flutter 清除缓存

import 'dart:io';
import 'package:get/get.dart';
import 'package:oktoast/oktoast.dart';
import 'package:path_provider/path_provider.dart';
import 'package:toptongpin/app/utils/toast_util.dart';

class CacheUtil {
  static dynamic loadCache() async {
    try {
      final _tempDir = await getTemporaryDirectory();
      double value = await _getTotalSizeOfFilesInDir(_tempDir);
      /*tempDir.list(followLinks: false,recursive: true).listen((file){
          //打印每个缓存文件的路径
        print(file.path);
      });*/
      print('临时目录大小: ' + value.toString());
      return _renderSize(value);
    } catch (err) {
      print(err);
    }
  }

  ///递归方式删除目录
  static Future<Null> delDir(FileSystemEntity file) async {
    try {
      if (file is Directory) {
        final List<FileSystemEntity> children = file.listSync();
        for (final FileSystemEntity child in children) {
          await delDir(child);