鸿蒙系统 LocalStorage页面级UI状态存储、将LocalStorage实例从UIAbility共享到一个或多个视图

参考：https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V2/arkts-localstorage-0000001524537149-V2#section13961833151713
此处代码只精简了需要的

import window from '@ohos.window';
export default class EntryAbility extends UIAbility {
  //共享 LocalStorage
  para: Record<string, number> = {
    'PropA': 47
  };
  storage: LocalStorage = new LocalStorage(this.para);
  onWindowStageCreate(windowStage: window.WindowStage) {
    //共享 LocalStorage
    windowStage.loadContent('pages/Index', this.storage, (err, data) => {
      if (err.code) {
        hilog.error(0x0000, 'testTag', 'Failed to load the content. Cause: %{public}s', JSON.stringify(err) ?? '');
        return;
      }
      hilog.info(0x0000, 'testTag', 'Succeeded in loading the content. Data: %{public}s', JSON.stringify(data) ?? '');
    });
  }
}

pages/Index页面中使用，其他页面中使用也是一样的方式

let storage = LocalStorage.GetShared()

@Entry(storage)
@Component
struct Index {
  // @LocalStorageLink变量装饰器与LocalStorage中的'PropA'属性建立双向绑定
  @LocalStorageLink('PropA') storeLinkPropA: number = 1;
  build() {
    Column() {
      Text("storeLinkPropA:" + this.storeLinkPropA.toString()).onClick(()=>{
        this.storeLinkPropA += 1;
      })
    }
  }
}