我正在尝试为单击的图标(“列表”和“网格”)应用有效颜色,但是由于RN中的新特性,因此找不到正确的解决方案。我已经分别粘贴了组件代码以供他人参考。
代码:
export default class Gallery extends Component {
state = {
loading: true,
gridView: true,
iconColor: "#ccc"
};
changeViewList = () => {
this.setState({ gridView: false });
};
changeViewGrid = () => {
this.setState({ gridView: true });
};
render() {
const { imageData, loading } = this.state;
return (
<View style={{ flex: 1 }}>
<TouchableOpacity activeOpacity={0.8} onPress={this.changeViewGrid}>
<Icon name="th-large" size={25} color={this.state.iconColor} />
</TouchableOpacity>
<TouchableOpacity activeOpacity={0.8} onPress={this.changeViewList}>
<Icon name="list" size={25} style={styles.iconAlign} color= {this.state.iconColor} />
</TouchableOpacity>
</View>
);
}
}
const styles = StyleSheet.create({
btnDesign: {
padding: 10,
backgroundColor: "#e45",
width: "30%",
alignSelf: "center",
marginBottom: 10
},
btnText: {
color: "#fff",
textAlign: "center",
alignSelf: "center"
}
});
图片参考:
预期为:
列表视图
答案 0 :(得分:1)
您可以使用color prop中的三元运算符根据变量对图标着色。
// if the this.state.gridView is true colorize the icon green otherwise take the standard color
<Icon name="th-large" size={25} color={this.state.gridView ? 'green' : this.state.iconColor } />
在这里您可以用另一种方法来做:
// if this.state.gridView is true, take the regular color otherwise use make it green
<Icon name="list" size={25} style={styles.iconAlign} color= {this.state.gridView ? this.state.iconColor : 'green' } />