I am currently sending some simple json from an iOS app to server using the following:
NSData *jsonData = [@"{ \"item\": \"hat\" }" dataUsingEncoding:NSUTF8StringEncoding];
I would like to add a bunch of other fields and values.
What would be the appropriate syntax to include more fields?
Something like
NSData *jsonData = [@"{ \"item\": \"hat\",\"id\":2,\"color\":\"blue\" }" dataUsingEncoding:NSUTF8StringEncoding];
Or is there a better way to do this such by sending a dictionary?
Creating the Dictionary:
NSMutableDictionary *dic = [[NSMutableDictionary alloc] init];
[dic setObject:'Value' forKey:'Key']; //adding values
You can use JSONKit
convert NSDictionary to Json string like so:
NSString *jsonString = [dictionary JSONStringWithOptions:JKSerializeOptionNone error:nil];
or you can use SBJson
NSString *jsonString = [dictionary JSONRepresentation];
and you can do it without third party framework:
NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dictionaryOrArrayToOutput
options:NSJSONWritingPrettyPrinted // Pass 0 if you don't care about the readability of the generated string
error:&error];
if (! jsonData) {
NSLog(@"Got an error: %@", error);
} else {
NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
}
first create an NSDictionary containing the required fields and the serialize it to JSON :
NSDictionary *package = @{@"item":@"hat",@"id":2,@"color":@"blue"};
NSData *data = [NSJSONSerialization dataWithJSONObject:package
options:0 error:&error];
NSDictionarywith the values you want. Then convert the dictionary to a JSON string to send to the server?