc2::{extern_class, mutability, ClassType};
 
 extern_class!(
     #[derive(Debug, PartialEq, Eq, Hash)]
@@ -7,5 +7,6 @@ extern_class!(
 
     unsafe impl ClassType for UIResponder {
         type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
     }
 );

src/platform_impl/ios/uikit/screen.rs

@@ -1,7 +1,7 @@
+use icrate::Foundation::{CGFloat, CGRect, MainThreadMarker, NSArray, NSInteger, NSObject};
 use objc2::encode::{Encode, Encoding};
-use objc2::foundation::{CGFloat, CGRect, MainThreadMarker, NSArray, NSInteger, NSObject};
-use objc2::rc::{Id, Shared};
-use objc2::{extern_class, extern_methods, msg_send_id, ClassType};
+use objc2::rc::Id;
+use objc2::{extern_class, extern_methods, msg_send_id, mutability, ClassType};
 
 use super::{UICoordinateSpace, UIScreenMode};
 
@@ -11,53 +11,54 @@ extern_class!(
 
     unsafe impl ClassType for UIScreen {
         type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
     }
 );
 
 extern_methods!(
     unsafe impl UIScreen {
-        pub fn main(_mtm: MainThreadMarker) -> Id<Self, Shared> {
+        pub fn main(_mtm: MainThreadMarker) -> Id<Self> {
             unsafe { msg_send_id![Self::class(), mainScreen] }
         }
 
-        pub fn screens(_mtm: MainThreadMarker) -> Id<NSArray<Self, Shared>, Shared> {
+        pub fn screens(_mtm: MainThreadMarker) -> Id<NSArray<Self>> {
             unsafe { msg_send_id![Self::class(), screens] }
         }
 
-        #[sel(bounds)]
+        #[method(bounds)]
         pub fn bounds(&self) -> CGRect;
 
-        #[sel(scale)]
+        #[method(scale)]
         pub fn scale(&self) -> CGFloat;
 
-        #[sel(nativeBounds)]
+        #[method(nativeBounds)]
         pub fn nativeBounds(&self) -> CGRect;
 
-        #[sel(nativeScale)]
+        #[method(nativeScale)]
         pub fn nativeScale(&self) -> CGFloat;
 
-        #[sel(maximumFramesPerSecond)]
+        #[method(maximumFramesPerSecond)]
         pub fn maximumFramesPerSecond(&self) -> NSInteger;
 
-        pub fn mirroredScreen(&self) -> Id<Self, Shared> {
+        pub fn mirroredScreen(&self) -> Id<Self> {
             unsafe { msg_send_id![Self::class(), mirroredScreen] }
         }
 
-        pub fn preferredMode(&self) -> Option<Id<UIScreenMode, Shared>> {
+        pub fn preferredMode(&self) -> Option<Id<UIScreenMode>> {
             unsafe { msg_send_id![self, preferredMode] }
         }
 
-        #[sel(setCurrentMode:)]
+        #[method(setCurrentMode:)]
         pub fn setCurrentMode(&self, mode: Option<&UIScreenMode>);
 
-        pub fn availableModes(&self) -> Id<NSArray<UIScreenMode, Shared>, Shared> {
+        pub fn availableModes(&self) -> Id<NSArray<UIScreenMode>> {
             unsafe { msg_send_id![self, availableModes] }
         }
 
-        #[sel(setOverscanCompensation:)]
+        #[method(setOverscanCompensation:)]
         pub fn setOverscanCompensation(&self, overscanCompensation: UIScreenOverscanCompensation);
 
-        pub fn coordinateSpace(&self) -> Id<UICoordinateSpace, Shared> {
+        pub fn coordinateSpace(&self) -> Id<UICoordinateSpace> {
             unsafe { msg_send_id![self, coordinateSpace] }
         }
     }

src/platform_impl/ios/uikit/screen_mode.rs

@@ -1,5 +1,5 @@
-use objc2::foundation::{CGSize, NSObject};
-use objc2::{extern_class, extern_methods, ClassType};
+use icrate::Foundation::{CGSize, NSObject};
+use objc2::{extern_class, extern_methods, mutability, ClassType};
 
 extern_class!(
     #[derive(Debug, PartialEq, Eq, Hash)]
@@ -7,12 +7,13 @@ extern_class!(
 
     unsafe impl ClassType for UIScreenMode {
         type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
     }
 );
 
 extern_methods!(
     unsafe impl UIScreenMode {
-        #[sel(size)]
+        #[method(size)]
         pub fn size(&self) -> CGSize;
     }
 );

src/platform_impl/ios/uikit/touch.rs

@@ -1,6 +1,6 @@
+use icrate::Foundation::{CGFloat, CGPoint, NSInteger, NSObject};
 use objc2::encode::{Encode, Encoding};
-use objc2::foundation::{CGFloat, CGPoint, NSInteger, NSObject};
-use objc2::{extern_class, extern_methods, ClassType};
+use objc2::{extern_class, extern_methods, mutability, ClassType};
 
 use super::UIView;
 
