How to achieve this format in swift? - swift

Question

I want to pass a parameter in my POST method. This is the valid parameter to be sent.
{
"feedback" : "Sample Feedback",
"orderId" : 1240,
"ratings" : [
{
"rateType" : 1,
"rating" : 3
},
{
"rateType" : 2,
"rating": 4
}
],
"sellerId" : 598,
"title" : "Sample title"
}
I am using this(below) to achieve that format(above) but the server returns invalid feedback. Please help me if I'm missing something or doing wrong to achieve the format above.
let parameter: [String: AnyObject] = [
"sellerId": self.sellerId,
"orderId": self.orderId,
"title": "Seller Feedback",
"feedback": "Sample Feedback",
"ratings": [[
"rateType": 1,
"rating": self.rate1
], [
"rateType": 2,
"rating": self.rate2
]]
]
Thank you!

Answer 1

Dictionaries are not ordered. you'll have to implement your own ordered dictionary or use a struct. here is one from http://timekl.com/blog/2014/06/02/learning-swift-ordered-dictionaries/
struct OrderedDictionary<Tk: Hashable, Tv> {
/* ... vars and init ... */
subscript(key: Tk) -> Tv? {
get {
return self.values[key]
}
set(newValue) {
if newValue == nil {
self.values.removeValueForKey(key)
self.keys.filter {$0 != key}
return
}
let oldValue = self.values.updateValue(newValue!, forKey: key)
if oldValue == nil {
self.keys.append(key)
}
}
}
}