Example

示例

import React, { Component } from 'react';
import {Picker,StyleSheet } from 'react-native';
export class pageComponent extends Component {
    constructor(props) {
        super(props);
        this.state={
            language:'js'
        }
    }
    render() {
        return (
            <Picker
                selectedValue={this.state.language}
                style={styles.pickerStyle}
                onValueChange={(itemValue, itemIndex) => this.setState({language: itemValue})}>
                <Picker.Item label="Java" value="java" />
                <Picker.Item label="JavaScript" value="js" />
                <Picker.Item label="C++" value="c++" />
            </Picker>
        );
    }


}
const styles = StyleSheet.create({
    pickerStyle:{
        height: 50,
        width: 100
    }
});