问题描述
我正在实施一个包含应用内购买功能的示例。订阅是非续订类型。
I am implementing a sample which includes the in-app purchase feature. The subscription is of non-renewal type.
如果是自动续订订阅，如果用户已进行购买，并且在有效期内，如果用户重试购买，则iTunes会显示提醒那个
In case of auto-renewal subscription, if the user has made a purchase, and within the validity period if the user retries to make the purchase, the iTunes shows the alert that
并且不会继续进行。用户可以使用应用恢复功能恢复其订阅。
and won't proceed further. The user can restore his subscription using the app restore feature.
但是如果是非续订订阅类型，如果用户已进行购买，并且在有效期内如果用户重试购买，iTunes会显示确认提示
But in case of non-renewal subscription type, if a user has made a purchase, and within the validity period if the user retries to make the purchase, the iTunes shows a confirmation alert that
如果用户按下购买则继续进行。
and if the user presses buy it proceeds further.
所以，我怀疑后一种情况究竟发生了什么（非续订重复订阅）。
So, my doubt is what exactly happens in the later case (non-renewal repeated subscription).
用户是否再次收费？
用户的订阅有效性会怎样？
What happens with the user's subscription validity?
我可以在代码中处理和控制吗？
Can it be handled and controlled inside the code by me?
如果是，任何继续操作的想法都将受到高度赞赏，对我来说非常有帮助。
In case yes, any idea to proceed with would be highly appreciated and will be very helpful for me.
提前致谢。
推荐答案
对于Apple，非续订订阅没有有效期内。幸运或遗憾的是，期间的持续时间取决于开发者。
For Apple, there is no "within the validity period" for non-renewing subscriptions. The duration of the period, fortunately or unfortunately, is left up to the developer.
是的，当用户购买非续订订阅时（或第三次等） ）时间，再次收费。
Yes, when the user buys a non-renewing subscription a second (or third, etc) time, the are charged again.
订阅有效期取决于开发者。
Subscription validity is up to the developer.
这似乎很常见开发人员使用自己的服务器来跟踪非续订订阅的到期时间。例如，这有助于Apple所需的恢复功能。
It seems common for developers to use their own server to track the expiry period of a non-renewing subscription. For example, this helps with the "restore" feature required by Apple.
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