@@ -10,27 +10,28 @@ extern_class!(
 
     unsafe impl ClassType for UITouch {
         type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
     }
 );
 
 extern_methods!(
     unsafe impl UITouch {
-        #[sel(locationInView:)]
+        #[method(locationInView:)]
         pub fn locationInView(&self, view: Option<&UIView>) -> CGPoint;
 
-        #[sel(type)]
+        #[method(type)]
         pub fn type_(&self) -> UITouchType;
 
-        #[sel(force)]
+        #[method(force)]
         pub fn force(&self) -> CGFloat;
 
-        #[sel(maximumPossibleForce)]
+        #[method(maximumPossibleForce)]
         pub fn maximumPossibleForce(&self) -> CGFloat;
 
-        #[sel(altitudeAngle)]
+        #[method(altitudeAngle)]
         pub fn altitudeAngle(&self) -> CGFloat;
 
-        #[sel(phase)]
+        #[method(phase)]
         pub fn phase(&self) -> UITouchPhase;
     }
 );

src/platform_impl/ios/uikit/trait_collection.rs

@@ -1,6 +1,6 @@
+use icrate::Foundation::{NSInteger, NSObject};
 use objc2::encode::{Encode, Encoding};
-use objc2::foundation::{NSInteger, NSObject};
-use objc2::{extern_class, extern_methods, ClassType};
+use objc2::{extern_class, extern_methods, mutability, ClassType};
 
 extern_class!(
     #[derive(Debug, PartialEq, Eq, Hash)]
@@ -8,12 +8,13 @@ extern_class!(
 
     unsafe impl ClassType for UITraitCollection {
         type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
     }
 );
 
 extern_methods!(
     unsafe impl UITraitCollection {
-        #[sel(forceTouchCapability)]
+        #[method(forceTouchCapability)]
         pub fn forceTouchCapability(&self) -> UIForceTouchCapability;
     }
 );

src/platform_impl/ios/uikit/view.rs

@@ -1,7 +1,7 @@
+use icrate::Foundation::{CGFloat, CGRect, NSObject};
 use objc2::encode::{Encode, Encoding};
-use objc2::foundation::{CGFloat, CGRect, NSObject};
-use objc2::rc::{Id, Shared};
-use objc2::{extern_class, extern_methods, msg_send_id, ClassType};
+use objc2::rc::Id;
+use objc2::{extern_class, extern_methods, msg_send_id, mutability, ClassType};
 
 use super::{UICoordinateSpace, UIResponder, UIViewController};
 
@@ -12,57 +12,58 @@ extern_class!(
     unsafe impl ClassType for UIView {
         #[inherits(NSObject)]
         type Super = UIResponder;
+        type Mutability = mutability::InteriorMutable;
     }
 );
 
 extern_methods!(
     unsafe impl UIView {
-        #[sel(bounds)]
+        #[method(bounds)]
         pub fn bounds(&self) -> CGRect;
 
-        #[sel(setBounds:)]
+        #[method(setBounds:)]
         pub fn setBounds(&self, value: CGRect);
 
-        #[sel(frame)]
+        #[method(frame)]
         pub fn frame(&self) -> CGRect;
 
-        #[sel(setFrame:)]
+        #[method(setFrame:)]
         pub fn setFrame(&self, value: CGRect);
 
-        #[sel(contentScaleFactor)]
+        #[method(contentScaleFactor)]
         pub fn contentScaleFactor(&self) -> CGFloat;
 
-        #[sel(setContentScaleFactor:)]
+        #[method(setContentScaleFactor:)]
         pub fn setContentScaleFactor(&self, val: CGFloat);
 
-        #[sel(setMultipleTouchEnabled:)]
+        #[method(setMultipleTouchEnabled:)]
         pub fn setMultipleTouchEnabled(&self, val: bool);
 
-        pub fn rootViewController(&self) -> Option<Id<UIViewController, Shared>> {
+        pub fn rootViewController(&self) -> Option<Id<UIViewController>> {
             unsafe { msg_send_id![self, rootViewController] }
         }
 
