I have the following code (full example):
import React, { useState, useEffect } from 'react';
import { SafeAreaView, View, TextInput, Button, StyleSheet } from 'react-native';
const App = () => {
const [textblocks, setTextblocks] = useState([]);
const CreateTextBlockHandler = () => {
let array = [...textblocks];
array.push({text: ''});
setTextblocks(array);
};
const SaveTextHandler = (index, text) => {
let array = [...textblocks];
array[index].text = text;
setTextblocks(array);
};
const RenderTextInputs = () => {
return textblocks.map((item, index) => {
return (
<View key={index}>
<TextInput style={styles.textinput} placeholder="text" value={textblocks[index].text} onChangeText={value => SaveTextHandler(index, value)} />
</View>
);
});
};
return (
<SafeAreaView style={styles.pancontainer}>
<RenderTextInputs />
<Button title="Create textblock" onPress={CreateTextBlockHandler} />
</SafeAreaView>
);
};
const styles = StyleSheet.create({
pancontainer: {
flex: 1,
alignItems: 'center',
justifyContent: 'center'
},
textinput: {
width: 200,
margin: 10,
borderWidth: 1,
borderColor: 'black'
}
});
export default App;
如何运作:我有一个按钮来动态添加新的文本输入框。这个工作正常。问题在于,每输入一个字符后,焦点都会失去。
我创建了一个示例,您可以在此处测试:https://snack.expo.io/BJcHxluyI。
我认为我需要在某个地方保存文本框的引用,然后在每次按键后重新将焦点放回到文本输入框,但我不知道该怎么做。