parsing json into an array in swift 3 - ios

Question

I am new on swift and I am getting a json back from a request but I can not parse. I am trying to get the json info and create coordinates to use on mapkit with annotations as well
Below is the json I get back
{
coord = [
{
islocationactive = 1;
latitude = "37.8037522";
locationid = 1;
locationsubtitle = Danville;
locationtitle = "Schreiner's Home";
longitude = "121.9871216";
},
{
islocationactive = 1;
latitude = "37.8191921";
locationid = 2;
locationsubtitle = "Elementary School";
locationtitle = Montair;
longitude = "-122.0071005";
},
{
islocationactive = 1;
latitude = "37.8186077";
locationid = 3;
locationsubtitle = "Americas Eats";
locationtitle = "Chaus Restaurant";
longitude = "-121.999046";
},
{
islocationactive = 1;
latitude = "37.7789669";
locationid = 4;
locationsubtitle = "Cheer & Dance";
locationtitle = Valley;
longitude = "-121.9829908";
}
] }
and my code to try to parse is this
let task = URLSession.shared.dataTask(with: request as URLRequest){
data, response, error in
//exiting if there is some error
if error != nil{
print("error is \(error)")
return;
}
//parsing the response
do {
//converting resonse to NSDictionary
var teamJSON: NSDictionary!
teamJSON = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary
print(teamJSON)
//getting the JSON array teams from the response
let liquidLocations: NSArray = teamJSON["coord"] as! NSArray
//looping through all the json objects in the array teams
for i in 0 ..< liquidLocations.count{
//getting the data at each index
// let teamId:Int = liquidLocations[i]["locationid"] as! Int!
}
} catch {
print(error)
}
}
//executing the task
task.resume()
but not that I try works. I want to get the latitude, longitude and create an annotationn on the map
Thanks for the help

Answer 1

You can try with below code its same as #Niko Adrianus Yuwono but made some changes so you will get teamid as integer
do {
let data : NSData = NSData() // change your data variable as you get from webservice response
guard let teamJSON = try NSJSONSerialization.JSONObjectWithData(data, options: []) as? [String: Any],
let liquidLocations = teamJSON["coord"] as? [[String: Any]]
else { return }
//looping through all the json objects in the array teams
for i in 0 ..< liquidLocations.count{
let teamId: Int = (liquidLocations[i]["locationid"] as! NSString).integerValue
print(teamId)
}
} catch {
print(error)
}

Answer 2

Try this
do {
guard let teamJSON = try JSONSerialization.jsonObject(with: data!, options: []) as? [String: Any],
let liquidLocations = teamJSON["coord"] as? [[String: Any]]
else { return }
//looping through all the json objects in the array teams
for i in 0 ..< liquidLocations.count{
let teamId: Int = (liquidLocations[i]["locationid"] as! NSString).integerValue
}
} catch {
print(error)
}
The key is not to use NSDictionary and NSArray because it's not strongly-typed (Although you can make it strongly-typed too) use Swift's array and Dictionary where you can use [Element Type] for array and [Key: Value] for dictionary