解析json后的空值

Question

恢复购买后，我的应用程序将收据发送到服to dictionary添加了两个额外的键：“bundleId”（app bundle id），“UUID”（app identifierForVendor）。批准并首次运行后，应用程序一切正常（恢复后我获得所有密钥）。当用户删除应用程序并重新安装时，这些键的值为空值。

获取当前appStoreReceipt：

   if(!self.receiptData){

    NSURL *receiptURL = [[NSBundle mainBundle]
                         appStoreReceiptURL];
self.receiptData = [NSData
            dataWithContentsOfURL:receiptURL] 
receipt = [self.receiptData bkrBase64EncodedString];
    }
    else{
        receipt = [self.receiptData bkrBase64EncodedString];
    }

Apple要求：

if(receipt){
    NSError *error;
    NSDictionary *requestContents = @{
                                      @"receipt-data" : receipt,
                                      @"password" : //purchaseAppSecreatKey
                                      };
    NSData *requestData = [NSJSONSerialization dataWithJSONObject:requestContents
                                                          options:0
                                                            error:&error];

    if (!requestData) { /* ... Handle error ... */
    }
    // Create a POST request with the receipt data.
    NSURL *storeURL = ///iTunesVerificationURL

    NSMutableURLRequest *storeRequest =
    [NSMutableURLRequest requestWithURL:storeURL];
    [storeRequest setHTTPMethod:@"POST"];
    [storeRequest setHTTPBody:requestData];

    // Make a connection to the iTunes Store on a background queue.
    NSOperationQueue *operationQueue = [[NSOperationQueue alloc] init];
    [NSURLConnection
     sendAsynchronousRequest:storeRequest
     queue:operationQueue
     completionHandler:^(NSURLResponse *response, NSData *data,
                         NSError *connectionError) {

         if (connectionError) {
         NSLog(@"response error %@", connectionError.localizedDescription);

         } else {

             NSError *error;
             NSDictionary *jsonResponse =
             [NSJSONSerialization JSONObjectWithData:data
                                              options:0
                                                error:&error] ;

             if(!error){
                //success, sending to server
             }else{
                 NSLog(@"parse error %@", error.localizedDescription);
             }
         }
     }];
}

发送到服务器代码

NSMutableDictionary *requestBodyDictonary = [NSMutableDictionary dictionaryWithDictionary:reciptDic];
[requestBodyDictonary setObject:[self bundleId] forKey:@"bundleId"];
[requestBodyDictonary setObject:[self UUID] forKey:@"uuid"];

NSURL *url = [NSURL URLWithString:];
NSError *error = nil;
NSData *bodyData = [NSJSONSerialization dataWithJSONObject:requestBodyDictonary options:0 error:&error];

if(error == nil){
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc]
                                    initWithURL:url
                                    cachePolicy:NSURLRequestUseProtocolCachePolicy
                                    timeoutInterval:15.0];

    [request setHTTPMethod:@"POST"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];


    [request setHTTPBody:bodyData];

    NSURLSession *defaultstSession = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];

    NSURLSessionDataTask *task = [defaultstSession dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        NSLog(@"complete %ld", (long)[(NSHTTPURLResponse *)response statusCode]);
    }];

    [task resume];

}else{

    NSLog(@"error parshe %@", [error localizedDescription]);
}

获取uuid和bundleid

   #pragma mark - User ID
-(NSString *)UUID{

    if(!_UUID){
        _UUID = [[NSUserDefaults standardUserDefaults] stringForKey:@"identifierForVendor_UUID"];
        if(!_UUID){
            _UUID = [[[UIDevice currentDevice] identifierForVendor] UUIDString];
            [[NSUserDefaults standardUserDefaults]setObject:_UUID forKey:@"identifierForVendor_UUID"];
            [[NSUserDefaults standardUserDefaults]synchronize];
        }
    }

    return _UUID;
}

#pragma mark bundle id
-(NSString *)bundleId{

    if(!_bundleId){
        _bundleId = [[NSUserDefaults standardUserDefaults] stringForKey:@"app_BundleId"];

        if(!_bundleId){

            _bundleId = [[NSBundle mainBundle]bundleIdentifier];
            if(!_bundleId){
                _bundleId = (__bridge_transfer NSString *)CFDictionaryGetValue(CFBundleGetInfoDictionary(CFBundleGetMainBundle()),
                                                                               (const void *)(@"CFBundleIdentifier"));
            }
            [[NSUserDefaults standardUserDefaults] setObject:_bundleId forKey:@"app_BundleId"];
            [[NSUserDefaults standardUserDefaults] synchronize];
        }
    }

    return _bundleId;
}

为什么我的应用在重新安装后返回null？在沙箱模式下一切都很好

Answer 1

如果您删除APP，那么它也将清除所有NSUserDefault值，我们必须使用keychain来存储值，如果删除app，它将保持相同。

使用KeychainItemWrapper文件来存储UDID和BundleID

从github下载keychanItemwrapper

#import "KeychainItemWrapper.h"

then set values do Like this:

 UIDevice *device = [UIDevice currentDevice];

 NSString *div = [[device identifierForVendor]UUIDString];

 keychain = [[KeychainItemWrapper alloc] initWithIdentifier:@"TestUDID" accessGroup:nil];

 userDevice_id = [keychain objectForKey:(__bridge id)(kSecAttrAccount)];

    if([userDevice_id isEqualToString:@""])

    {

keychain = [[KeychainItemWrapper alloc] initWithIdentifier:@"TestUDID" accessGroup:nil];

        [keychain setObject:div forKey:(__bridge id)(kSecAttrAccount)];

}

从变量中获取值：

 keychain = [[KeychainItemWrapper alloc] initWithIdentifier:@"TestUDID" accessGroup:nil];

        userDevice_id = [keychain objectForKey:(__bridge id)(kSecAttrAccount)];