import React, { useState, useEffect } from 'react';
import { Button, Image, StyleSheet, View } from 'react-native';
import { Asset } from 'expo-asset';
import { manipulateAsync, FlipType, SaveFormat } from 'expo-image-manipulator';

export default function App() {
  const [ready, setReady] = useState(false);
  const [image, setImage] = useState(null);

  useEffect(() => {
    (async () => {
      const image = Asset.fromModule(require('./assets/snack-icon.png'));
      await image.downloadAsync();
      setImage(image);
      setReady(true);
    })();
  }, []);

  const _rotate90andFlip = async () => {
    const manipResult = await manipulateAsync(
      image.localUri || image.uri,
      [
        { rotate: 90 },
        { flip: FlipType.Vertical },
      ],
      { compress: 1, format: SaveFormat.PNG }
    );
    setImage(manipResult);
  };

  const _renderImage = () => (
    <View style={styles.imageContainer}>
      <Image
        source={{ uri: image.localUri || image.uri }}
        style={styles.image}
      />
    </View>
  );

  return (
    <View style={styles.container}>
      {ready && image && _renderImage()}
      <Button title="Rotate and Flip" onPress={_rotate90andFlip} />
    </View>
  );
}

%%placeholder-start%%const styles = StyleSheet.create({ ... }); %%placeholder-end%%const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
  },
  imageContainer: {
    marginVertical: 20,
    alignItems: 'center',
    justifyContent: 'center',
  },
  image: {
    width: 300,
    height: 300,
    resizeMode: 'contain',
  },
});

Returns

• Promise<ImageResult>

Promise which fulfils with ImageResult object.