set the UIViewController's view to the one that was just created (#595)

* set the UIViewController's view to the one that was just created

* capture the return value in a Unit to avoid SIGILL/SIGSEGV's.
change whitespace to be more idiomatic of Obj-C

* CHANGELOG entry

CHANGELOG.md

@@ -1,5 +1,7 @@
 # Unreleased
 
+- 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.
+
 # Version 0.16.2 (2018-07-07)
 
 - On Windows, non-resizable windows now have the maximization button disabled. This is consistent with behavior on macOS and popular X11 WMs.

src/platform/ios/mod.rs

@@ -489,6 +489,8 @@ fn create_delegate_class() {
             let view: id = msg_send![view_class, alloc];
             let view: id = msg_send![view, initForGl:&bounds];
 
+            let _: () = msg_send![view_controller, setView:view];
+
             let _: () = msg_send![window, setRootViewController:view_controller];
             let _: () = msg_send![window, makeKeyAndVisible];