Check Jsonobject for Int - ios

Question

I have a problem, I get a Json. The data comes in a dictionary.
This is a sample json:
Receivedtext: {
"x": "pricef",
"b": "usd",
"ds": [
"tpr",
"avgp",
"mcap",
"ppc7D",
"ppc12h",
"ppc4h",
"ppc24h"
],
"data": [
[
"ADA/USD",
"0.819",
"21.23B",
"6.09",
"-5.45",
"-5.36",
"-10"
],
[
"AVT/USD",
"5.968",
"35.81M",
"24.33",
"-4.51",
"-3.3",
"6.65"
],
[
"BAT/USD",
"0.946",
"unknown",
null,
null,
null,
null
], [
"FUN/USD",
"0.000",
"0.00",
0,
0,
0,
0
] ]
}
Normally the json should be all String. I can handle the nill/null but I dont know how to handle if its Int/Double.
If it is a Int/Double I want to replace the value with "unknown".
This is my code so far:
struct JsonMaintableWebsocket {
let tpr: String?
let avgp: String?
let mcap: String?
let ppc7D: String?
let ppc12h: String?
let ppc4h: String?
let ppc24h: String?
init(json: [String?]) {
self.tpr = json[0]
self.avgp = json[1]
self.mcap = json[2]
self.ppc7D = json[3]
self.ppc12h = json[4]
self.ppc4h = json[5]
self.ppc24h = json[6]
}
static func fetchJsonWebsocketMaintable(json: Data) -> [JsonMaintableWebsocket] {
var jsonWebsocket: [JsonMaintableWebsocket] = []
do {
let jsonData = try JSONSerialization.jsonObject(with: json, options: []) as? [String: Any?]
if let data = jsonData!["data"] as? [[String?]] {
for d in data {
jsonWebsocket.append(JsonMaintableWebsocket(json: d))
}
}
}
catch let error{
print(error.localizedDescription)
}
return jsonWebsocket
}
}
Thanks a lot!

Answer 1

One way you could handle this would be to map over the array and check to see what kind of value is stored, and act accordingly. You might change this part:
if let data = jsonData!["data"] as? [[String?]] {
for d in data {
jsonWebsocket.append(JsonMaintableWebsocket(json: d))
}
}
to this:
if let data = jsonData!["data"] as? [[Any?]] {
for d in data {
let adjustedArray: [String?] = d.map({
//First, check to see if object is nil, and return nil if so
if $0 == nil {
return nil
//Check to see if value is string, and return string
} else if let stringValue = $0 as? String {
return stringValue
//Otherwise return "unknown"
} else {
return "unknown"
}
})
jsonWebsocket.append(JsonMaintableWebsocket(json: adjustedArray))
}
}
It would also be easy to handle Int or Double as Strings as well, by adding a couple more options:
if let data = jsonData!["data"] as? [[Any?]] {
for d in data {
let adjustedArray: [String?] = d.map({
if $0 == nil {
return nil
} else if let stringValue = $0 as? String {
return stringValue
} else if let intValue = $0 as? Int {
return "\(intValue)"
} else if let doubleValue = $0 as? Double {
return "\(doubleValue)"
} else {
return "unknown"
}
})
jsonWebsocket.append(JsonMaintableWebsocket(json: adjustedArray))
}
}