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它是我第一次用反應本地的動畫庫進行動畫製作。是否可以在屏幕中心進行動畫製作?如果是這樣,我該怎麼做?在屏幕中心動畫框擴展(React Native Animated)
這是我的代碼如下: 我的屏幕左上角基本上有一個60x60的方框,向下1/2屏幕和1/2寬度。我希望它橫向擴展大約150像素。問題是,該框不在屏幕中心擴大
/**
* Sample React Native App
* https://github.com/facebook/react-native
* @flow
*/
import React, { Component } from 'react';
import {
View,
Animated,
Dimensions,
Easing
} from 'react-native';
const {width,height} = Dimensions.get('window')
export default class App extends Component {
constructor(){
super()
this.state = {
width: new Animated.Value(60),//Animated.Value/ValueXY used to hook up animation attributes, also for single values
height: new Animated.Value(60),
animateXY : new Animated.ValueXY({x:0,y:0})//for vectors
}
}
componentWillMount(){
//called when an instance of a component is being created and inserted into the DOM
Animated.sequence([
//function where we add the ending results
Animated.timing(
this.state.animateXY,
{
toValue: {x:0, y:height/2},
duration: 2000
}),
Animated.timing(
this.state.animateXY,
{
toValue: {x:width/2, y:height/2},
duration: 2000,
}),
Animated.timing(
this.state.width,
{
toValue: 150,
duration: 3000
}),
]).start()
}
render() {
return (
<View>
<Animated.View
style={
{
width: this.state.width,
height:this.state.height,
backgroundColor:"teal",
position:'absolute',
top: this.state.animateXY.y,
left: this.state.animateXY.x,
}
}
/>
</View>
);
}
}
任何意見將做!謝謝! Jemma