Question

我按照此链接进行应用内购买（http://troybrant.net/blog/2010/01/in-app-purchases-a-full-walkthrough/comment-page-20/#comment-22550）。使用Sandbox测试用户（有美国领土）我可以成功购买产品。如果再次按下购买按钮，我需要恢复产品。我怎么知道产品是否已经购买？我需要验证自动续订订阅的收据。我能怎么做？使用目标c。

Answer 1

首先，实施自定义付款类符合协议SKPaymentTransactionObserver。此课程可用于接收付款信息：

<强>·H

#import <StoreKit/StoreKit.h>

@interface PaymentObserver : NSObject<SKPaymentTransactionObserver>
+ (instancetype)sharedInstance;
@end

<强>的.m：

@implementation PaymentObserver

+ (instancetype)sharedInstance{
    static PaymentObserver * instance = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        instance = [[PaymentObserver alloc] init];
    });
    return instance;
}

- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray<SKPaymentTransaction *> *)transactions {
    for (SKPaymentTransaction *transaction in transactions) {
        switch (transaction.transactionState) {
                // Call the appropriate custom method for the transaction state.
            case SKPaymentTransactionStatePurchasing:
                break;
            case SKPaymentTransactionStateDeferred:
                break;
            case SKPaymentTransactionStateFailed:
                break;
            case SKPaymentTransactionStatePurchased:
                break;
            case SKPaymentTransactionStateRestored:
                //Purchased product info goes here. Get more details in transaction object.
                break;
            default:
                break;
        }
    }
}

然后，在AppDelegate中，使用上述类检索付款信息：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    //......
    [[SKPaymentQueue defaultQueue] addTransactionObserver:[PaymentObserver sharedInstance]];
    //......
}

PaymentObserver类将从AppStore获取购买的产品信息。

主程序是这样的。您将有更多细节要处理它们。

在App Purchase Restore中无效

1 个答案: