#鸿蒙学习大百科#如何设置文件的数据等级？

import securityLabel from '@ohos.file.securityLabel';
import { BusinessError } from '@ohos.base';
import common from '@ohos.app.ability.common';
import fs from '@ohos.file.fs';

@Entry
@Component
struct Index {
  //获取UIAbilityContext
  private context = getContext(this) as common.UIAbilityContext;
  build() {
    Row() {
      Column() {
        Text("设置文件的数据等级")
          .fontSize(50)
          .fontWeight(FontWeight.Bold)
          .onClick(() => {
            // 获取需要设备数据等级的文件沙箱路径
            let context = getContext(this) as common.UIAbilityContext; // 获取UIAbilityContext信息
            let pathDir = context.filesDir;
            let filePath = pathDir + '/test.txt';

            //打开文件
            let file = fs.openSync(filePath, fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE);
            // 设置文件的数据等级为s0
            securityLabel.setSecurityLabel(filePath, 's0').then(() => {
              console.info('Succeeded in setSecurityLabeling.');
              fs.closeSync(file);
            }).catch((err: BusinessError) => {
              console.error(`Failed to setSecurityLabel. Code: ${err.code}, message: ${err.message}`);
            });
          })
      }
      .width('100%')
    }
    .height('100%')
  }
}
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