objective-c - 打开文件对话框

Question

我正在学习Objective-C并尝试开发一个简单的拉链应用程序，但是我现在停止了，当我需要在我的对话框中插入一个按钮并且这个按钮打开一个打开文件对话框，它将选择一个要压缩的文件，但是我从未使用过打开文件对话框，那么我如何打开它并将用户选择的文件存储在一个char*？谢谢。

请记住，我使用的是 GNUstep(Linux)。

Answer 1

谢谢@Vlad the Impala 我正在为使用 OS X v10.6+ 的人更新你的答案

// Create the File Open Dialog class.
NSOpenPanel* openDlg = [NSOpenPanel openPanel];

// Enable the selection of files in the dialog.
[openDlg setCanChooseFiles:YES];

// Multiple files not allowed
[openDlg setAllowsMultipleSelection:NO];

// Can't select a directory
[openDlg setCanChooseDirectories:NO];

// Display the dialog. If the OK button was pressed,
// process the files.
if ( [openDlg runModal] == NSOKButton )
{
    // Get an array containing the full filenames of all
    // files and directories selected.
    NSArray* urls = [openDlg URLs];

    // Loop through all the files and process them.
    for(int i = 0; i < [urls count]; i++ )
    {
        NSString* url = [urls objectAtIndex:i];
        NSLog(@"Url: %@", url);
    }
}

Answer 2

如果其他人需要这个答案，这里是：

 int i;
  // Create the File Open Dialog class.
  NSOpenPanel* openDlg = [NSOpenPanel openPanel];

  // Enable the selection of files in the dialog.
  [openDlg setCanChooseFiles:YES];

  // Multiple files not allowed
  [openDlg setAllowsMultipleSelection:NO];

  // Can't select a directory
  [openDlg setCanChooseDirectories:NO];

  // Display the dialog. If the OK button was pressed,
  // process the files.
  if ( [openDlg runModalForDirectory:nil file:nil] == NSOKButton )
  {
   // Get an array containing the full filenames of all
   // files and directories selected.
   NSArray* files = [openDlg filenames];

   // Loop through all the files and process them.
   for( i = 0; i < [files count]; i++ )
   {
   NSString* fileName = [files objectAtIndex:i];
   }

Answer 3

对于使用 OS X v10.10+ 的人，请替换 Far Jangtrakool 答案：

if ( [openDlg runModal] == NSOKButton )

经过

if ( [openDlg runModal] == NSModalResponseOK )