How to make an array of string (String has json data) - ios

Question

I Want to make a string like below
contentlist=["{\"id\":\"id1\"}"]
How can i achieve this ?
I tried with NSString method stringWithFormat:#"contentlist=[\"%#\"]
but it has \ character when you copy that string and paste it into textedit or in stickies or anywhere.
if you print this line that it will display like contentlist=["{"id":"id1"}] that i dont want.
Edited :
Here is my code..
NSString *stringUrl = <MY SERVER URL STRING>
NSString *param = [NSString stringWithFormat:#"contentlist=[%c%#%c]",34,header,34];
NSData *postData = [param dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:#"%lu",(unsigned long)[postData length]];
NSError *error;
NSMutableURLRequest *req = [[AFJSONRequestSerializer serializer] requestWithMethod:#"POST" URLString:stringUrl parameters:nil error:&error];
req.timeoutInterval= 40.0;
[req setValue:#"application/json" forHTTPHeaderField:#"Accept"];
[req setValue:postLength forHTTPHeaderField:#"Content-Length"];
[req setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
[req setHTTPBody:postData];
And my header value is..
{\"id\":\"21ca7309\",\"indexVersion\":0,\"modified\":1501694202014,\"created\":1501691797232,\"modifiedBy\":\"42bebd87be6ddd4a\",\"name\":\"abcd\"}
How my param value look like in debug mode..
#"contentlist=[\"{\"id\":\"21ca7309\",\"indexVersion\":0,\"modified\":1501694202014,\"created\":1501691797232,\"modifiedBy\":\"42bebd87be6ddd4a\",\"name\":\"abcd\"}\"]
And how I need to pass is like :
contentlist:["{\"id\":\"21ca7309\",\"indexVersion\":0,\"modified\":1501694202014,\"created\":1501691797232,\"modifiedBy\":\"42bebd87be6ddd4a\",\"name\":\"abcd\"}"]

Answer 1

You don't required to use stringWithFormat
as you mentioned you have NSData of JSON if you don't have that then convert it using
NSError *error;
NSData *data = [NSJSONSerialization dataWithJSONObject:yourJSONO options:NSJSONWritingPrettyPrinted error:&error];
Don't forgot to check error before use :)
you can easily get string from that with below code
NSString *str = [[NSstring alloc] initWithData:data encoding:NSUTF8StringEncoding]