Need Help populating array with JSON data using SwiftyJSON


Need Help populating array with JSON data using SwiftyJSON



I want to populate an array I have with JSON data. I'm using SwiftyJSON and Alamofire. I'm new to parsing JSON, so i apologize for any ignorance on my end. The URL below is the url i'm inserting in getAllTimeAverage(). Any help would be awesome!! thanks!



This is the JSON Data
https://apiv2.bitcoinaverage.com/indices/global/history/BTCILS?period=alltime&format=json



This is the array i want to populate


var allTimeAverages: [Any] =



These are my functions. I call them in my cellForRowAt:, when i print the allTimeAverages.count, I get back zero.


func getAllTimeAverage(url: String) {
Alamofire.request(url, method: .get)
.responseJSON { response in
if response.result.isSuccess {

print("Sucess! Got the Bitcoin Data")
let bitcointJSON : JSON = [JSON(response.result.value!)]

self.updateAverageAllTime(json: bitcointJSON)

} else {
print("Error: (String(describing: response.result.error))")
self.price = "Connection Issues"
}
}
}
func updateAverageAllTime(json: JSON) {
if let allTimeAverage = json["average"].dictionaryObject {
self.allTimeAverages.append(allTimeAverage)
}
}


func getBitcoinData(url: String) {
Alamofire.request(url, method: .get)
.responseJSON { response in
if response.result.isSuccess {

print("Sucess! Got the Bitcoin Data")
let bitcointJSON : JSON = JSON(response.result.value!)

self.updateBitcoinData(json: bitcointJSON)

} else {
print("Error: (String(describing: response.result.error))")
self.price = "Connection Issues"
}
}



}





Why are you using json["average"].dictionaryObject. do you want to fetch all values of average
– Nasir
Jun 29 at 23:49


average





I want to fetch all the values. @nasir
– Adrian Navarro
Jun 29 at 23:53




1 Answer
1



Here is an example of how this is to be done (I have taken a few values from the JSON API you have shared):


let jsonString = "[{"high": 23043.41,"open": 21494.60,"low": 21338.34,"average": 21668.01,"time": "2018-06-29 00:00:00","volume": 102148.30132998565},{"high": 22488.75,"open": 22405.51,"low": 21380.97,"average": 22241.29,"time": "2018-06-28 00:00:00","volume": 69383.44795111718},{"high": 22491.85,"open": 22169.36,"low": 21940.47,"average": 22224.29,"time": "2018-06-27 00:00:00","volume": 69884.07809550199},{"high": 22707.46,"open": 22635.32,"low": 22004.29,"average": 22480.86,"time": "2018-06-26 00:00:00","volume": 71611.8914173987}]";

if let jsonData = jsonString.data(using: .utf8, allowLossyConversion: false) {
let json = JSON(data: jsonData)
let jsonArray = json.arrayValue

let averagesArray = jsonArray.map{ $0["average"].doubleValue}
let highArray = jsonArray.map{ $0["high"].doubleValue}
let lowArray = jsonArray.map{ $0["low"].doubleValue}
let volumeArray = jsonArray.map{ $0["volume"].doubleValue}
let openArray = jsonArray.map{ $0["open"].doubleValue}

}



Making your solution work according to the above:
In the following line, remove as you are already getting an array from the API.


let bitcoinJSON : JSON = [JSON(response.result.value!)]



so the above line will become


let bitcoinJSON : JSON = JSON(response.result.value!)



Now, you can get the array value like I have done:


let jsonArray = bitcoinJSON.arrayValue



and now you can utilize the rest of the code (repeated below):


let averagesArray = jsonArray.map{ $0["average"].doubleValue}
let highArray = jsonArray.map{ $0["high"].doubleValue}
let lowArray = jsonArray.map{ $0["low"].doubleValue}
let volumeArray = jsonArray.map{ $0["volume"].doubleValue}
let openArray = jsonArray.map{ $0["open"].doubleValue}





getting this error : Value of tuple type '(String, JSON)' has no member 'subscript'
– Adrian Navarro
Jun 30 at 0:03





I have edited the answer
– Nasir
Jun 30 at 0:06





i feel like i'm putting the constant is the wrong place. I'm not getting anything
– Adrian Navarro
Jun 30 at 0:14





Check my edited answer
– Nasir
2 days ago





Can you please upvote the answer (and/or select the answer) if it worked for you
– Nasir
yesterday






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