GameCenter Plugin

Integrate with GameCenter to send your games' highscores from \vpgn to Apple Game Center on iOS devices.

Increase Engagement

Use Game Center to track your users' best scores on a leaderboard and compare their achievements. Configure \vpgn to automatically synchronize new highscores to Game Center.

Challenges

Allow users to challenge their friends on a specific highscore within your game.

Overview

GameCenter plugin is a perfect extension to V-Play Game Network. You can configure V-Play Game Network to automatically synchronize new user highscores to Apple Game Center.

Note: The plugin currently only supports iOS-based devices.

The GameCenter plugin supports the following features:

  • Authentication: Allows players to create and access a Game Center account on iOS-based devices.
  • Leaderboards: Allows to post players' highscores to different leader boards and compare them to friends and to display high score lists within your game.
  • Achievements: Track a player's accomplishments in your game.

GameCenter Examples

Plugin Demo App

To try the plugin or see an integration example have a look at the V-Play Plugin Demo app.

Please also have a look at our plugin example project on GitHub: https://github.com/V-Play/PluginDemo.

Example Usage

The following example shows how to integrate Game Center into your game. Usually you define one item within your GameWindow item and reference it with its id:

 import VPlay 2.0
 import VPlayPlugins 1.0

 GameWindow {

   GameCenter {
     id: gameCenter
   }

 }

Available QML Items

GameCenter

Integrate with GameCenter to send your games' highscores from V-Play Game Network to Apple Game Center on iOS devices

Adding and Activating Plugins

How to Add a V-Play Plugin to your App or Game

When you create a new project, you can choose the Plugin Application template to get your own version of the V-Play Plugin Demo with the plugins you want to include. Open Qt Creator and choose “File / New File or Project”, then select Plugin Application in the V-Play Apps section or Game with Plugins in the V-Play Games section to start the project wizard.

Then select the platforms you want to run your application on. The plugins are available for both iOS & Android. There is a fallback functionality in place on Desktop platforms so your project still works when you call methods of the plugins. This allows you to do the main development on your PC, and for testing the plugin functionality you can run the project on iOS and Android.

After the Kit Selection, you can choose which of the plugins you’d like to add to your project:

Then complete the wizard, your project is now set up with all the correct plugin dependencies for Android & iOS automatically. This includes:

  • Setting up the .gradle file for Android.
  • Setting up the .plist file for iOS.
  • Setting up the .pro file to include the plugin libraries for iOS.

Note: Additional integration steps are still required for most plugins, for example to add the actual plugin libraries for iOS to your project. Please have a look at the integration steps described in the documentation for each of the used plugins.

If you have an existing V-Play application, follow these steps to include a plugin to your app or game:

In Qt Creator, select “File / New File or Project” and choose either V-Play Games or V-Play Apps from Files and Classes. Then select V-Play Plugin and press Choose.

You can now select the plugin you want to add:

The plugin item, which contains the chosen plugin and a short usage example, is now added to your project. To use the item in your project, simply perform these steps:

  • Include the created item (use the name you entered in the template before) in your main.qml file.
  • Modify the .pro file & .plist file for iOS usage. See the iOS integration guide of the chosen plugin for more information.
  • Modify the the .gradle file for Android usage. See the Android integration guide of the chosen plugin for more information.

Note: If you have an existing Qt application, you can also add V-Play Plugins to your app! See here how to do this.

Activating Plugins with a License Key

You can test all plugins as soon as the required integration steps and plugin configuration are completed.

However, the plugins are only available as Trial Versions if they are not activated with a valid license. When you are using unlicensed plugins, a dialog is shown and a watermark overlays your application to notify you about the testing state of the plugin.

All monetization plugins are free to use in all licenses, other plugins are only fully usable if you have purchased the Indie or Enterprise license. To activate plugins and enable their full functionality it is required to create a license key. You can create such a key for your application using the license creation page.

This is how it works:

  • Choose the plugins you want to include in your license key:

  • Click on “Generate License Key” and set the app identifier & version code of your application. You can see that the AdMob plugin was enabled in this license key:

  • Copy the generated licenseKey to your GameWindow or App component.

  • You can now fully use the selected plugins!

Integration

To use the GameCenter plugin you need to add the platform-specific native libraries to your project, described here:

iOS Integration Steps

  1. Add the following lines of code to your .pro file:
     ios {
       VPLAY_PLUGINS += gamecenter
     }
  2. Create a provisioning profile with Game Center enabled at the Apple Developer Account website.
  3. Make sure to add a new application to iTunes Connect and configure your Game Center leaderboards and achievements.

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