ios NSMutableDictionary to JSON convertion gives wrong format - ios

Question

I am trying to convert a NSMutableDictionary to json on ios.
NSMutableDictionary *offers = [[NSMutableDictionary alloc] init ];
for(int i=0;i<2;i++) {
NSMutableDictionary *myOffer = [[NSMutableDictionary alloc]init];
[myOffer setObject:#"3" forKey:#"id"];
[myOffer setObject:#"34" forKey:#"price"];
[myOffer setObject:#"3" forKey:#"quantity"];
[offers setObject:myOffer forKey:[NSString stringWithFormat:#"%i",i]];
}
NSError *errorOffers;
NSData *jsonDataOffers = [NSJSONSerialization dataWithJSONObject:offers
options:0
error:&errorOffers];
NSString* aStrOffers;
aStrOffers = [[NSString alloc] initWithData:jsonDataOffers encoding:NSUTF8StringEncoding];
I am getting the result.
"offers": {
"0": {
"id": "3",
"quantity": "3",
"price": "34"
},
"1": {
"id": "3",
"quantity": "3",
"price": "34"
}
}
But I need it as
"offers": {
[ {
"id": "3",
"quantity": "3",
"price": "34"
},
{
"id": "3",
"quantity": "3",
"price": "34"
}
]
}
(no indices , but square bracket ) Please advice.

Answer 1

The example below does exactly what you need. You need an array instead of a dictionary. Because a dictionary has keys that need to be defined.
NSMutableArray *offers = [[NSMutableArray alloc] init];
for(int i=0;i<2;i++) {
NSMutableDictionary *myOffer = [[NSMutableDictionary alloc]init];
[myOffer setObject:#"3" forKey:#"id"];
[myOffer setObject:#"34" forKey:#"price"];
[myOffer setObject:#"3" forKey:#"quantity"];
[offers addObject:myOffer];
}
NSError *errorOffers;
NSData *jsonDataOffers = [NSJSONSerialization dataWithJSONObject:offers
options:0
error:&errorOffers];
NSString* aStrOffers;
aStrOffers = [[NSString alloc] initWithData:jsonDataOffers encoding:NSUTF8StringEncoding];

Answer 2

This code is good for you
{"jsonArray":[{"id":"3","quantity":"3","price":"34"},{"id":"3","quantity":"3","price":"34"}]}
NSMutableDictionary *offers = [[NSMutableDictionary alloc] init ];
NSMutableArray *array = [NSMutableArray array];
for(int i=0;i<2;i++) {
NSMutableDictionary *myOffer = [[NSMutableDictionary alloc]init];
[myOffer setObject:#"3" forKey:#"id"];
[myOffer setObject:#"34" forKey:#"price"];
[myOffer setObject:#"3" forKey:#"quantity"];
[array addObject:myOffer];
}
[offers setObject:array forKey:#"jsonArray"];
NSError *errorOffers;
NSData *jsonDataOffers = [NSJSONSerialization dataWithJSONObject:offers
options:0
error:&errorOffers];
NSString* aStrOffers;
aStrOffers = [[NSString alloc] initWithData:jsonDataOffers encoding:NSUTF8StringEncoding];
NSLog(#"%#",aStrOffers);

Answer 3

NSMutableDictionary *offers = [[NSMutableDictionary alloc] init ];
NSMutableArray *offerDetails = [[NSMutableArray alloc] init];
for(int i=0;i<2;i++) {
NSMutableDictionary *myOffer = [[NSMutableDictionary alloc]init];
[myOffer setObject:#"3" forKey:#"id"];
[myOffer setObject:#"34" forKey:#"price"];
[myOffer setObject:#"3" forKey:#"quantity"];
[offerDetails addObject:myOffer];
}
[offers setObject:offerDetails forKey:#"offers"];
NSError *errorOffers;
NSData *jsonDataOffers = [NSJSONSerialization dataWithJSONObject:offers
options:0
error:&errorOffers];
NSString* aStrOffers;
aStrOffers = [[NSString alloc] initWithData:jsonDataOffers encoding:NSUTF8StringEncoding];
NSLog(#"%#", aStrOffers);

Answer 4

You need to set the data to the NSDictionary first and then make that to the NSMutableArray and use the array for the NSJSonSerialization , then you will get the output as you are Expected.
[.... ] --> Indicates the NSArray objects.
{.....} --> Indicates the NSDictionary objects.