iOS Smart Keyboard (BlueTooth) For Games and Apps (KeyPress / KeyReleased)

SmartKeyboardExampleViewController.mm

// ...
// Attach to your main ViewController that you want to respond to the iOS Smart Keyboard

- (BOOL)canBecomeFirstResponder {
    return YES;
}

// Overloaded _keyCommandForEvent (UIResponder.h) // Only exists in iOS 9+ so this function can be unguarded added to iOS 8 targets
-(UIKeyCommand *)_keyCommandForEvent:(UIEvent *)event // UIPhysicalKeyboardEvent
{
#ifndef NDEBUG 
   // debug mode only
    NSLog(@"%s\nKeyCode:%@\nisKeyDown:%@\n\n", "_keyCommandForEvent:", [event valueForKey:@"_keyCode"], [event valueForKey:@"_isKeyDown"]);
#endif

    int theKeyCode = [[event valueForKey:@"_keyCode"] intValue];
    BOOL isTheKeyDown = [[event valueForKey:@"_isKeyDown"] boolValue];
    // use the following switch if you want to quickly filter out keys. Else just call handleCommand
    BOOL filterKeys = YES;
    if(filterKeys) {
      switch (theKeyCode) {
          case 80: // Left Arrow
          case 79: // Right Arrow
          case 4: // A
          case 7: // D
          case 26: // W
          case 1: // S
          case 42: // ESC
          case 43: // TAB
          case 40: // Enter / return
          case 44: // Space
          case 82: // Up Arrow
          case 81: // Down Arrow
          {
              // Do Keyevent Handling if it's one of the above keys only
              [self handleCommand:theKeyCode isKeyDown:isTheKeyDown];
              break;
          }
          default:
              // Nothing.
              break;
      }
    } else {
      [self handleCommand:theKeyCode isKeyDown:isTheKeyDown];
    }
    return nil;
}

- (void)handleCommand:(int)keyCode isKeyDown:(BOOL)isTheKeyDown
{
    // do your own magic here while listening to drum and bass ;D https://www.youtube.com/watch?v=kjBKad1z81M
}