How do you disable a 3rd party keyboard in your iOS app

Can you disable 3rd party keyboards in iOS?

If so, how?

Does iOS support 3rd party keyboard?

Third-party iOS keyboard apps for the iPhone and iPad are downloaded from the iOS App Store. The keyboards may come bundled in a larger app or may be dedicated to the keyboard. Once an app is downloaded, you'll need to enable the keyboard.

Add this method to your UIApplicationDelegate

-(BOOL)application:(UIApplication *)application shouldAllowExtensionPointIdentifier:(NSString *)extensionPointIdentifier
    {

        if (extensionPointIdentifier == UIApplicationKeyboardExtensionPointIdentifier)
        {
            return NO;
        }

        return YES;
    }

Swift 5.1

Add to AppDelegate.Swift:

func application(application: UIApplication, shouldAllowExtensionPointIdentifier extensionPointIdentifier: String) -> Bool {
    if (extensionPointIdentifier == UIApplication.ExtensionPointIdentifier.keyboard.rawValue) {
        return false
    }

    return true
}