javascript - 如何更改多个按钮中按下颜色的按钮 React Native

Question

我的 React native 应用程序中有 3 个按钮。当用户单击按钮 1 时，我需要将其颜色更改为橙​​色。但其他按钮应具有默认颜色(灰色)。如果用户下次单击按钮 3，颜色应更改为橙色，但第一个按钮颜色应重置为默认值。我对原生 react 完全陌生，这就是我尝试过的。但它适用于所有按钮。我知道如果我可以拥有多个具有唯一 Id 的状态，那是可以做到的。但是我不知道方法。

<Text style={ styles.switchButtonsTitle }>Choose Type of User</Text>
<TouchableOpacity onPress={(userType) =>
    this.selectionOnPress("BASIC")} >
    <Text style={_style}>
        <Text style={styles.switchButtonsText}>BASIC</Text>
    </Text>
</TouchableOpacity>


<TouchableOpacity onPress={(userType) =>
    this.selectionOnPress("INTERMEDIATE")}>
    <Text style={_style}>
        <Text style={styles.switchButtonsText}>INTERMEDIATE</Text>
    </Text>
</TouchableOpacity>

<TouchableOpacity onPress={(userType) =>
    this.selectionOnPress("ADVANCED")}>
    <Text style={{backgroundColor: this.state.backgroundColor}}>
        <Text style={styles.switchButtonsText}>ADVANCED</Text>
    </Text>
</TouchableOpacity>

按下时选择

selectionOnPress(userType) {
    this.setState({
        onClicked: true
    });
} 

Prop

constructor(props) {
    super(props);
    this.state = {
        onClicked: false
    }
    this.selectionOnPress = this.selectionOnPress.bind(this)
}

渲染(不添加所有代码，只添加对这篇文章有用的代码)

render() {
    var _style;
    if (this.state.onClicked) { // clicked button style
        _style = {
            backgroundColor: "red"
        }
    }
    else { // default button style
        _style = {
            backgroundColor: "blue"
        }
    }

Answer 1

我对你的代码做了一些修改

 export default class App extends Component {
constructor(props) {
    super(props);
    this.state = { selectedButton: null };
    this.selectionOnPress = this.selectionOnPress.bind(this);
}

selectionOnPress(userType) {
    this.setState({ selectedButton: userType });
}

render() {
    return (
        <View>
            <Text style={styles.switchButtonsTitle}>
                Choose Type of User
            </Text>
            <TouchableOpacity
                onPress={() => this.selectionOnPress("BASIC")}
            >
                <Text
                    style={{
                        backgroundColor:
                            this.state.selectedButton === "BASIC"
                                ? "red"
                                : "grey"
                    }}
                >
                    <Text style={styles.switchButtonsText}>BASIC</Text>
                </Text>
            </TouchableOpacity>

            <TouchableOpacity
                onPress={() => this.selectionOnPress("INTERMEDIATE")}
            >
                <Text
                    style={{
                        backgroundColor:
                            this.state.selectedButton === "INTERMEDIATE"
                                ? "red"
                                : "grey"
                    }}
                >
                    <Text style={styles.switchButtonsText}>
                        INTERMEDIATE
                    </Text>
                </Text>
            </TouchableOpacity>

            <TouchableOpacity
                onPress={() => this.selectionOnPress("ADVANCED")}
            >
                <Text
                    style={{
                        backgroundColor:
                            this.state.selectedButton === "ADVANCED"
                                ? "red"
                                : "grey"
                    }}
                >
                    <Text style={styles.switchButtonsText}>
                        INTERMEDIATE
                    </Text>
                </Text>
            </TouchableOpacity>
        </View>
    );
}
}


... don't forget to define your styles