[BottomNavigation] Add check for existence of UIPointerInteraction to…

… prevent iOS 13 beta crashes. PiperOrigin-RevId: 318481794
material-components · Jun 26, 2020 · 7e25289 · 7e25289
1 parent 87422cf
commit 7e25289
Showing 1 changed file with 7 additions and 3 deletions.
diff --git a/components/BottomNavigation/src/MDCBottomNavigationBar.m b/components/BottomNavigation/src/MDCBottomNavigationBar.m
@@ -641,9 +641,13 @@ - (void)setItems:(NSArray<UITabBarItem *> *)items {
 
 #ifdef __IPHONE_13_4
     if (@available(iOS 13.4, *)) {
-      UIPointerInteraction *pointerInteraction =
-          [[UIPointerInteraction alloc] initWithDelegate:self];
-      [itemView addInteraction:pointerInteraction];
+      // Because some iOS 13 betas did not have the UIPointerInteraction class, we need to verify
+      // that it exists before attempting to use it.
+      if (NSClassFromString(@"UIPointerInteraction")) {
+        UIPointerInteraction *pointerInteraction =
+            [[UIPointerInteraction alloc] initWithDelegate:self];
+        [itemView addInteraction:pointerInteraction];
+      }
     }
 #endif