if block inside RCTExecuteOnMainQueue

Author: Darsbir

React/Views/RCTModalHostViewManager.m

@@ -75,15 +75,15 @@ - (void)presentModalHostView:(RCTModalHostView *)modalHostView
       modalHostView.onShow(nil);
     }
   };
-  if (_presentationBlock) {
-    _presentationBlock([modalHostView reactViewController], viewController, animated, completionBlock);
-  } else {
-    RCTExecuteOnMainQueue(^{
-            [[modalHostView reactViewController] presentViewController:viewController
-                                                                      animated:animated
-                                                                    completion:completionBlock];
-            });
-  }
+  RCTExecuteOnMainQueue(^{
+    if (self->_presentationBlock) {
+      self->_presentationBlock([modalHostView reactViewController], viewController, animated, completionBlock);
+    } else {
+      [[modalHostView reactViewController] presentViewController:viewController
+                                                        animated:animated
+                                                      completion:completionBlock];
+    }
+  })
 }
 
 - (void)dismissModalHostView:(RCTModalHostView *)modalHostView
@@ -95,13 +95,13 @@ - (void)dismissModalHostView:(RCTModalHostView *)modalHostView
       [[self.bridge moduleForClass:[RCTModalManager class]] modalDismissed:modalHostView.identifier];
     }
   };
-  if (_dismissalBlock) {
-    _dismissalBlock([modalHostView reactViewController], viewController, animated, completionBlock);
-  } else {
-        RCTExecuteOnMainQueue(^{
-            [viewController.presentingViewController dismissViewControllerAnimated:animated completion:completionBlock];
-            });
+  RCTExecuteOnMainQueue(^{
+    if (self->_dismissalBlock) {
+      self->_dismissalBlock([modalHostView reactViewController], viewController, animated, completionBlock);
+    } else {
+          [viewController.presentingViewController dismissViewControllerAnimated:animated completion:completionBlock];
   }
+  })
 }
 
 - (RCTShadowView *)shadowView