Converting NSString to NSDictionary JSON

Question

I have the following data saved as an NSString            Key   ID      Value                     Content   268          Type   Text                      Key   ContractTemplateId      Value                     Content   65          Type   Text              I want to convert this data to an NSDictionary containing the key value pairs   I am trying first to convert the NSString to a JSON objects as follows     NSData  data    string dataUsingEncoding NSUTF8StringEncoding   id json    NSJSONSerialization JSONObjectWithData data options 0 error nil     However when I try    NSString   test    json objectForKey   ID    NSLog   TEST IS      test     I receive the value as NULL    Can anyone suggest what is the problem

User · Answer

I think you get the array from response so you have to assign response to array.

NSError *err = nil;
NSArray *array = [NSJSONSerialization JSONObjectWithData:[string dataUsingEncoding:NSUTF8StringEncoding] options:NSJSONReadingMutableContainers error:&err];
NSDictionary *dictionary = [array objectAtIndex:0];
NSString *test = [dictionary objectForKey:@"ID"];
NSLog(@"Test is %@",test);

User · Answer

Use this code where str is your JSON string   NSError  err   nil  NSArray  arr      NSJSONSerialization JSONObjectWithData  str dataUsingEncoding NSUTF8StringEncoding                                    options NSJSONReadingMutableContainers                                     error  amp err      access the dictionaries NSMutableDictionary  dict   arr 0   for  NSMutableDictionary  dictionary in arr         do something using dictionary

User · Answer

Swift 3   if let jsonString   styleDictionary as  String       let objectData   jsonString data using  String Encoding utf8      do           let json   try JSONSerialization jsonObject with  objectData   options  JSONSerialization ReadingOptions mutableContainers           print String describing  json           catch              Handle error         print error

User · Answer

Use the following code to get the response object from the AFHTTPSessionManager failure block  then you can convert the generic type into the required data type   id responseObject    NSJSONSerialization JSONObjectWithData  NSData   error userInfo AFNetworkingOperationFailingURLResponseDataErrorKey  options 0 error nil

User · Answer

I believe you are misinterpreting the JSON format for key values  You should store your string as   NSString  jsonString        ID      Content   268   type     text      ContractTemplateID      Content   65   type     text       NSData  data    jsonString dataUsingEncoding NSUTF8StringEncoding   id json    NSJSONSerialization JSONObjectWithData data options 0 error nil     Now if you do following NSLog statement   NSLog        json objectForKey   ID       Result would be another NSDictionary         Content   268      type   text      Hope this helps to get clear understanding

[objective-c] Converting NSString to NSDictionary / JSON

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