React NativeCameraRoll # | Edit on GitHub |
CameraRoll provides access to the local camera roll / gallery.
Methods #
static saveImageWithTag(tag) #
Saves the image to the camera roll / gallery.
On Android, the tag is a local URI, such as "file:///sdcard/img.png".
On iOS, the tag can be one of the following:
- local URI
- assets-library tag
- a tag not matching any of the above, which means the image data will be stored in memory (and consume memory as long as the process is alive)
Returns a Promise which when resolved will be passed the new URI.
static getPhotos(params: object) #
Returns a Promise with photo identifier objects from the local camera
roll of the device matching shape defined by getPhotosReturnChecker.
@param {object} params See getPhotosParamChecker.
Returns a Promise which when resolved will be of shape getPhotosReturnChecker.
Examples # | Edit on GitHub |
'use strict';
const React = require('react-native');
const {
CameraRoll,
Image,
SliderIOS,
StyleSheet,
Switch,
Text,
View,
TouchableOpacity
} = React;
const CameraRollView = require('./CameraRollView');
const AssetScaledImageExampleView = require('./AssetScaledImageExample');
const CAMERA_ROLL_VIEW = 'camera_roll_view';
const CameraRollExample = React.createClass({
getInitialState() {
return {
groupTypes: 'SavedPhotos',
sliderValue: 1,
bigImages: true,
};
},
render() {
return (
<View>
<Switch
onValueChange={this._onSwitchChange}
value={this.state.bigImages} />
<Text>{(this.state.bigImages ? 'Big' : 'Small') + ' Images'}</Text>
<SliderIOS
value={this.state.sliderValue}
onValueChange={this._onSliderChange}
/>
<Text>{'Group Type: ' + this.state.groupTypes}</Text>
<CameraRollView
ref={CAMERA_ROLL_VIEW}
batchSize={20}
groupTypes={this.state.groupTypes}
renderImage={this._renderImage}
/>
</View>
);
},
loadAsset(asset){
if (this.props.navigator) {
this.props.navigator.push({
title: 'Camera Roll Image',
component: AssetScaledImageExampleView,
backButtonTitle: 'Back',
passProps: { asset: asset },
});
}
},
_renderImage(asset) {
const imageSize = this.state.bigImages ? 150 : 75;
const imageStyle = [styles.image, {width: imageSize, height: imageSize}];
const location = asset.node.location.longitude ?
JSON.stringify(asset.node.location) : 'Unknown location';
return (
<TouchableOpacity key={asset} onPress={ this.loadAsset.bind( this, asset ) }>
<View style={styles.row}>
<Image
source={asset.node.image}
style={imageStyle}
/>
<View style={styles.info}>
<Text style={styles.url}>{asset.node.image.uri}</Text>
<Text>{location}</Text>
<Text>{asset.node.group_name}</Text>
<Text>{new Date(asset.node.timestamp).toString()}</Text>
</View>
</View>
</TouchableOpacity>
);
},
_onSliderChange(value) {
const options = CameraRoll.GroupTypesOptions;
const index = Math.floor(value * options.length * 0.99);
const groupTypes = options[index];
if (groupTypes !== this.state.groupTypes) {
this.setState({groupTypes: groupTypes});
}
},
_onSwitchChange(value) {
this.refs[CAMERA_ROLL_VIEW].rendererChanged();
this.setState({ bigImages: value });
}
});
const styles = StyleSheet.create({
row: {
flexDirection: 'row',
flex: 1,
},
url: {
fontSize: 9,
marginBottom: 14,
},
image: {
margin: 4,
},
info: {
flex: 1,
},
});
exports.title = 'Camera Roll';
exports.description = 'Example component that uses CameraRoll to list user\'s photos';
exports.examples = [
{
title: 'Photos',
render(): ReactElement { return <CameraRollExample />; }
}
];