Quick debug button for iOS apps

button.md

Copy-and-paste this over the last few lines of application:didFinishLaunchingWithOptions:

  UIButton *debugButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
  debugButton.frame = CGRectMake(0.f, 20.f, 44.f, 44.f);
  [debugButton addTarget:self action:@selector(didPressDebugButton) forControlEvents:UIControlEventTouchUpInside];
  [self.window addSubview:debugButton];

  return YES;  
}

- (void)didPressDebugButton
{
  NSLog(@"boink!");
}