JSON响应在iPhone中显示为nil

Question

I am getting a response from a webservice. Yesterday I started getting nil JSON, but from response I am have proper byte data.

Here is my code:

NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:byteData options:   NSJSONReadingMutableContainers error:&error];
NSLog(@"jsonDict %@",jsonDict);

byteData is not nil, but jsonDict is nil. My code is not working suddenly. Here the response that I am getting from the service :

{"DecryptDocAndCreatePDFResult":"abcdhdsgs"}

Please help me, Thanks.

Answer 1

First off all before convert to the json. check the NSString O/p

 NSString *strResponce=[[NSString alloc]initWithData: byteData encoding:NSUTF8StringEncoding];
NSLog(@"%@",strResponce);

Answer 2

first check that your JSON is comes or not

NSString *tmp=[[NSString alloc]initWithData:byteData encoding:NSUTF8StringEncoding];

NSLog(@"before %@", tmp);


after that start your 

NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:byteData options:   NSJSONReadingMutableContainers error:&error];    //  try this NSJSONReadingMutableContainers into NSJSONReadingAllowFragments
NSLog(@"jsonDict %@",jsonDict);

the some type of NSJSONReadingOptions is

typedef NS_OPTIONS(NSUInteger, NSJSONReadingOptions) {
NSJSONReadingMutableContainers = (1UL << 0),
NSJSONReadingMutableLeaves = (1UL << 1),
NSJSONReadingAllowFragments = (1UL << 2)
KNilOptions //  I added here 
};