Get scale factor for view from trait collection instead of screen

square · Apr 16, 2024 · 1f443b9 · 1f443b9
1 parent ce04c4d
commit 1f443b9
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/Paralayout/PixelRounding.swift b/Paralayout/PixelRounding.swift
@@ -34,7 +34,17 @@ extension UIScreen: ScaleFactorProviding {
 extension UIView: ScaleFactorProviding {
 
     public var pixelsPerPoint: CGFloat {
+        let scaleFromTraits = traitCollection.displayScale
+
+        // The trait collection is the authority for display scale, but sometimes the trait collection does not have a
+        // value for the scale, in which case it will return 0, breaking all the things.
+        if scaleFromTraits > 0 {
+            return scaleFromTraits
+        }
+
+        #if os(iOS)
         return (window?.screen ?? UIScreen.main).pixelsPerPoint
+        #endif
     }
 
 }