-        #[sel(setRootViewController:)]
+        #[method(setRootViewController:)]
         pub fn setRootViewController(&self, rootViewController: Option<&UIViewController>);
 
-        #[sel(convertRect:toCoordinateSpace:)]
+        #[method(convertRect:toCoordinateSpace:)]
         pub fn convertRect_toCoordinateSpace(
             &self,
             rect: CGRect,
             coordinateSpace: &UICoordinateSpace,
         ) -> CGRect;
 
-        #[sel(convertRect:fromCoordinateSpace:)]
+        #[method(convertRect:fromCoordinateSpace:)]
         pub fn convertRect_fromCoordinateSpace(
             &self,
             rect: CGRect,
             coordinateSpace: &UICoordinateSpace,
         ) -> CGRect;
 
-        #[sel(safeAreaInsets)]
+        #[method(safeAreaInsets)]
         pub fn safeAreaInsets(&self) -> UIEdgeInsets;
 
-        #[sel(setNeedsDisplay)]
+        #[method(setNeedsDisplay)]
         pub fn setNeedsDisplay(&self);
     }
 );

src/platform_impl/ios/uikit/view_controller.rs

@@ -1,7 +1,7 @@
+use icrate::Foundation::{NSObject, NSUInteger};
 use objc2::encode::{Encode, Encoding};
-use objc2::foundation::{NSObject, NSUInteger};
-use objc2::rc::{Id, Shared};
-use objc2::{extern_class, extern_methods, msg_send_id, ClassType};
+use objc2::rc::Id;
+use objc2::{extern_class, extern_methods, msg_send_id, mutability, ClassType};
 
 use super::{UIResponder, UIView};
 
@@ -12,28 +12,29 @@ extern_class!(
     unsafe impl ClassType for UIViewController {
         #[inherits(NSObject)]
         type Super = UIResponder;
+        type Mutability = mutability::InteriorMutable;
     }
 );
 
 extern_methods!(
     unsafe impl UIViewController {
-        #[sel(attemptRotationToDeviceOrientation)]
+        #[method(attemptRotationToDeviceOrientation)]
         pub fn attemptRotationToDeviceOrientation();
 
-        #[sel(setNeedsStatusBarAppearanceUpdate)]
+        #[method(setNeedsStatusBarAppearanceUpdate)]
         pub fn setNeedsStatusBarAppearanceUpdate(&self);
 
-        #[sel(setNeedsUpdateOfHomeIndicatorAutoHidden)]
+        #[method(setNeedsUpdateOfHomeIndicatorAutoHidden)]
         pub fn setNeedsUpdateOfHomeIndicatorAutoHidden(&self);
 
-        #[sel(setNeedsUpdateOfScreenEdgesDeferringSystemGestures)]
+        #[method(setNeedsUpdateOfScreenEdgesDeferringSystemGestures)]
         pub fn setNeedsUpdateOfScreenEdgesDeferringSystemGestures(&self);
 
-        pub fn view(&self) -> Option<Id<UIView, Shared>> {
+        pub fn view(&self) -> Option<Id<UIView>> {
             unsafe { msg_send_id![self, view] }
         }
 
-        #[sel(setView:)]
+        #[method(setView:)]
         pub fn setView(&self, view: Option<&UIView>);
     }
 );

src/platform_impl/ios/uikit/window.rs

@@ -1,6 +1,6 @@
-use objc2::foundation::NSObject;
-use objc2::rc::{Id, Shared};
-use objc2::{extern_class, extern_methods, msg_send_id, ClassType};
+use icrate::Foundation::NSObject;
+use objc2::rc::Id;
+use objc2::{extern_class, extern_methods, msg_send_id, mutability, ClassType};
 
 use super::{UIResponder, UIScreen, UIView};
 
@@ -11,25 +11,26 @@ extern_class!(
     unsafe impl ClassType for UIWindow {
         #[inherits(UIResponder, NSObject)]
         type Super = UIView;
+        type Mutability = mutability::InteriorMutable;
     }
 );
 
 extern_methods!(
     unsafe impl UIWindow {
-        pub fn screen(&self) -> Id<UIScreen, Shared> {
+        pub fn screen(&self) -> Id<UIScreen> {
             unsafe { msg_send_id![self, screen] }
         }
 
-        #[sel(setScreen:)]
+        #[method(setScreen:)]
         pub fn setScreen(&self, screen: &UIScreen);
 
