@Entry@Componentstruct QuickTestMainPage {    @Provide lightMode: boolean = true; //true 日间模式 false 夜间模式}

import { StyleFit } from './utils/StyleFit';
@Entry@Componentstruct QuickTestMainPage {    @Provide lightMode: boolean = true; //true 日间模式 false 夜间模式    aboutToAppear() {       this.lightMode = StyleFit.getLightMode();  }}

export class StyleFit {  private static lightMode: boolean = true; // true 日间模式 false 夜间模式
  static init() {     PreferencesUtil.getString("light_mode").then(value => {      if (value == "1" || value == "") {        /// 日间模式        StyleFit.lightMode = true;      } else {        // 夜间模式        StyleFit.lightMode = false;      }    })  }    static setLightMode(value: boolean) {    StyleFit.lightMode = value;    PreferencesUtil.putSync("light_mode", value ? "1" : "0");  }
  static getLightMode() {    return StyleFit.lightMode;  }}

export enum StyleColor {  backgroundColor, // 背景色  pageColor, // 页面颜色  cardBgColor, // 悬浮卡片背景色  cardBgActiveColor, // 悬浮卡片背景色激活态颜色  textNormalColor, // 普通文字颜色  textBoldColor, // 加粗文字颜色  blackTextActiveColor, // 日间黑色激活文本颜色  texSubColor, // 次文字颜色  shadowColor, // 阴影颜色
}

export class StyleRes {  static getStyleColor(styleColor: StyleColor, lightMode: boolean) {    let color = "#ffffffff";
    switch (styleColor) {      case StyleColor.backgroundColor:        color = lightMode ? "#ffffffff" : "#FF191B27";        break;      case StyleColor.pageColor:        color = lightMode ? "#fff7f8fb" : "#FF191B27";        break;      case StyleColor.cardBgColor:        color = lightMode ? "#ffffffff" : "#FF292B38";        break;      case StyleColor.cardBgActiveColor:        color = lightMode ? "#FFE0EFFF" : "#FF162741";        break;      case StyleColor.textNormalColor:        color = lightMode ? "#FF465069" : "#FF999FB5";        break;      case StyleColor.textBoldColor:        color = lightMode ? "#FF191B27" : "#FF999FB5";        break;      case StyleColor.blackTextActiveColor:        color = lightMode ? "#FF191B27" : "#FF0080FF";        break;      case StyleColor.texSubColor:        color = lightMode ? "#FF465069" : "#FF999FB5";        break;      case StyleColor.shadowColor:        color = lightMode ? "#14000000" : "#FF222634";        break;
    }
    return color;  }}

import { StyleColor, StyleRes } from './utils/StyleRes';
@Componentstruct BotoomTool {    @Consume lightMode: boolean;      build() {      Column() {      }      .backgroundColor(StyleRes.getStyleColor(StyleColor.backgroundColor, this.lightMode))    }}