How to sort JSON in swift based on persian characters

i am new to swift , i going to sort a json file in bundle not by code , is there anyway to sort the file using by code or not , i want to sort it from "citname":"لومار"

the json file is :

{


"data":[
{
"_id":1,
"citproidint":4,
"citname":"لومار"
},
{
"_id":2,
"citproidint":4,
"citname":"ايوان"
},
{
"_id":3,
"citproidint":12,
"citname":"آبعلی"
},
{
"_id":4,
"citproidint":25,
"citname":"نيشابور"
},
{
"_id":5,
"citproidint":27,
"citname":"سقز"
},

]

}


... // 827 id is in this json file
and for every block in this json file i parse like this , and everything is fine but i want to use it sorted in my pickerview then i need to save sorted modals

guard let path = Bundle.main.path(forResource: "citybig", ofType: "json") else { return }
// city Text file:// ...
let url = URL(fileURLWithPath: path)
do {
// data explained in bytes
let data = try Data(contentsOf: url)
// we get the json file text
let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers)
// put json in nsdictinary so we can access each index and person sooo ... id and more

for (key,value) in json as! NSDictionary {
if (key as! String) == "data" {
let value2 = value.s
for each in value as! [[String: Any]] {
let singleCityModal = cityModal()
for (key,value) in each {
switch key {
case "_id" :
singleCityModal.id = value as? Int
case "citproidint" :
singleCityModal.citproidint = value as? Int
case "citname" :
singleCityModal.citname = value as? String
default:
break
}
}
cityFirstModal.append(singleCityModal)
}

cityFinalModal.append(contentsOf: cityFirstModal)


NSDictionary

1 Answer
1

Your way to parse the data is quite strange, in Swift 4 there is a more convenient way, the Decodable protocol.

Decodable

You need two structs:

struct CityData : Decodable {
private enum CodingKeys: String, CodingKey { case cities = "data"}

let cities : [City]
}

struct City : Decodable {
private enum CodingKeys: String, CodingKey { case id = "_id", citproidint, name = "citname"}

let id, citproidint: Int
let name : String
}


and the code to parse the JSON becomes a bit shorter (and more efficient)

let url = Bundle.main.url(forResource: "citybig", withExtension: "json")!
let data = try! Data(contentsOf: url)
let cityData = try! JSONDecoder().decode(CityData.self, from: data)


The exclamation marks are intended. As the (immutable) file is in the bundle the code must not crash. If it does you made a design mistake.

It's just one additional line to sort the cities by citproidint

citproidint

let sortedCities = cityData.cities.sorted(by: {$0.citproidint < $1.citproidint})


I'm not familiar with Farsi but if you want to sort by name the selector localizedStandardCompare might do the job

name

localizedStandardCompare

let sortedCities = cityData.cities.sorted(by: {$0.name.localizedStandardCompare($1.name) == .orderedAscending })


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