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import { Animated, Easing } from 'react-native' | |
class Notification extends Component { | |
constructor(props) { | |
super(props) | |
this.state = { offset: new Animated.Value(props.offset) } // agora recebemos o offset inicial calculado | |
} // do componente pai | |
componentDidMount() { | |
Animated.sequence([ | |
Animated.delay(this.props.delay), // acrescentamos aqui um delay | |
Animated.spring(this.state.offset, { | |
tension: -5, | |
toValue: 0 | |
}), | |
Animated.timing(this.state.offset, { | |
duration: 1000, | |
toValue: -100, | |
easing: Easing.easeInOut | |
}) | |
]).start(() => this.props.removeNotification(this.props.id)) // na função start passamos um callback que será | |
} // chamado ao completar a sequência de animações | |
// para remover a notificação que já foi mostrada | |
// ... | |
} | |
class TopBarNotification extends Component { | |
render() { | |
return this.props.notifications.map((notification, index) => { | |
return ( | |
<Notification | |
key={notification.id} | |
offset={-(100 * (index + 1))} // agora cada notificação tem um offset calculado | |
delay={index === 0 ? 100 : (index + 1) * 2000} // e um delay diferente também, pra que se apresente sucessivamente | |
removeNotification={id => this.props.removeNotification(id)} // após terminar a animação removemos a notificação | |
{...notification} | |
/> | |
) | |
}) | |
} | |
} | |
class App extends Component { | |
state = { notifications: [] } | |
removeNotification(id) { | |
this.setState((state) => { | |
return { | |
notifications: state.notifications.filter(notification => notification.id !== id) | |
} | |
}) | |
} | |
render () { | |
<View> | |
<TopBarNotification | |
{...this.state} | |
removeNotification={id => this.removeNotification(id)} | |
/> | |
<Button | |
onPress={() => this.setState({ notifications: newNotifications })} | |
title="Receive Notifications" | |
/> | |
</View> | |
} | |
} |
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