如何在多个按钮React Native中更改按下的颜色按钮

Question

我的反应原生应用程序中有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.我对原生的反应是全新的,这就是我的尝试.但它适用于所有按钮.我知道如果我可以拥有具有唯一ID的多个状态,则可以完成.但我不知道这个方法.

<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>

selectionOnPress

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

道具

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

渲染(不添加所有代码,只添加了这篇文章的有用代码)

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