我创建了一个世博会小吃,它有一个更接近您想要实现的用户界面的示例。但我会把细节留给你来解决。
import React from 'react';
import { StyleSheet, Text, View, TextInput, Picker } from 'react-native';
export default class App extends React.Component {
constructor(props) {
super(props);
}
state = {
b1text: 'Kg',
b2text: 'Cm',
weight: '',
height: '',
standard: 'Metric',
};
render() {
return (
<View style={styles.container}>
<View style={styles.top}>
<Picker
selectedValue={this.state.standard}
onValueChange={itemValue => {
this.setState({ standard: itemValue });
if (itemValue === 'Metric') {
this.setState({ b1text: 'Kg' });
this.setState({ b2text: 'Cm' });
}
if (itemValue === 'Imperial') {
this.setState({ b1text: 'Lbs' });
this.setState({ b2text: 'Inches' });
}
}}>
<Picker.Item label="Metric" value="Metric" />
<Picker.Item label="Imperial" value="Imperial" />
</Picker>
</View>
<View style={styles.bottom}>
<TextInput
style={{
height: 40,
width: 60,
borderColor: 'gray',
borderWidth: 1,
}}
onChangeText={() => this.setState({ text: weight })}
value={this.state.weight}
/>
<Text>{this.state.b1text}</Text>
<TextInput
style={{
height: 40,
width: 60,
borderColor: 'gray',
borderWidth: 1,
}}
onChangeText={() => this.setState({ text: height })}
value={this.state.height}
/>
<Text>{this.state.b2text}</Text>
</View>
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
},
top: {
width: '100%',
flex: 1,
},
bottom: {
flex: 1,
alignItems: 'center',
},
});
你需要学习如何用
react-native
. 这是一个资源,其中包含了所有可用于的样式属性的指南
const {StyleSheet} from 'react-native'.
https://github.com/vhpoet/react-native-styling-cheat-sheet
祝你好运:)