我在 TextInput 的 onChangeText 中遇到 React Native 的 this.setState() 问题。我正在尝试在其下方的 Text 标记中显示 TextInput 的内容。然而,它什么也不显示—— setState() 调用永远不会改变 this.state.searchtext。我也没有错误。预先感谢您的帮助!这是我的代码:
export default class ShowScreen extends Component {
constructor(props) {
super(props);
this.state = {
searchtext: ""
};
}
render() {
var thisscreen = (
<View>
<ScrollView
horizontal={true}
showsHorizontalScrollIndicator={false}
pagingEnabled={true}
>
<View
style={{
flex: 1,
height: totalheight,
justifyContent: "space-around",
alignItems: "center",
width: totalwidth,
backgroundColor: "#FF0000"
}}
>
<TextInput
style={{ height: 80, fontSize: 20 }}
placeholder="placeholder"
value={this.state.searchtext}
onChangeText={searchtext =>
this.setState({ searchtext })
}
ref={input => {
this.textInput = input;
}}
returnKeyType="go"
/>
<Text>{this.state.searchtext}</Text>
</View>
</ScrollView>
</View>
);
return thisscreen;
}
}
在你的 TextInput
添加 value
prop
<TextInput
style={{height: 80, fontSize: 20}}
placeholder="placeholder"
value={this.state.searchtext}
onChangeText={(searchtext) => this.setState({ searchtext })}
ref={input => { this.textInput = input }}
returnKeyType="go"
/>
关于javascript - React Native TextInput setState() 问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/49606526/
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