我正在学习React Native的教程,但它们是针对iOS操作系统的。有一个部分他们使用了AlertIOS.prompt方法,就像这样:
AlertIOS.prompt(
'Add New Item',
null,
[
{text: 'Cancel', onPress: () => console.log('Cancel Pressed'), style: 'cancel'},
{
text: 'Add',
onPress: (text) => {
this.itemsRef.push({ title: text })
}
},
],
'plain-text'
);
我正在尝试为Android重新制作这个程序,但无法使其运行。我找到了这个https://www.npmjs.com/package/react-native-prompt
import Prompt from 'react-native-prompt';
<Prompt
title="Say something"
placeholder="Start typing"
defaultValue="Hello"
visible={ this.state.promptVisible }
onCancel={ () => this.setState({
promptVisible: false,
message: "You cancelled"
}) }
onSubmit={ (value) => this.setState({
promptVisible: false,
message: `You said "${value}"`
}) }/>
然而,我无法让它起作用,它应该在我按下按钮时显示提示,但什么也没有发生。以下是使用AlertIOS的完整原始代码。
'use strict';
import React, {Component} from 'react';
import ReactNative from 'react-native';
const firebase = require('firebase');
const StatusBar = require('./components/StatusBar');
const ActionButton = require('./components/ActionButton');
const ListItem = require('./components/ListItem');
const styles = require('./styles.js')
const {
AppRegistry,
ListView,
StyleSheet,
Text,
View,
TouchableHighlight,
AlertIOS,
} = ReactNative;
// Initialize Firebase
const firebaseConfig = {
apiKey: "AIzaSyA9y6Kv10CAl-QOnSkMehOyCUejwvKZ91E",
authDomain: "dontforget.firebaseapp.com",
databaseURL: "https://dontforget-bd066.firebaseio.com",
storageBucket: "dontforget-bd066.appspot.com",
};
const firebaseApp = firebase.initializeApp(firebaseConfig);
class dontforget extends Component {
constructor(props) {
super(props);
this.state = {
dataSource: new ListView.DataSource({
rowHasChanged: (row1, row2) => row1 !== row2,
})
};
this.itemsRef = this.getRef().child('items');
}
getRef() {
return firebaseApp.database().ref();
}
listenForItems(itemsRef) {
itemsRef.on('value', (snap) => {
// get children as an array
var items = [];
snap.forEach((child) => {
items.push({
title: child.val().title,
_key: child.key
});
});
this.setState({
dataSource: this.state.dataSource.cloneWithRows(items)
});
});
}
componentDidMount() {
this.listenForItems(this.itemsRef);
}
render() {
return (
<View style={styles.container}>
<StatusBar title="Grocery List" />
<ListView
dataSource={this.state.dataSource}
renderRow={this._renderItem.bind(this)}
enableEmptySections={true}
style={styles.listview}/>
<ActionButton onPress={this._addItem.bind(this)} title="Add" />
</View>
)
}
_addItem() {
AlertIOS.prompt(
'Add New Item',
null,
[
{text: 'Cancel', onPress: () => console.log('Cancel Pressed'), style: 'cancel'},
{
text: 'Add',
onPress: (text) => {
this.itemsRef.push({ title: text })
}
},
],
'plain-text'
);
}
_renderItem(item) {
const onPress = () => {
AlertIOS.alert(
'Complete',
null,
[
{text: 'Complete', onPress: (text) => this.itemsRef.child(item._key).remove()},
{text: 'Cancel', onPress: (text) => console.log('Cancelled')}
]
);
};
return (
<ListItem item={item} onPress={onPress} />
);
}
}
AppRegistry.registerComponent('dontforget', () => dontforget);
有人能告诉我如何在安卓设备上使这个工作吗?