NSOpenPanel选择目录(不是文件)

Question

我想让用户选择保存文件的目录.但是如何确保url是一个目录而不是一个文件？

NSOpenPanel* panel = [NSOpenPanel openPanel];
[panel setCanChooseDirectories:YES];
[panel setCanCreateDirectories:YES];

[panel beginSheetModalForWindow:self.window completionHandler:^(NSInteger result){
    if (result == NSFileHandlingPanelOKButton) {
        NSArray* urls = [panel URLs];
        for (NSURL *url in urls) {
            //here how to judge the url is a directory or a file
        }
    }
}];

Answer 1

未来阅读此内容的任何人的更新:

在Swift中,可以通过使用来检查选择的路径是否是文件

panel.canChooseFiles = false

Answer 2

// First, check if the URL is a file URL, as opposed to a web address, etc.
if (url.isFileURL) {
  BOOL isDir = NO;
  // Verify that the file exists 
  // and is indeed a directory (isDirectory is an out parameter)
  if ([[NSFileManager defaultManager] fileExistsAtPath: url.path isDirectory: &isDir]
      && isDir) {
    // Here you can be certain the url exists and is a directory
  }
}