nested dictionaries converted to json swift - json

Question

I Have a Dictionary of Dictionaries that I need to convert to Json.
[
Dict1:1,
test: A Value,
NestedDict1:[
city: A City Name,
address: An Address,
NestedDict2: [
1: 1,
39: 2
],
favorite1: 2,
favorite3: Chocolate
]
]
When I use the
NSJSONSerialization.dataWithJSONObject(myJsonDict, options: NSJSONWritingOptions.PrettyPrinted, error: nil)
it only encodes the outer most dictionary. So my output looks something like this:
{
"Dict1":"1",
"test": "A Value",
"NestedDict1":"[
city: A City Name,
address: An Address,
NestedDict2: [
1: 1,
39: 2
],
favorite1: 2,
favorite3: Chocolate
]"
}
How do I JSON the inner dictionaries as well?

Answer 1

Swift 3
let myJsonDict : [String: Any] = [
"Dict1": "1",
"test": "A Value",
"NestedDict1":[
"city": "A City Name",
"address": "An Address",
"NestedDict2": [
"1": "1",
"39": "2"
],
"favorite1": "2",
"favorite3": "Chocolate"
]
]
let jsonObject = try? JSONSerialization.data(withJSONObject: myJsonDict, options: [])
if let jsonString = String(data: jsonObject!, encoding: .utf8) {
print(jsonString)
}
Output
{"test":"A Value","Dict1":"1","NestedDict1":{"favorite1":2,"city":"A
City
Name","NestedDict2":{"1":"1","39":"2"},"favorite3":"Chocolate","address":"An
Address"}}

Answer 2

I think the problem is more with your representation of the data.
If you can get away with changing all the keys to Strings, then it can be a dictionary, since Strings conform to Hashable. Otherwise, it would be defined as Any, and can't really be a Dictionary key.
Doing this allows the following:
let myJsonDict : [String:AnyObject] = [
"value": 1123,
"test": "some string",
"NestedDict1": [
"city": "A City Name",
"address": "An Address",
"NestedDict2": [
"1": 1,
"39": 2
],
"favorite1": 2,
"favorite3": "Chocolate"
]
]
var jsonObject = NSJSONSerialization.dataWithJSONObject(myJsonDict, options: NSJSONWritingOptions.PrettyPrinted, error: nil)
println(NSString(data: jsonObject!, encoding: NSUTF8StringEncoding)!)
which gives the following output:
{
"test" : "some string",
"NestedDict1" : {
"city" : "A City Name",
"address" : "An Address",
"favorite3" : "Chocolate",
"NestedDict2" : {
"1" : 1,
"39" : 2
},
"favorite1" : 2
},
"value" : 1123
}