-[NSWorkspace openApplicationAtURL:configuration:completionHandler:] does not work

Question

Created Nov ’20

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There is a LoginItem in my app that launches the application. It works fine with approximately the following code snippet:

Code Block     NSBundle* bundle = NSBundle.mainBundle;
    NSWorkspace* workspace = NSWorkspace.sharedWorkspace;
    NSString* path = bundle.bundlePath;
    for (int i = 0; i < 4; ++i) {
      path = [path stringByDeletingLastPathComponent];
    }
    NSDictionary* configuration = @{ NSWorkspaceLaunchConfigurationEnvironment: env };
    NSError* error = nil;
    [workspace launchApplicationAtURL: [NSURL fileURLWithPath: path] options: NSWorkspaceLaunchDefault configuration: configuration error: &error];
    if (error) {
      NSLog(@"Failed to run the app: %@", error.localizedDescription);
    }

Since 11.0, launchApplicationAtURL: is deprecated in favour of openApplicationAtURL:. When I try to use it instead, the application does not start at all and no error is reported. What am I doing wrong? The new code looks like this:

Code Block     NSWorkspaceOpenConfiguration* configuration = [NSWorkspaceOpenConfiguration configuration];
    [configuration setEnvironment: env];
    [configuration setPromptsUserIfNeeded: YES];
    [workspace openApplicationAtURL: [NSURL fileURLWithPath: path] configuration: configuration completionHandler:^(NSRunningApplication* app, NSError* error) {
      if (error) {
        NSLog(@"Failed to run the app: %@", error.localizedDescription);
      }
    }];

Answered by vokbuz in 651655022

Figured it out. The login item quits too soon. It should wait for the open operation to be completed. Something like (not the best solution, for illustrative purpose only):

Code Block [workspace openApplicationAtURL: [NSURL fileURLWithPath: path] configuration: configuration completionHandler:^(NSRunningApplication* app, NSError* error) {
  if (error) {
    NSLog(@"Failed to run the app: %@", error.localizedDescription);
  }
  exit(0);
}];
[NSThread sleepForTimeInterval: 10];

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Answer 1

vokbuz OP

Dec ’20

Accepted Answer

Figured it out. The login item quits too soon. It should wait for the open operation to be completed. Something like (not the best solution, for illustrative purpose only):

Code Block [workspace openApplicationAtURL: [NSURL fileURLWithPath: path] configuration: configuration completionHandler:^(NSRunningApplication* app, NSError* error) {
  if (error) {
    NSLog(@"Failed to run the app: %@", error.localizedDescription);
  }
  exit(0);
}];
[NSThread sleepForTimeInterval: 10];

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