Fixes for vulkanExample: frame timing now equals diff between frames for Win & macOS portability, support vsync off rendering on macOS, support swapchain image count change on resize, handle macOS fullscreen; Fixes for xcode example: use PanGestureRecognizer on iOS, add macOS cursor tracking, cleanup Vulkan on shutdown

xcode/ios/AppDelegate.m

@@ -6,6 +6,7 @@
  */
 
 #import "AppDelegate.h"
+#import "DemoViewController.h"
 
 @interface AppDelegate ()
 
@@ -39,6 +40,7 @@
 
 - (void)applicationWillTerminate:(UIApplication *)application {
 	// Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
+	[(DemoViewController *)_viewController shutdownExample];
 }
 
 @end