-        #[sel(setHidden:)]
+        #[method(setHidden:)]
         pub fn setHidden(&self, flag: bool);
 
-        #[sel(makeKeyAndVisible)]
+        #[method(makeKeyAndVisible)]
         pub fn makeKeyAndVisible(&self);
 
-        #[sel(isKeyWindow)]
+        #[method(isKeyWindow)]
         pub fn isKeyWindow(&self) -> bool;
     }
 );

src/platform_impl/ios/view.rs

@@ -2,11 +2,11 @@
 use std::cell::Cell;
 use std::ptr::NonNull;
 
+use icrate::Foundation::{CGFloat, CGRect, MainThreadMarker, NSObject, NSObjectProtocol, NSSet};
 use objc2::declare::{Ivar, IvarDrop};
-use objc2::foundation::{CGFloat, CGRect, MainThreadMarker, NSObject, NSSet};
-use objc2::rc::{Id, Shared};
+use objc2::rc::Id;
 use objc2::runtime::Class;
-use objc2::{declare_class, extern_methods, msg_send, msg_send_id, ClassType};
+use objc2::{declare_class, extern_methods, msg_send, msg_send_id, mutability, ClassType};
 
 use super::uikit::{
     UIApplication, UIDevice, UIEvent, UIForceTouchCapability, UIInterfaceOrientationMask,
@@ -29,16 +29,17 @@ use crate::{
 };
 
 declare_class!(
-    pub(crate) struct WinitView {}
+    pub(crate) struct WinitView;
 
     unsafe impl ClassType for WinitView {
         #[inherits(UIResponder, NSObject)]
         type Super = UIView;
+        type Mutability = mutability::InteriorMutable;
         const NAME: &'static str = "WinitUIView";
     }
 
     unsafe impl WinitView {
-        #[sel(drawRect:)]
+        #[method(drawRect:)]
         fn draw_rect(&self, rect: CGRect) {
             let window = self.window().unwrap();
             unsafe {
@@ -49,7 +50,7 @@ declare_class!(
             let _: () = unsafe { msg_send![super(self), drawRect: rect] };
         }
 
-        #[sel(layoutSubviews)]
+        #[method(layoutSubviews)]
         fn layout_subviews(&self) {
             let _: () = unsafe { msg_send![super(self), layoutSubviews] };
 
@@ -81,7 +82,7 @@ declare_class!(
             }
         }
 
-        #[sel(setContentScaleFactor:)]
+        #[method(setContentScaleFactor:)]
         fn set_content_scale_factor(&self, untrusted_scale_factor: CGFloat) {
             let _: () =
                 unsafe { msg_send![super(self), setContentScaleFactor: untrusted_scale_factor] };
@@ -131,22 +132,22 @@ declare_class!(
             }
         }
 
-        #[sel(touchesBegan:withEvent:)]
+        #[method(touchesBegan:withEvent:)]
         fn touches_began(&self, touches: &NSSet<UITouch>, _event: Option<&UIEvent>) {
             self.handle_touches(touches)
         }
 
-        #[sel(touchesMoved:withEvent:)]
+        #[method(touchesMoved:withEvent:)]
         fn touches_moved(&self, touches: &NSSet<UITouch>, _event: Option<&UIEvent>) {
             self.handle_touches(touches)
         }
 
-        #[sel(touchesEnded:withEvent:)]
+        #[method(touchesEnded:withEvent:)]
         fn touches_ended(&self, touches: &NSSet<UITouch>, _event: Option<&UIEvent>) {
             self.handle_touches(touches)
         }
 
-        #[sel(touchesCancelled:withEvent:)]
+        #[method(touchesCancelled:withEvent:)]
         fn touches_cancelled(&self, touches: &NSSet<UITouch>, _event: Option<&UIEvent>) {
             self.handle_touches(touches)
         }
@@ -156,16 +157,16 @@ declare_class!(
 extern_methods!(
     #[allow(non_snake_case)]
     unsafe impl WinitView {
-        fn window(&self) -> Option<Id<WinitUIWindow, Shared>> {
+        fn window(&self) -> Option<Id<WinitUIWindow>> {
             unsafe { msg_send_id![self, window] }
         }
 
-        unsafe fn traitCollection(&self) -> Id<UITraitCollection, Shared> {
+        unsafe fn traitCollection(&self) -> Id<UITraitCollection> {
             msg_send_id![self, traitCollection]
         }
 
