How to Display data from JSON in Alphabetical Sections Swift? - json

Question

I've been using JSONParsing to display my data when you search for a term. Now I want to list out all of those terms in an alphabetized list. But am having trouble getting the code to work correctly. I've replicated some code from someone else that was having the same problem and got that to work but I'm having trouble implementing my own code.
I currently am parsing my JSON with this code:
func parseJSONSignDictionary() {
if let url = Bundle.main.url(forResource: "csvjson", withExtension: "json") {
do {
let date = Date()
let data = try Data(contentsOf: url)
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? [String:Any] {
(json["results"] as? [[String:Any]])?.forEach { j in
if let name = j["identifier"] as? String, let id = j["id"] as? Int {
let sign = Signs(name: name, number: id)
signsArray.append(sign)
}
}
}
print("Took", Date().timeIntervalSince(date))
} catch {
print(error.localizedDescription)
}
}
}
Edit to add some more code, this is my Signs class, which would replace the Restaurant Array/Class:
class Signs: NSObject, Decodable, NSCoding {
private var _signName: String!
private var _signNumber: Int!
var signName: String {
return _signName
}
var signNumber: Int {
return _signNumber
}
func encode(with aCoder: NSCoder) {
aCoder.encode(signName, forKey: "signNameKey")
}
required init?(coder aDecoder: NSCoder) {
print("Trying to turn Data into Sign")
self._signName = aDecoder.decodeObject(forKey: "signNameKey") as? String
}
init(name: String, number: Int) {
self._signName = name
self._signNumber = number
}
}
The code from another StackOverflow that I'm trying to use is from here. question:Display data from JSON in alphabetical sections in Table View in Swift
func makeDataSource(names:[String:[AnyObject]]) {
var dict = [String:[Restaurant]]()
let letters = NSCharacterSet.letters
for (_,value) in names {
//Iterating Restaurants
for resObj in value {
if let restaurantName = resObj["name"] as? String {
let restaurant = Restaurant(name: restaurantName)
var key = String(describing: restaurant.name.first!)
//To check whether key is alphabet or not
key = isKeyCharacter(key: key, letters: letters) ? key : "#"
if let keyValue = dict[key] {
//Already value exists for that key
var filtered = keyValue
filtered.append(restaurant)
//Sorting of restaurant names alphabetically
//filtered = filtered.sorted(by: {$0.0.name < $0.1.name})
dict[key] = filtered
} else {
let filtered = [restaurant]
dict[key] = filtered
}
}
}
}
//To sort the key header values
self.dataArray = Array(dict).sorted(by: { $0.0 < $1.0 })
//Logic to just shift the # category to bottom
let temp = self.dataArray[0]
self.dataArray.removeFirst()
self.dataArray.append(temp)
self.indexTitles = Array(dict.keys.sorted(by: <))
let tempIndex = self.indexTitles[0]
self.indexTitles.removeFirst()
self.indexTitles.append(tempIndex)
}
I have my own array that would replace Restaurant, called Signs.
if let restaurantName = resObj["name"] as? String {
I'm also wondering where this "name" is being pulled from? Is it the array/model which has the var name?
I'm not sure since I have a way to access the JSON data with my own function if I even need to try to use the getdata() function.
I just wanna understand what I'm missing, and how to do it on my own to get the code to work properly.