Renamed NSString to NSStringRust to support Debug View Heirarchy in Xcode (#1631)

* Renamed NSString to NSStringRust to support Debug View Heirarchy

* Updated from comments

* Update CHANGELOG.md

CHANGELOG.md

@@ -1,5 +1,6 @@
 # Unreleased
 
+- On iOS, fixed support for the "Debug View Heirarchy" feature in Xcode.
 - On all platforms, `available_monitors` and `primary_monitor` are now on `EventLoopWindowTarget` rather than `EventLoop` to list monitors event in the event loop.
 - On Unix, X11 and Wayland are now optional features (enabled by default)
 - On X11, fix deadlock when calling `set_fullscreen_inner`.

src/platform_impl/ios/event_loop.rs

@@ -24,7 +24,8 @@ use crate::platform_impl::platform::{
         CFRunLoopActivity, CFRunLoopAddObserver, CFRunLoopAddSource, CFRunLoopGetMain,
         CFRunLoopObserverCreate, CFRunLoopObserverRef, CFRunLoopSourceContext,
         CFRunLoopSourceCreate, CFRunLoopSourceInvalidate, CFRunLoopSourceRef,
-        CFRunLoopSourceSignal, CFRunLoopWakeUp, NSString, UIApplicationMain, UIUserInterfaceIdiom,
+        CFRunLoopSourceSignal, CFRunLoopWakeUp, NSStringRust, UIApplicationMain,
+        UIUserInterfaceIdiom,
     },
     monitor, view, MonitorHandle,
 };
@@ -117,7 +118,7 @@ impl<T: 'static> EventLoop<T> {
                 0,
                 ptr::null(),
                 nil,
-                NSString::alloc(nil).init_str("AppDelegate"),
+                NSStringRust::alloc(nil).init_str("AppDelegate"),
             );
             unreachable!()
         }

src/platform_impl/ios/ffi.rs

@@ -359,7 +359,10 @@ pub struct CFRunLoopSourceContext {
     pub perform: Option<extern "C" fn(*mut c_void)>,
 }
 
-pub trait NSString: Sized {
+// This is named NSStringRust rather than NSString because the "Debug View Heirarchy" feature of
+// Xcode requires a non-ambiguous reference to NSString for unclear reasons. This makes Xcode happy
+// so please test if you change the name back to NSString.
+pub trait NSStringRust: Sized {
     unsafe fn alloc(_: Self) -> id {
         msg_send![class!(NSString), alloc]
     }
@@ -370,7 +373,7 @@ pub trait NSString: Sized {
     unsafe fn UTF8String(self) -> *const c_char;
 }
 
-impl NSString for id {
+impl NSStringRust for id {
     unsafe fn initWithUTF8String_(self, c_string: *const c_char) -> id {
         msg_send![self, initWithUTF8String: c_string as id]
     }