How to delete the document directory files?

Solution:

The below function you can pass the filepath and it will delete the file in the directory.Because if you had used in your app once the folder or related data deleted then must delete the file it will be in cache.SO best to remove the data in the document directory.The app load will be high when not removing the files.

Swift:

func removeFile(itemName:String) {
  let fileManager = FileManager.default
  let nsDocumentDirectory = FileManager.SearchPathDirectory.documentDirectory
  let nsUserDomainMask = FileManager.SearchPathDomainMask.userDomainMask
  let paths = NSSearchPathForDirectoriesInDomains(nsDocumentDirectory, nsUserDomainMask, true)
  guard let dirPath = paths.first else {
      return
  }  
  let filePath = "\(dirPath)/\(itemName)"
  do {
    try fileManager.removeItem(atPath: filePath)
  } catch let error as NSError {
    print(error.debugDescription)
  }}

ObJective C:

- (void)removeFile:(NSString *)filename
{
  NSFileManager *fileManager = [NSFileManager defaultManager];
  NSString *documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];

  NSString *filePath = [documentsPath stringByAppendingPathComponent:filename];
  NSError *error;
  BOOL success = [fileManager removeItemAtPath:filePath error:&error];
  if (success) {
      UIAlertView *removedSuccessFullyAlert = [[UIAlertView alloc] initWithTitle:@"Congratulations:" message:@"Successfully removed" delegate:self cancelButtonTitle:@"Close" otherButtonTitles:nil];
      [removedSuccessFullyAlert show];
  }
  else
  {
      NSLog(@"Could not delete the file -:%@ ",[error localizedDescription]);
  }
}