Building Production-Quality React Native iOS Apps with Antigravity

Antigravity can get you to a working prototype fast. The gap between "it runs" and "it's ready for the App Store" is where most of the work actually lives — and where knowing how to use Antigravity effectively makes the difference.

This guide covers the workflow for using Antigravity in React Native iOS development from prototype through production submission, including the prompting patterns that get better output and the checks that catch what AI generation misses.

Project Setup and Context Sharing

Start with an Expo + React Native TypeScript project. Antigravity handles both greenfield and existing projects, but giving it explicit project context from the start produces better code.

# Create Expo project with TypeScript template
npx create-expo-app MyApp --template blank-typescript
cd MyApp
 
# Add standard packages
npx expo install expo-router react-native-safe-area-context react-native-screens

A prompt template for setting project context:

For this React Native + Expo + TypeScript project:
- File-based routing via Expo Router
- React Native Safe Area Context for safe areas
- Supabase as the backend
- Target: iOS 16+

Given this setup, implement [feature description].

Sharing this context upfront consistently produces code that fits your actual project structure rather than generic boilerplate.

Getting Type-Safe Code Generation

Antigravity's output quality on React Native + TypeScript improves significantly when you specify types first. The pattern: ask for type definitions before asking for implementations.

// Request type definitions first, then implementations
// Prompt: "Create type definitions for product data, then build a custom hook that uses them"
 
// Generated type definitions
interface Product {
  id: string;
  name: string;
  price: number;
  imageUrl: string;
  category: ProductCategory;
  inStock: boolean;
}
 
type ProductCategory = 'electronics' | 'clothing' | 'food' | 'other';
 
// Generated custom hook
function useProducts(category?: ProductCategory) {
  const [products, setProducts] = useState<Product[]>([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<Error | null>(null);
 
  useEffect(() => {
    const fetchProducts = async () => {
      try {
        setLoading(true);
        const url = category 
          ? `/api/products?category=${category}` 
          : '/api/products';
        const response = await fetch(url);
        if (!response.ok) throw new Error('Failed to fetch products');
        const data = await response.json();
        setProducts(data);
      } catch (err) {
        setError(err instanceof Error ? err : new Error('Unknown error'));
      } finally {
        setLoading(false);
      }
    };
 
    fetchProducts();
  }, [category]);
 
  return { products, loading, error };
}

Establishing the type contract first prevents type errors from cascading when you integrate components later.

Common Pitfalls and How to Handle Them

iOS-specific UI requirements

Antigravity usually handles Platform.OS correctly, but iOS-specific requirements like status bar styling and safe area handling benefit from explicit prompting:

// Generated component with safe area and iOS-specific handling
// Prompt: "Build a header component that handles the iPhone notch, safe area,
// and sets StatusBar to light-content on iOS"
 
import { View, StatusBar, Platform, StyleSheet } from 'react-native';
import { useSafeAreaInsets } from 'react-native-safe-area-context';
 
interface HeaderProps {
  title: string;
  backgroundColor?: string;
}
 
export function Header({ title, backgroundColor = '#007AFF' }: HeaderProps) {
  const insets = useSafeAreaInsets();
  
  return (
    <View style={[
      styles.container,
      { 
        backgroundColor,
        paddingTop: Platform.OS === 'ios' ? insets.top : 0
      }
    ]}>
      <StatusBar barStyle="light-content" backgroundColor={backgroundColor} />
      {/* Header content */}
    </View>
  );
}
 
const styles = StyleSheet.create({
  container: {
    width: '100%',
    paddingHorizontal: 16,
    paddingBottom: 12,
  }
});

Async error handling

Generated code sometimes has thin error handling. Adding "always include error handling and loading states" to prompts consistently improves output. It's easier to add this instruction upfront than to retrofit error handling after the fact.

Pre-Submission Checklist

Before submitting Antigravity-generated code to App Store review, run through these checks:

Performance

• FlatList has keyExtractor properly defined
• Unnecessary re-renders are prevented with useCallback and useMemo
• Image lazy loading is implemented

Accessibility

• accessibilityLabel is set on interactive elements
• VoiceOver navigation has been tested manually

iOS-specific requirements

• Privacy Manifest (NSPrivacyAccessedAPITypes) is correctly configured
• App Tracking Transparency (ATT) implementation meets App Store guidelines

You can also ask Antigravity to run through these: "Review this code for App Store submission readiness" often surfaces issues in generated code that weren't part of the original implementation request.

For broader Antigravity setup, the getting started guide is the foundation. For agent-powered automation in your development workflow, the AgentKit 2.0 complete guide covers the integration patterns.

Treating Generated Code as an 85% Solution

The mental model that works best in practice: Antigravity code is an 85% implementation. The remaining 15% — performance tuning, edge cases, accessibility depth, platform-specific polish — requires your review and judgment.

That 85% arriving immediately is still enormously valuable. It removes the "blank page" problem and gives you something concrete to improve rather than something abstract to design. Using Antigravity well means accepting that division of labor and applying your time to the parts where it actually matters.