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import React, { Component } from "react";
import { Animated, TextInput, Text, View, StyleSheet, Button } from "react-native";
const force0 = 100; // px/ms
const g = 10;
const t = 1000;
class App extends Component {
state = {
animationProgress: new Animated.Value(0),
alpha: 70,
};
fadeIn = () => {
//start animation
Animated.sequence([
Animated.timing(this.state.animationProgress, {
toValue: 1,
duration: t,
useNativeDriver: true
}),
Animated.timing(this.state.animationProgress, {
toValue: 1,
duration: 250,
useNativeDriver: true
}),
Animated.timing(this.state.animationProgress, {
toValue: 0,
duration: 500,
useNativeDriver: true
}),
]).start();
};
fadeStop = () => {
Animated.timing(this.state.animationProgress).stop();
};
render() {
return (
<View style={styles.container}>
{/*komponent animacyjny*/}
<Animated.View
style={[
styles.fadingContainer,
{
transform:
[{
translateY: Animated.subtract(0, Animated.multiply(Animated.subtract(force0 * Math.sin(this.state.alpha * Math.PI / 180), Animated.multiply(g, this.state.animationProgress.interpolate({
inputRange: [0, 1],
outputRange: [0, 10],
}))), this.state.animationProgress.interpolate({
inputRange: [0, 1],
outputRange: [0, 10],
}))),
},
{translateX: Animated.multiply(force0 * Math.cos(this.state.alpha * Math.PI / 180), this.state.animationProgress.interpolate({
inputRange: [0, 1],
outputRange: [0, 10],
})),},
],
}
]}
>
</Animated.View>
{/*komponent statyczny*/}
<View style={styles.buttonRow}>
<Button title="Rzut" onPress={this.fadeIn} />
<Button title="Stop" onPress={this.fadeStop} />
</View>
<View>
<Text>Be nice, give me int</Text>
<TextInput onChangeText={value => this.setState({ alpha: Number(value) })} value={this.state.alpha}/>
</View>
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
alignItems: "center",
justifyContent: "center",
},
fadingContainer: {
paddingVertical: 8,
paddingHorizontal: 16,
backgroundColor: "powderblue",
opacity: 1,
},
fadingText: {
fontSize: 28,
textAlign: "center",
margin: 10
},
buttonRow: {
flexDirection: "row",
marginVertical: 16
}
});
export default App;
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