Application:openFiles: separate files by groups

I need that my application detect how many files has been dropped to it dock ic开发者_开发问答on. For this i use application:openFiles: method

- (void)application:(NSApplication *)sender openFiles:(NSArray *)filenames
{
  NSLog(@"%d",[filenames count]);
}

But unfortunately files sometimes separates by group. So, for example i dragged 3 files to dock icon and get this output:

2
1

How could it be?

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Unfortunately that's life. If you really need to count the number of files received in a drop to the Dock icon, you need to set up a timer to combine the results received by the call application:openFiles: within a second (or some appropriate length of time.)