         // TODO: Allow the user to customize this
-        #[sel(layerClass)]
+        #[method(layerClass)]
         pub(crate) fn layerClass() -> &'static Class;
     }
 );
@@ -176,9 +177,8 @@ impl WinitView {
         _window_attributes: &WindowAttributes,
         platform_attributes: &PlatformSpecificWindowBuilderAttributes,
         frame: CGRect,
-    ) -> Id<Self, Shared> {
-        let this: Id<Self, Shared> =
-            unsafe { msg_send_id![msg_send_id![Self::class(), alloc], initWithFrame: frame] };
+    ) -> Id<Self> {
+        let this: Id<Self> = unsafe { msg_send_id![Self::alloc(), initWithFrame: frame] };
 
         this.setMultipleTouchEnabled(true);
 
@@ -258,7 +258,7 @@ impl WinitView {
     }
 }
 
-struct ViewControllerState {
+pub struct ViewControllerState {
     prefers_status_bar_hidden: Cell<bool>,
     prefers_home_indicator_auto_hidden: Cell<bool>,
     supported_orientations: Cell<UIInterfaceOrientationMask>,
@@ -267,19 +267,22 @@ struct ViewControllerState {
 
 declare_class!(
     pub(crate) struct WinitViewController {
-        state: IvarDrop<Box<ViewControllerState>>,
+        state: IvarDrop<Box<ViewControllerState>, "_state">,
     }
 
+    mod view_controller_ivars;
+
     unsafe impl ClassType for WinitViewController {
         #[inherits(UIResponder, NSObject)]
         type Super = UIViewController;
+        type Mutability = mutability::InteriorMutable;
         const NAME: &'static str = "WinitUIViewController";
     }
 
     unsafe impl WinitViewController {
-        #[sel(init)]
-        fn init(&mut self) -> Option<NonNull<Self>> {
-            let this: Option<&mut Self> = unsafe { msg_send![super(self), init] };
+        #[method(init)]
+        unsafe fn init(this: *mut Self) -> Option<NonNull<Self>> {
+            let this: Option<&mut Self> = msg_send![super(this), init];
             this.map(|this| {
                 // These are set in WinitViewController::new, it's just to set them
                 // to _something_.
@@ -300,27 +303,27 @@ declare_class!(
     }
 
     unsafe impl WinitViewController {
-        #[sel(shouldAutorotate)]
+        #[method(shouldAutorotate)]
         fn should_autorotate(&self) -> bool {
             true
         }
 
-        #[sel(prefersStatusBarHidden)]
+        #[method(prefersStatusBarHidden)]
         fn prefers_status_bar_hidden(&self) -> bool {
             self.state.prefers_status_bar_hidden.get()
         }
 
-        #[sel(prefersHomeIndicatorAutoHidden)]
+        #[method(prefersHomeIndicatorAutoHidden)]
         fn prefers_home_indicator_auto_hidden(&self) -> bool {
             self.state.prefers_home_indicator_auto_hidden.get()
         }
 
-        #[sel(supportedInterfaceOrientations)]
+        #[method(supportedInterfaceOrientations)]
         fn supported_orientations(&self) -> UIInterfaceOrientationMask {
             self.state.supported_orientations.get()
         }
 
-        #[sel(preferredScreenEdgesDeferringSystemGestures)]
+        #[method(preferredScreenEdgesDeferringSystemGestures)]
         fn preferred_screen_edges_deferring_system_gestures(&self) -> UIRectEdge {
             self.state
                 .preferred_screen_edges_deferring_system_gestures
@@ -388,9 +391,8 @@ impl WinitViewController {
         _window_attributes: &WindowAttributes,
         platform_attributes: &PlatformSpecificWindowBuilderAttributes,
         view: &UIView,
-    ) -> Id<Self, Shared> {
-        let this: Id<Self, Shared> =
-            unsafe { msg_send_id![msg_send_id![Self::class(), alloc], init] };
+    ) -> Id<Self> {
+        let this: Id<Self> = unsafe { msg_send_id![Self::alloc(), init] };
 
         this.set_prefers_status_bar_hidden(platform_attributes.prefers_status_bar_hidden);
 
