Deprecated. Use expo-splash-screen directly instead:SplashScreen.preventAutoHideAsync()andSplashScreen.hideAsync(). Learn more.
expo-app-loading tells expo-splash-screen to keep the splash screen visible while the AppLoading component is mounted.| Android Device | Android Emulator | iOS Device | iOS Simulator | Web |
|---|---|---|---|---|
→ npx expo install expo-app-loadingIf you're installing this in a bare React Native app, you should also follow these additional installation instructions.
import React from 'react';
import { Image, Text, View } from 'react-native';
import { Asset } from 'expo-asset';
import AppLoading from 'expo-app-loading';
export default class App extends React.Component {
state = {
isReady: false,
};
render() {
if (!this.state.isReady) {
return (
<AppLoading
startAsync={this._cacheResourcesAsync}
onFinish={() => this.setState({ isReady: true })}
onError={console.warn}
/>
);
}
return (
<View style={{ flex: 1 }}>
<Image source={require('./assets/snack-icon.png')} />
</View>
);
}
async _cacheResourcesAsync() {
const images = [require('./assets/snack-icon.png')];
const cacheImages = images.map(image => {
return Asset.fromModule(image).downloadAsync();
});
return Promise.all(cacheImages);
}
}
import AppLoading from 'expo-app-loading';
Type: Component<AppLoadingProps>
Optional • Type: boolean
Whether to hide the native splash screen as soon as you unmount the AppLoading component.
Auto-hiding is enabled by default. See SplashScreen module for an example.
Deprecated
Type: (error: Error) => void
If startAsync throws an error, it is caught and passed into the function provided to onError.
Deprecated
Type: () => void
(Required if you provide startAsync). Called when startAsync resolves or rejects.
This should be used to set state and unmount the AppLoading component.
Deprecated
Type: () => void
A function that returns a Promise, and the Promise should fulfil when the app is done
loading required data and assets. You can do this process manually if you prefer.
This is mainly for backwards compatibility and it is not recommended.
When provided, requires providing onError prop as well.