swift内购很强大库： github.com/bizz84/Swif…

付费下载，版本删除后重新下载，这时候我们app改成了内购版本，需要判断是否是之前付费下载用户，然后默认打开购买权益。

1）获取Receipt数据, 如果本地有直接获取。

    NSURL *receiptUrl = [[NSBundle mainBundle] appStoreReceiptURL];
    NSData *receiptData = [NSData dataWithContentsOfURL:receiptUrl];
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如果本地没有，去苹果刷新，然后再从本地获取。

        SKReceiptRefreshRequest *refreshReqeust = [[SKReceiptRefreshRequest alloc] init];
        refreshReqeust.delegate = self;
        [refreshReqeust start];
拿Receipt数据去苹果验证
苹果验证域名：
NSString *production = @"https://buy.itunes.apple.com/verifyReceipt"; // 正式环境
NSString *sandbox = @"https://sandbox.itunes.apple.com/verifyReceipt"; // 沙盒环境
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需要将Receipt，base64编码成string，请求参数json如下：
value
                "is_trial_period" = false;
                "original_purchase_date" = "2018-12-13 06:43:11 Etc/GMT";
                "original_purchase_date_ms" = 1544683391000;
                "original_purchase_date_pst" = "2018-12-12 22:43:11 America/Los_Angeles";
                "original_transaction_id" = 1000000486729404;
                "product_id" = "com.xxx";
                "purchase_date" = "2018-12-13 06:43:11 Etc/GMT";
                "purchase_date_ms" = 1544683391000;
                "purchase_date_pst" = "2018-12-12 22:43:11 America/Los_Angeles";
                quantity = 1;
                "transaction_id" = 1000000486729404;
        "original_application_version" = "1.0"; // 最初购买的 App 的版本
        "original_purchase_date" = "2013-08-01 07:00:00 Etc/GMT";
        "original_purchase_date_ms" = 1375340400000;
        "original_purchase_date_pst" = "2013-08-01 00:00:00 America/Los_Angeles";
        "receipt_creation_date" = "2018-12-14 12:28:12 Etc/GMT";
        "receipt_creation_date_ms" = 1544790492000;
        "receipt_creation_date_pst" = "2018-12-14 04:28:12 America/Los_Angeles";
        "receipt_type" = ProductionSandbox;
        "request_date" = "2018-12-18 07:10:21 Etc/GMT";
        "request_date_ms" = 1545117021021;
        "request_date_pst" = "2018-12-17 23:10:21 America/Los_Angeles";
        "version_external_identifier" = 0;
    status = 0;
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通过解析最初购买app的版本original_application_version，跟内购第一个版本进行比较，判断是不是需要恢复购买身份

in_app字段下是内购的信息，可以用来判断是不是内购过。

苹果官方文档： developer.apple.com/cn/app-stor…

本文代码git地址： github.com/342261733/X…

SemyonXu iOS工程师