Fixed presentation of PFAlertView when rootViewController has presentedViewController.

Author: nlutsenko

Parse/Internal/PFAlertView.m

@@ -52,6 +52,9 @@ + (void)showAlertWithTitle:(NSString *)title
 
         UIWindow *keyWindow = [UIApplication sharedApplication].keyWindow;
         UIViewController *viewController = keyWindow.rootViewController;
+        while (viewController.presentedViewController) {
+            viewController = viewController.presentedViewController;
+        }
 
         [viewController presentViewController:alertController animated:YES completion:nil];
     } else {