iOS Abstract Out the UIView type from winit (#609)

* remove opengl code from winit

* iOS: restrict EventsLoop to be created on the main thread
iOS: Window can only be made once, make Drop on Window thread safe
iOS: make DelegateState owned by Window, cleanup
iOS: fixes from merge (class! macro)

* update the changelog

* Fixed nitpicks

CHANGELOG.md

@@ -3,6 +3,8 @@
 - On MacOS, the key state for modifiers key events is now properly set.
 - On iOS, the view is now set correctly. This makes it possible to render things (instead of being stuck on a black screen), and touch events work again.
 - Added NetBSD support.
+- **Breaking:** On iOS, `UIView` is now the default root view. `WindowBuilderExt::with_root_view_class` can be used to set the root view objective-c class to `GLKView` (OpenGLES) or `MTKView` (Metal/MoltenVK).
+- On iOS, the `UIApplication` is not started until `Window::new` is called.
 
 # Version 0.16.2 (2018-07-07)
 

src/os/ios.rs

@@ -2,7 +2,7 @@
 
 use std::os::raw::c_void;
 
-use {MonitorId, Window};
+use {MonitorId, Window, WindowBuilder};
 
 /// Additional methods on `Window` that are specific to iOS.
 pub trait WindowExt {
@@ -29,6 +29,22 @@ impl WindowExt for Window {
     }
 }
 
+/// Additional methods on `WindowBuilder` that are specific to iOS.
+pub trait WindowBuilderExt {
+    /// Sets the root view class used by the `Window`, otherwise a barebones `UIView` is provided.
+    ///
+    /// The class will be initialized by calling `[root_view initWithFrame:CGRect]`
+    fn with_root_view_class(self, root_view_class: *const c_void) -> WindowBuilder;
+}
+
+impl WindowBuilderExt for WindowBuilder {
+    #[inline]
+    fn with_root_view_class(mut self, root_view_class: *const c_void) -> WindowBuilder {
+        self.platform_specific.root_view_class = unsafe { &*(root_view_class as *const _) };
+        self
+    }
+}
+
 /// Additional methods on `MonitorId` that are specific to iOS.
 pub trait MonitorIdExt {
     /// Returns a pointer to the `UIScreen` that is used by this monitor.

src/platform/ios/ffi.rs

@@ -1,7 +1,6 @@
 #![allow(non_camel_case_types, non_snake_case, non_upper_case_globals)]
 
 use std::ffi::CString;
-use std::mem;
 use std::os::raw::*;
 
 use objc::runtime::Object;
@@ -15,19 +14,11 @@ pub type Boolean = u32;
 
 pub const kCFRunLoopRunHandledSource: i32 = 4;
 
-pub const UIViewAutoresizingFlexibleWidth: NSUInteger = 1 << 1;
-pub const UIViewAutoresizingFlexibleHeight: NSUInteger = 1 << 4;
-
 #[cfg(target_pointer_width = "32")]
 pub type CGFloat = f32;
 #[cfg(target_pointer_width = "64")]
 pub type CGFloat = f64;
 
-#[cfg(target_pointer_width = "32")]
-pub type NSUInteger = u32;
-#[cfg(target_pointer_width = "64")]
-pub type NSUInteger = u64;
-
 #[repr(C)]
 #[derive(Debug, Clone)]
 pub struct CGPoint {
@@ -76,6 +67,8 @@ extern {
     pub fn longjmp(env: *mut c_void, val: c_int);
 }
 
+pub type JmpBuf = [c_int; 27];
+
 pub trait NSString: Sized {
     unsafe fn alloc(_: Self) -> id {
         msg_send![class!(NSString), alloc]