@@ -414,15 +416,17 @@ impl WinitViewController {
 
 declare_class!(
     #[derive(Debug, PartialEq, Eq, Hash)]
-    pub(crate) struct WinitUIWindow {}
+    pub(crate) struct WinitUIWindow;
 
     unsafe impl ClassType for WinitUIWindow {
         #[inherits(UIResponder, NSObject)]
         type Super = UIWindow;
+        type Mutability = mutability::InteriorMutable;
+        const NAME: &'static str = "WinitUIWindow";
     }
 
     unsafe impl WinitUIWindow {
-        #[sel(becomeKeyWindow)]
+        #[method(becomeKeyWindow)]
         fn become_key_window(&self) {
             unsafe {
                 app_state::handle_nonuser_event(EventWrapper::StaticEvent(Event::WindowEvent {
@@ -433,7 +437,7 @@ declare_class!(
             let _: () = unsafe { msg_send![super(self), becomeKeyWindow] };
         }
 
-        #[sel(resignKeyWindow)]
+        #[method(resignKeyWindow)]
         fn resign_key_window(&self) {
             unsafe {
                 app_state::handle_nonuser_event(EventWrapper::StaticEvent(Event::WindowEvent {
@@ -453,9 +457,8 @@ impl WinitUIWindow {
         _platform_attributes: &PlatformSpecificWindowBuilderAttributes,
         frame: CGRect,
         view_controller: &UIViewController,
-    ) -> Id<Self, Shared> {
-        let this: Id<Self, Shared> =
-            unsafe { msg_send_id![msg_send_id![Self::class(), alloc], initWithFrame: frame] };
+    ) -> Id<Self> {
+        let this: Id<Self> = unsafe { msg_send_id![Self::alloc(), initWithFrame: frame] };
 
         this.setRootViewController(Some(view_controller));
 
@@ -482,15 +485,17 @@ impl WinitUIWindow {
 }
 
 declare_class!(
-    pub struct WinitApplicationDelegate {}
+    pub struct WinitApplicationDelegate;
 
     unsafe impl ClassType for WinitApplicationDelegate {
         type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
+        const NAME: &'static str = "WinitApplicationDelegate";
     }
 
     // UIApplicationDelegate protocol
     unsafe impl WinitApplicationDelegate {
-        #[sel(application:didFinishLaunchingWithOptions:)]
+        #[method(application:didFinishLaunchingWithOptions:)]
         fn did_finish_launching(&self, _application: &UIApplication, _: *mut NSObject) -> bool {
             unsafe {
                 app_state::did_finish_launching();
@@ -498,22 +503,23 @@ declare_class!(
             true
         }
 
-        #[sel(applicationDidBecomeActive:)]
+        #[method(applicationDidBecomeActive:)]
         fn did_become_active(&self, _application: &UIApplication) {
             unsafe { app_state::handle_nonuser_event(EventWrapper::StaticEvent(Event::Resumed)) }
         }
 
-        #[sel(applicationWillResignActive:)]
+        #[method(applicationWillResignActive:)]
         fn will_resign_active(&self, _application: &UIApplication) {
             unsafe { app_state::handle_nonuser_event(EventWrapper::StaticEvent(Event::Suspended)) }
         }
 
-        #[sel(applicationWillEnterForeground:)]
+        #[method(applicationWillEnterForeground:)]
         fn will_enter_foreground(&self, _application: &UIApplication) {}
-        #[sel(applicationDidEnterBackground:)]
+
+        #[method(applicationDidEnterBackground:)]
         fn did_enter_background(&self, _application: &UIApplication) {}
 
-        #[sel(applicationWillTerminate:)]
+        #[method(applicationWillTerminate:)]
         fn will_terminate(&self, application: &UIApplication) {
             let mut events = Vec::new();
             for window in application.windows().iter() {

src/platform_impl/ios/window.rs

@@ -6,8 +6,8 @@ use std::{
     ops::{Deref, DerefMut},
 };
 
-use objc2::foundation::{CGFloat, CGPoint, CGRect, CGSize, MainThreadMarker};
-use objc2::rc::{Id, Shared};
+use icrate::Foundation::{CGFloat, CGPoint, CGRect, CGSize, MainThreadMarker};
+use objc2::rc::Id;
 use objc2::runtime::Object;
 use objc2::{class, msg_send};
 use raw_window_handle::{RawDisplayHandle, RawWindowHandle, UiKitDisplayHandle, UiKitWindowHandle};
@@ -32,9 +32,9 @@ use crate::{
 };
 
 pub struct Inner {
-    pub(crate) window: Id<WinitUIWindow, Shared>,
-    pub(crate) view_controller: Id<WinitViewController, Shared>,
-    pub(crate) view: Id<WinitView, Shared>,
+    pub(crate) window: Id<WinitUIWindow>,
+    pub(crate) view_controller: Id<WinitViewController>,
+    pub(crate) view: Id<WinitView>,
     gl_or_metal_backed: bool,
 }