在 IOS 中为 Json 创建 NSdictionary 时应用程序崩溃

Question

我正在开发应用购买应用，我想在该应用中与我的开发者服务器验证购买交易收据以及其他信息，例如设备供应商 ID、软件版本、设备名称和希望购买的产品 ID。

我正在使用 NSDictionary 创建 Json，但是当我尝试添加时它崩溃了

 NSMutableArray *MainOBJ = [NSMutableArray arrayWithObjects:IDdict,deviceData,kMyFeatureIdentifier,jsonObjectString,nil]; 

其中 IDdict 是设备 id 字符串，deviceData 是字典，其中内容设备信息如名称、软件版本和 kMyFeatureIdentifier 是产品 id NSstring 希望购买。 jsonObjectString 是编码的交易回执字符串。

这是我的代码

- (void)verifyReceipt:(SKPaymentTransaction *)transaction {
 
 //TODO
 // currently working on JSON to send to server .
   NSLog(@"In verifyReceipt method");

   jsonObjectString = [self encode:(uint8_t*)transaction.transactionReceipt.bytes length:transaction.transactionReceipt.length];
 // jsonObjectString=@"TESTING";

NSLog(@"Json Object encoded receipt is %@",jsonObjectString);

NSString *IDdict = [[NSString alloc ]initWithString:[UIDevice currentDevice].identifierForVendor.UUIDString]; // Device UDID

NSArray *objects = [NSArray arrayWithObjects:@"NULL",[[UIDevice currentDevice] model],[[UIDevice currentDevice] name],nil];
NSArray *keys = [NSArray arrayWithObjects:@"serial",@"constructor",@"name",nil];
NSDictionary *deviceData = [NSDictionary dictionaryWithObjects:objects forKeys:keys];  // Device information like name , device model , serial number

NSLog(@"Json question dict created");


//TODO: **It crash here**

NSMutableArray *MainOBJ = [NSMutableArray arrayWithObjects:IDdict,deviceData,kMyFeatureIdentifier,jsonObjectString,nil]; // purchased Item ID of previous item
NSMutableArray *MainKeys = [NSMutableArray arrayWithObjects:@"ID",@"device",@"video","@receiptData", nil];
NSMutableDictionary *MainDict = [NSMutableDictionary dictionaryWithObjects:MainOBJ forKeys:MainKeys]; // final string of data

NSLog(@"Json Main dict created");


NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:MainDict options:NSJSONWritingPrettyPrinted error:&error];
NSString *resultAsString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
NSLog(@"Purchase product Json string:\n%@", resultAsString);


ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:[[NSURL alloc] initWithString:@"http://xyz/dev.php/video/verifyReceipt"]];
[request setPostValue:resultAsString forKey:@"verify"];
[request setDidFinishSelector:@selector(requestDone:)];
[request setTimeOutSeconds:120];
[request setDelegate:self];
[request setNumberOfTimesToRetryOnTimeout:2];
[request setDownloadProgressDelegate:self];
request.showAccurateProgress = YES;

我得到了 "NSLog(@"Json question dict created");"崩溃后在我的日志中。 而我预期的json格式是这样的

        {
      "ID" : "E6E95901-006B-4569-8D2B-FA29A0307F80",
     "device" : {
     "name" : "iPad Simulator",
     "constructor" : "iPad Simulator",
     "serial" : "NULL"
       },
     "video" : "com.amm.happyclip.4445Video",
     "receiptData":"DSKLFKSGERPOKFLJGMZEKLEMSERLKEMZTRKGDGFLefklezkgem"
       }

错误截图

任何建议，感谢您的帮助，谢谢

返回字符串的编码方法，我只是将该字符串分配给“jsonObjectString”

- (NSString *)encode:(const uint8_t *)input length:(NSInteger)length {

static char table[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

NSMutableData *data = [NSMutableData dataWithLength:((length + 2) / 3) * 4];
uint8_t *output = (uint8_t *)data.mutableBytes;

for (NSInteger i = 0; i < length; i += 3) {
    NSInteger value = 0;
    for (NSInteger j = i; j < (i + 3); j++) {
        value <<= 8;
        
        if (j < length) {
            value |= (0xFF & input[j]);
        }
    }
    
    NSInteger index = (i / 3) * 4;
    output[index + 0] =                    table[(value >> 18) & 0x3F];
    output[index + 1] =                    table[(value >> 12) & 0x3F];
    output[index + 2] = (i + 1) < length ? table[(value >> 6)  & 0x3F] : '=';
    output[index + 3] = (i + 2) < length ? table[(value >> 0)  & 0x3F] : '=';
       
}

return [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
}

Answer 1

也许 MainOBJ 中的每个对象都是 nil，如果您使用 nil 对象创建字典，它会使您的应用程序崩溃，或者它们已经被释放。

尝试从 MainOBJ 数组中记录对象。