如何保存或存储SKPayment交易？

Question

我想将SKPayment交易存储在用户默认值或设备上,我还想将交易数据存储在我的服务器上以后(尚未完成),以便用户可以在需要时恢复订阅/必要/可能.

我遇到的问题是我尝试保存到用户默认值,但它一直告诉我:

* - [NSUserDefaults setObject:forKey:]:尝试插入非属性值'{transaction =""; ''类'__NSCFDictionary'.

我使用的代码是:

 // Save
    NSMutableDictionary *dict = [NSMutableDictionary dictionary];
    [dict setObject:transaction forKey:@"transaction"];    
    [[NSUserDefaults standardUserDefaults] setObject:dict forKey:@"TransactionReceipt"];
    [[NSUserDefaults standardUserDefaults] synchronize];

    // Read    
    NSMutableDictionary *savedDict =  [[NSUserDefaults standardUserDefaults] objectForKey:@"MyTransactionReceipt"];
    [[NSUserDefaults standardUserDefaults] synchronize];

    NSLog(@"Saved stored transaction = %@", savedDict);

我也尝试保存Transaction对象本身,而不是将其存储在字典中,但这总是会给出错误,它会抱怨它

"尝试插入非插入属性值..."

我也尝试过使用NSKeyedArchiver,但我不知道如何编写它来处理SKPaymentTransaction的读写.

任何有关这方面的帮助将非常感激.

谢谢.

Answer 1

我已经通过将事务数据存储在文档目录中的plist中来解决了这个问题.

这对我的要求来说更容易,也更可靠.

对于那些希望这样做的人来说,基本代码也是如此.

// WRITING        
// Save to documents directory
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];

NSString *receiptStorageFile = [documentsDirectory stringByAppendingPathComponent:@"receipts.plist"];

NSLog(@"Reciept Storage File = %@", receiptStorageFile);

NSMutableArray *receiptStorage = [[NSMutableArray alloc] initWithContentsOfFile:receiptStorageFile];
if(!receiptStorage) {
    receiptStorage = [[NSMutableArray alloc] init];
}

NSMutableDictionary *dict = [NSMutableDictionary dictionary];
[dict setObject:transaction.transactionIdentifier forKey:@"transactionIdentifier"];
[dict setObject:transaction.transactionDate forKey:@"transactionDate"];
[dict setObject:transaction.transactionReceipt forKey:@"transactionReceipt"];

// Write
[receiptStorage addObject:dict];
[receiptStorage writeToFile:receiptStorageFile atomically:YES];
[receiptStorage release];


// READING

// Get app documents directory
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);            
NSString *documentsDirectory = [paths objectAtIndex:0];            
NSLog(@"DocumentsDirectory = %@", documentsDirectory);

// Load from documents directory            
NSArray *receipts = [[[NSArray alloc] initWithContentsOfFile:[documentsDirectory stringByAppendingPathComponent:@"receipts.plist"]] autorelease];
// Found a receipt on disk
if ([receipts count]>0) {
    // Do something, read the dictionary, etc.
} // end if