How to decode JSON in swift - json

Question

{
"Meta Data": {
"1. Information": "Daily Prices (open, high, low, close) and Volumes",
"2. Symbol": "FB",
"3. Last Refreshed": "2017-08-23 16:00:00",
"4. Output Size": "Compact",
"5. Time Zone": "US/Eastern"
},
"Time Series (Daily)": {
"2017-08-23 16:00:00": {
"1. open": "168.8400",
"2. high": "169.3600",
"3. low": "168.2000",
"4. close": "168.7100",
"5. volume": "8198515"
},
"2017-08-22": {
"1. open": "168.2800",
"2. high": "169.8700",
"3. low": "167.1500",
"4. close": "169.6400",
"5. volume": "11333260"
},
"2017-08-21": {
"1. open": "167.1600",
"2. high": "168.0000",
"3. low": "165.8200",
"4. close": "167.7800",
"5. volume": "11880823"
},
"2017-08-18": {
"1. open": "166.8400",
"2. high": "168.6700",
"3. low": "166.2100",
"4. close": "167.4100",
"5. volume": "14933261"
},
"2017-08-17": {
"1. open": "169.3400",
"2. high": "169.8600",
"3. low": "166.8500",
"4. close": "166.9100",
"5. volume": "16791591"
},
"2017-08-16": {
"1. open": "171.2500",
"2. high": "171.3800",
"3. low": "169.2400",
"4. close": "170.0000",
"5. volume": "15580549"
}
}
}
My problem is how can I get all the information (ex: 4.close) from the JSON date if the days (ex: 2017-08-02) are constantly changing.
So far in my project I can only get a data of a certain date.
func fetchStockDataCalendar() {
let url = URL(string: "https://www.alphavantage.co/query?function=TIME_SERIES_DAILY&symbol=\(symbol)&apikey=\(apiKey)")
let task = URLSession.shared.dataTask(with: url!) { (data, response, error) in
if error != nil {
print ("ERROR")
} else {
if let content = data {
do {
//Array
let myJson = try JSONSerialization.jsonObject(with: content, options: JSONSerialization.ReadingOptions.mutableContainers) as AnyObject
if let Time = myJson["Time Series (Daily)"] as? NSDictionary {
if let Day = Time["2017-06-21"] as? NSDictionary {
if let CloseStockData = Day["4. close"] as? String {
print("2017-06-21 CloseStock-> \(CloseStockData)$")
}
}
}
} catch {
print(error.localizedDescription)
}
}
}
}
task.resume()
}

Answer 1

Here is your func with the above code but as an NSDictionary. My console is showing all of the closes.
2017-10-24 CloseStock-> 256.5600
2018-02-22 CloseStock-> 270.4000
func fetchStockDataCalendar() {
let url = URL(string: "https://www.alphavantage.co/query?function=TIME_SERIES_DAILY&symbol=\("SPY")&apikey=\(alphaApiKey)")
let task = URLSession.shared.dataTask(with: url!) { (data, response, error) in
if error != nil {
print ("ERROR")
} else {
if let content = data {
do {
let myJson = try JSONSerialization.jsonObject(with: content, options: JSONSerialization.ReadingOptions.mutableContainers) as AnyObject
if let time = myJson["Time Series (Daily)"] as? NSDictionary {
for (key, value) in time {
if let value = value as? Dictionary<String, String> {
if let close = value["4. close"] {
print("\(key) CloseStock-> \(close)")
}
}
}
}
} catch {
print(error.localizedDescription)
}
}
}
}
task.resume()
}

Answer 2

Use a for loop to iterate over the dictionary keys and values like this:
if let time = myJson["Time Series (Daily)"] {
for (key, value) in time {
if let close = value["4. close"] {
print("\(key) CloseStock-> \(close)")
}
}
}
Based on your comments I've added this too
if let time = myJson["Time Series (Daily)"] {
for (key, value) in time {
if let value = value as? Dictionary<String, String> {
if let close = value["close"] {
print("\(key) CloseStock-> \(close)")
}
}
}
}