iOS簡單的文件操作

-(NSArray*) getFilesByPath:(NSString*)path{ // 根據路徑獲取該路徑下所有文件
  NSFileManager *fileManager = [NSFileManager defaultManager];
  NSArray *files = [fileManager subpathsOfDirectoryAtPath: path error:nil];
  return files;
}

-(NSString*) getDocumentsPath{ // 獲取Documents路徑
  NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
  NSString *documentsPath = [paths objectAtIndex:0];
  NSLog(@"Documents路徑：%@",documentsPath);
  return  documentsPath;
}

-(float) getFileSize:(NSString*)path{ // 根據路徑獲取文件大小
  NSFileManager *fileManager = [NSFileManager defaultManager];
  float size = [[fileManager attributesOfItemAtPath:path error:nil] fileSize];
  return size;
}

-(void) deleteFileByPath:(NSString*)path{ // 根據路徑刪除文件
  NSFileManager *fileManager = [NSFileManager defaultManager];
  [fileManager removeItemAtPath:path error:nil];
}

+(float) getFileSizeByPath:(NSString *)path{ // 獲取指定目錄下所有文件的大小
  NSFileManager *fileManager = [NSFileManager defaultManager];
  if (![fileManager fileExistsAtPath:path]) return 0;
  NSEnumerator *childFilesEnumerator = [[fileManager subpathsAtPath:path] objectEnumerator];
  NSString *fileName;
  float fileSize;
  while ((fileName = [childFilesEnumerator nextObject]) != nil){
    NSString* fileAbsolutePath = [path stringByAppendingPathComponent:fileName];
    fileSize += [self fileSizeAtPath:fileAbsolutePath];
  }
  return fileSize/(1024.0*1024.0);
}

+(float) fileSizeAtPath:(NSString*) filePath{ // 獲取指定目錄下單個文件的大小
  NSFileManager* fileManager = [NSFileManager defaultManager];
  if ([fileManager fileExistsAtPath:filePath]){
    float fileSize = [[fileManager attributesOfItemAtPath:filePath error:nil] fileSize];
    return fileSize;
  } else {
    return 0;
  }
}