Created
February 22, 2018 10:59
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Sample smart error component which slides from top, shows for a second, and slides back up
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| import React, { Component } from 'react'; | |
| import { connect } from 'react-redux'; | |
| import { StatusBar, Text, Animated } from 'react-native'; | |
| import { getErrorMessage, getErrorId } from '../reducers/selectors'; | |
| const HIDDEN = -20; | |
| const SHOWN = 0; | |
| class ErrorNotification extends Component { | |
| constructor(props) { | |
| super(props); | |
| this.animated = { | |
| top: new Animated.Value(HIDDEN) | |
| }; | |
| this.state = { | |
| shown: false | |
| }; | |
| } | |
| componentWillReceiveProps(nextProps) { | |
| if (nextProps.error_id !== this.props.error_id) { | |
| this.setState({ shown: true }); | |
| Animated.sequence([ | |
| Animated.timing(this.animated.top, { | |
| toValue: SHOWN, | |
| useNativeDriver: true | |
| }), | |
| Animated.delay(1000), | |
| Animated.timing(this.animated.top, { | |
| toValue: HIDDEN, | |
| useNativeDriver: true | |
| }) | |
| ]).start(() => { | |
| this.setState({ shown: false }); | |
| }); | |
| } | |
| } | |
| render() { | |
| if (this.state.shown) { | |
| return ( | |
| <Animated.View | |
| style={{ | |
| position: 'absolute', | |
| top: 0, | |
| left: 0, | |
| right: 0, | |
| height: 20, | |
| transform: [{ translateY: this.animated.top }], | |
| overflow: 'hidden', | |
| justifyContent: 'center', | |
| alignItems: 'center', | |
| backgroundColor: 'red' | |
| }} | |
| > | |
| <Text style={{ fontSize: 8, color: 'white', fontWeight: 'bold' }}> | |
| {this.props.message} | |
| </Text> | |
| </Animated.View> | |
| ); | |
| } else { | |
| return null; | |
| } | |
| } | |
| } | |
| function mapStateToProps(state) { | |
| return { | |
| message: getErrorMessage(state), | |
| error_id: getErrorId(state) | |
| }; | |
| } | |
| export default connect(mapStateToProps)(ErrorNotification); |
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