第 2 步:alert_example.js
我们将创建一个按钮来触发showAlert功能。
import React from 'react'
import { Alert, Text, TouchableOpacity, StyleSheet } from 'react-native'
const AlertExample = () => {
const showAlert = () =>{
Alert.alert(
'You need to...'
)
}
return (
<TouchableOpacity onPress = {showAlert} style = {styles.button}>
<Text>Alert</Text>
</TouchableOpacity>
)
}
export default AlertExample
const styles = StyleSheet.create ({
button: {
backgroundColor: '#4ba37b',
width: 100,
borderRadius: 50,
alignItems: 'center',
marginTop: 100
}
})
输出
单击按钮时,您将看到以下内容 -