Check whether dock is visible

gistfile1.txt

- (BOOL)isDockVisible
{
    pid_t pid = 0;
    for (NSRunningApplication *runningApp in
         [[NSWorkspace sharedWorkspace] runningApplications]) {
        if ([[runningApp bundleIdentifier] isEqualToString:@"com.apple.dock"]) {
            pid = [runningApp processIdentifier];
            break;
        }
    }
    
    BOOL isVisible = NO;
    CFArrayRef windowList = CGWindowListCopyWindowInfo(kCGWindowListOptionOnScreenOnly, kCGNullWindowID);
    for (NSDictionary *entry in (__bridge NSArray*)windowList) {
        if (   [[entry objectForKey:(id)kCGWindowOwnerPID] intValue] == pid
            && [[entry objectForKey:(id)kCGWindowLayer] intValue] > 0) {
            isVisible = YES;
            break;
        }
    }
    CFRelease(windowList);
    NSLog(@"%d", isVisible);
    return isVisible;
}