ios 恢复已在 iPhone 上购买的应用内购买？
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Restore already bought in-app-purchases on iPhone?
提问by Daniel Brown
I got so far: After a reinstall, a user needs to click "buy feature", then he gets scared with the $0.99 question, then has to login and then gets told the feature is already bought and he gets it for free.
我到目前为止：重新安装后，用户需要单击“购买功能”，然后他被 0.99 美元的问题吓坏了，然后必须登录，然后被告知该功能已经购买，他可以免费获得。
I know apple is a religion and users are strong believers, but isn't there a better way? :-) What I want is to check for the feature without actually buying it. Letting the user enter his account info seems to be neccessary, maybe buy a $0.00 feature? or is there a method somewhere that does this?
我知道苹果是一种宗教，用户是坚定的信徒，但没有更好的方法吗？:-) 我想要的是在不实际购买的情况下检查该功能。让用户输入他的帐户信息似乎是必要的，也许购买 0.00 美元的功能？或者有什么方法可以做到这一点？
I'm using MKStoreKit for the whole In-App-Purchase, but any solution would be great.
我在整个应用内购买中使用 MKStoreKit，但任何解决方案都会很棒。
UPDATE
更新
thanx to darvids0n, your method solved my problem! here's some working code for others trying the same:
感谢darvids0n，你的方法解决了我的问题！这是其他人尝试相同的一些工作代码：
- (void)removePreviousPurchases { //just for sandbox testing
[[MKStoreManager sharedManager] removeAllKeychainData];
}
- (void)restorePreviousPurchases { //needs account info to be entered
if([SKPaymentQueue canMakePayments]) {
[[MKStoreManager sharedManager] restorePreviousTransactionsOnComplete:^(void) {
NSLog(@"Restored.");
/* update views, etc. */
}
onError:^(NSError *error) {
NSLog(@"Restore failed: %@", [error localizedDescription]);
/* update views, etc. */
}];
}
else
{
NSLog(@"Parental control enabled");
/* show parental control warning */
}
}
采纳答案by Daniel Brown
If the $0.99 item is non-consumable, then you should provide a "Restore Purchases" button (or similar) which calls
如果 0.99 美元的物品是非消耗品，那么您应该提供一个“恢复购买”按钮（或类似的），它会调用
[[SKPaymentQueue defaultQueue] restoreCompletedTransactions];
Assuming you've added a transaction observer already, and implemented the protocolincluding a case to handle a restored transaction (with state SKPaymentTransactionStateRestored) this will work.
假设你已经添加了一个交易的观察者已经，并实施了协议，包括处理一个恢复交易（与状态的情况下SKPaymentTransactionStateRestored），这将工作。
回答by manish
Add these two methods :
添加这两个方法：
[[SKPaymentQueue defaultQueue] addTransactionObserver:self];
[[SKPaymentQueue defaultQueue]restoreCompletedTransactions];
