Fix iOS crash: don't set autoresizing mask (#6535)

CHANGELOG.md

@@ -139,6 +139,10 @@ By @ErichDonGubler in [#6456](https://github.com/gfx-rs/wgpu/pull/6456), [#6148]
 
 - Fix surface capabilities being advertised when its query failed. By @wumpf in [#6510](https://github.com/gfx-rs/wgpu/pull/6510)
 
+### Metal
+
+- Fix surface creation crashing on iOS. By @mockersf in [#6535](https://github.com/gfx-rs/wgpu/pull/6535)
+
 
 ## 23.0.0 (2024-10-25)
 

wgpu-hal/src/metal/surface.rs

@@ -1,6 +1,5 @@
 #![allow(clippy::let_unit_value)] // `let () =` being used to constrain result type
 
-use std::ffi::c_uint;
 use std::mem::ManuallyDrop;
 use std::ptr::NonNull;
 use std::sync::Once;
@@ -207,6 +206,8 @@ impl super::Surface {
             let new_layer: *mut Object = msg_send![class!(CAMetalLayer), new];
             let () = msg_send![root_layer, addSublayer: new_layer];
 
+            #[cfg(target_os = "macos")]
+            {
                 // Automatically resize the sublayer's frame to match the
                 // superlayer's bounds.
                 //
@@ -222,8 +223,9 @@ impl super::Surface {
                 // (as we may do, see above).
                 let width_sizable = 1 << 1; // kCALayerWidthSizable
                 let height_sizable = 1 << 4; // kCALayerHeightSizable
-            let mask: c_uint = width_sizable | height_sizable;
+                let mask: std::ffi::c_uint = width_sizable | height_sizable;
                 let () = msg_send![new_layer, setAutoresizingMask: mask];
+            }
 
             // Specify the relative size that the auto resizing mask above
             // will keep (i.e. tell it to fill out its superlayer).