Fix for Game Center leaderboard screens not always responding to touc…

…h input in iOS apps that don't use SDL_iPhoneSetAnimationCallback
libsdl-org · Jul 23, 2012 · 08817dd · 08817dd
1 parent 5280cdd
commit 08817dd
Showing 1 changed file with 12 additions and 2 deletions.
diff --git a/src/video/uikit/SDL_uikitevents.m b/src/video/uikit/SDL_uikitevents.m
@@ -57,14 +57,24 @@ So what we do is that in the UIApplicationDelegate class (SDLUIApplicationDelega
      */
     if (setjmp(*jump_env()) == 0) {
         /* if we're setting the jump, rather than jumping back */
+
+		/* Let the run loop run for a short amount of time: long enough for
+		   touch events to get processed (which is important to get certain
+		   elements of Game Center's GKLeaderboardViewController to respond
+		   to touch input), but not long enough to introduce a significant
+		   delay in the rest of the app.
+		*/
+		const CFTimeInterval seconds = 0.000002;
+
+		/* Pump most event types. */
         SInt32 result;
         do {
-            result = CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0, TRUE);
+            result = CFRunLoopRunInMode(kCFRunLoopDefaultMode, seconds, TRUE);
         } while (result == kCFRunLoopRunHandledSource);
 
 		/* Make sure UIScrollView objects scroll properly. */
 		do {
-			result = CFRunLoopRunInMode((CFStringRef)UITrackingRunLoopMode, 0, TRUE);
+			result = CFRunLoopRunInMode((CFStringRef)UITrackingRunLoopMode, seconds, TRUE);
 		} while(result == kCFRunLoopRunHandledSource);
     }
 }