调用应用商店的 RetrieveProducts
方法时,该方法应该会获取最新的商品元数据以及(可选)当前用户的所有权状态。
此过程完成时,应用商店应该调用在初始化时提供给该商店的 IStoreCallback
的 OnProductsRetrieved
方法,从而提供表示可购商品的 ProductDescription
集合。
如果商品已为用户所有,应用商店可能会填写 ProductDescription
的收据和交易 ID 字段;Unity IAP 将对应用程序尚未处理的任何交易调用应用程序的 ProcessPurchase
方法。
请注意,如果用户离线,应用商店应重试,直到用户重新获得连接为止,注意避免通过激进的轮询来影响游戏性能。
如果由于无法恢复的错误(例如开发者在进行商店配置时犯错)而无法检索商品,则应该调用 IStoreCallback
的 OnSetupFailed
方法,指出原因为 InitializationFailureReason
。
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