Created
July 22, 2015 02:48
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React Native Loading Animation
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/** | |
* LoadingView | |
*/ | |
'use strict'; | |
var React = require('react-native'); | |
var { | |
TouchableWithoutFeedback, | |
Animated, | |
StyleSheet, | |
Image, | |
View, | |
Easing | |
} = React; | |
var TIMES = 400; | |
var LoadingView = React.createClass({ | |
getInitialState() { | |
return { | |
angle: new Animated.Value(0), | |
}; | |
}, | |
componentDidMount() { | |
this._animate(); | |
}, | |
_animate() { | |
this.state.angle.setValue(0); | |
this._anim = Animated.timing(this.state.angle, { | |
toValue: 360*TIMES, | |
duration: 800*TIMES, | |
easing: Easing.linear | |
}).start(this._animate); | |
}, | |
componentDidUnmount:function(){ | |
}, | |
render() { | |
return ( | |
<View style={styles.container}> | |
<Animated.Image | |
source={{uri: 'MGJControls.bundle/loading_circle.png'}} | |
style={[ | |
styles.rotateCard, | |
{transform: [ | |
{rotate: this.state.angle.interpolate({ | |
inputRange: [0, 360], | |
outputRange: ['0deg', '360deg'] | |
})}, | |
]}]}> | |
</Animated.Image> | |
</View> | |
); | |
} | |
}); | |
var styles = StyleSheet.create({ | |
container: { | |
flex: 1, | |
justifyContent: 'center', | |
alignItems: 'center' | |
}, | |
rotateCard: { | |
width:35, | |
height:35, | |
justifyContent:'center', | |
backgroundColor:'transparent' | |
} | |
}); | |
module.exports = LoadingView; |
You have to change the duration value to make it smoother.
How would this work to animate, for example, from 0 to 270deg and stop?
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Very nice work! A little comment. componentDidUnmount is not a valid method. please correct this with componentWillUnmount.
You can add the option to stop the animation in there.
componentWillUnmount()
{
this._anim.stopAnimation();
}