应用商店可能会提供不符合跨平台购买流程的其他功能,例如在 Apple 的应用商店刷新应用程序收据的功能。
您应该创建一个接口来定义扩展功能,而其本身将实现 IStoreExtension
接口:
/// <summary>
/// 特定于应用商店的功能。
/// </summary>
public interface IMyExtensions : IStoreExtension
{
// 用于提供用户 ID 的应用商店的假设方法。
String GetUserStoreId();
}
应用程序通过 IExtensionProvider
请求扩展功能。这些应用程序进行此类操作时,Unity IAP 首先尝试将有效状态的应用商店实现转换为请求的类型。
如果该转换失败,Unity IAP 将提供由应用商店模块中 RegisterExtension
的方法注册的任何实例,如果未提供实例,则为 null。
即使在不受支持的平台上运行时,模块也应该为自己定义的扩展接口提供实例,以免强制应用程序开发者使用依赖于平台的编译方式。
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