RN动画制作之放大效果
import React, { Component } from 'react';import {
AppRegistry,
View,
Text,
TouchableHighlight,
Button,
Animated,
ImageBackground
} from 'react-native';
export default class myreact extends Component {
constructor(props) {
super(props);
this.state = {
action:1,
a:new Animated.Value(1)
}
};
render() {
return (
<ImageBackground source={require('./img/0.jpg')}
style={{justifyContent: 'center',alignItems: 'center' }}
>
<Button
onPress={()=>{
this.setState({action:this.state.a})
Animated.timing(
this.state.a,
{
toValue: 10,
duration: 5000,
}
).start()
}
}
title="放大"
color="#841584"
/>
<Animated.View
style={{marginTop: 100,height: 20,width: 20,
backgroundColor: 'red',
transform:[{scale:this.state.action}]}}
>
</Animated.View>
</ImageBackground>
);
}
}
AppRegistry.registerComponent('myreact', () => myreact);
今天再学个新标签ImageBackground,可以放背景图。还是跟上次代码差不多就是改变transform里的scale属性,这次把初始状态设定为1,点击按钮后让他放大10倍,接下来效果图:
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