Question

How would I use NSRunningApplication? I have something opposite of that which is launching an app:

[[NSWorkspace sharedWorkspace] launchApplication:appName];

but I want to close one. I get an error when I debug the code for NSRunningApp which is this:

NSRunningApplication *selectedApp = appName;
[selectedApp terminate];

Is there something wrong? if there is please point it out and how to fix it.

Answer 1

You assign the variable selectedApp a NSString. Strings don’t have the - (void)terminate method and therefore it fails. You have to get a NSRunningApplication instance pointing to the application.

NSWorkspace *sharedWorkspace = [NSWorkspace sharedWorkspace];
NSString *appPath = [sharedWorkspace fullPathForApplication:appName];
NSString *identifier = [[NSBundle bundleWithPath:appPath] bundleIdentifier];
NSArray *selectedApps =
       [NSRunningApplication runningApplicationsWithBundleIdentifier:identifier];
// quit all
[selectedApps makeObjectsPerformSelector:@selector(terminate)];