Run Shell Command with custom input

Question

Hi,

How can i run a shell command in objective c with a variable E.G system("thisCMD thisParam %@", username);

Answer 1

[NSTask launchedTaskWithLaunchPath:@"thisCMD" arguments:[NSArray arrayWithObject:username]];

Or if username isn't already a string:

[NSTask launchedTaskWithLaunchPath:@"thisCMD" arguments:[NSArray arrayWithObject:[username description]]];

Or if you want to be able to change the format specifier for each argument to something more complicated later:

[NSTask launchedTaskWithLaunchPath:@"thisCMD" arguments:[NSArray arrayWithObject:[NSString stringWithFormat:@"%@", username]]];