#鸿蒙通关秘籍#怎么在HarmonyOS Next利用Preferences实现数据的本地存储？

onCreate(want: Want, launchParam: AbilityConstant.LaunchParam): void {
  globalThis.getPreferences = () => {
    let preferences: Promise<dataPreferences.Preferences> = dataPreferences.getPreferences(this.context, "appStore");
    return preferences;
  }
}
1.
2.
3.
4.
5.
6.

import dataPreferences from '@ohos.data.preferences';

export const getToken: Function = async () => {
  try {
    let preferences: dataPreferences.Preferences = await globalThis.getPreferences();
    return preferences.getSync('token', '');
  }
  catch (e) {
  }
  return '';
}

export const setToken: Function = async (value: string) => {
  try {
    let preferences: dataPreferences.Preferences = await globalThis.getPreferences();
    preferences.putSync('token', encodeURIComponent(value));
    await preferences.flush();
  } catch (e) {
    console.log(JSON.stringify(e), 'e');
  }
}
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.