Use Swifty JSON to parse array - ios

Question

This is my json to parse (example):
[
{
"id": 1,
"name": "Team name",
"shower": {
"id": 1,
"status": 1,
"startLocation": {
"id": 1,
"name": "abc 16"
}
}
},
{
"id": 2,
"name": "Team name",
"shower": {
"id": 2,
"status": 1,
"startLocation": {
"id": 1,
"name": "efg 16"
}
}
}
]
paste it this json viewer to view it easily.
as you can see, it is an array (of teams).
I need to get each team and do something with it.
After many attempts, I tried using SwiftyJSON, because I thought it will be easier. But, it did not worked for me.
This is what I tried:
let array = JSON(response)
// print each subJSON in array
for team in array.arrayValue {
print(team)
}
But the loop does not work. It does not go in to the loop at all.
Maybe it does not understand that my json is an array.
I can see the array object in the debugger. It looks like this:
How can I get these sub-JSONs?
Thanks.

Answer 1

I think you should use
let array = JSON(parseJSON: response)
instead of
let array = JSON(response)

Answer 2

SwiftyJSON contains methods to parse JSON string into a JSON object, check documentation
/**
Parses the JSON string into a JSON object
- parameter json: the JSON string
- returns: the created JSON object
*/
public init(parseJSON jsonString: String) {
if let data = jsonString.data(using: .utf8) {
self.init(data)
} else {
self.init(NSNull())
}
}
/**
Creates a JSON from JSON string
- parameter string: Normal json string like '{"a":"b"}'
- returns: The created JSON
*/
#available(*, deprecated: 3.2, message: "Use instead `init(parseJSON: )`")
public static func parse(json: String) -> JSON {
return json.data(using: String.Encoding.utf8)
.flatMap{ JSON(data: $0) } ?? JSON(NSNull())
}
or alternatively you can convert son string into son object like
Swift 3:
let dataFromString = response.data(using: .utf8)
let jsonArray = JSON(data: dataFromString!)

Answer 3

In the following example, I save team names in an array. I've tested it.
var names = [String]()
if let array = json.array {
for i in 0..<array.count {
let name = array[i]["name"]
names.append(name.stringValue)
}
}
print(names) // ["Team name", "Team name"]

Answer 4

Here is the answer for Swift 5. In My case data response is something like below :
[
{
"Name": "Some Type",
"Data": [
{
"ParentId": 111,
"Code": "Personal",
"SortOrder": 1,
"Name": "Personal",
"Id": 323
},
{
"ParentId": null,
"Code": "Work",
"SortOrder": 2,
"Name": "Work",
"Id": 324
}
],
"KeyType": "Integer"
},
{
"Name": "Phone Type",
"Data": [
{
"ParentId": null,
"Code": "Phone",
"SortOrder": 1,
"Name": "Phone",
"Id": 785
},
{
"ParentId": null,
"Code": "Cell",
"SortOrder": 2,
"Name": "Cell",
"Id": 786
},
{
"ParentId": null,
"Code": "Fax",
"SortOrder": 3,
"Name": "Fax",
"Id": 787
},
{
"ParentId": null,
"Code": "Home",
"SortOrder": 4,
"Name": "Home",
"Id": 788
},
{
"ParentId": null,
"Code": "Office",
"SortOrder": 5,
"Name": "Office",
"Id": 789
}
],
"KeyType": "Integer"
}
]
I was handled it with following code.
struct responseObjectClass:BaseModel {
var responsearray: [arrayData]? = nil
init(json: JSON) {
responsearray = json.arrayValue.map { arrayData(json: $0) }
}
}
struct arrayData:BaseModel {
let Name: String?
var DataValue: [DataLookup]? = nil
let KeyType: String?
init(json: JSON) {
Name = json["Name"].stringValue
DataValue = json["Data"].arrayValue.map { DataLookup(json: $0) }
KeyType = json["KeyType"].stringValue
}
}
struct DataLookup:BaseModel {
let ParentId: Any?
let Code: String?
let SortOrder: Int?
let Name: String?
let Id: Int?
init(json: JSON) {
ParentId = json["ParentId"]
Code = json["Code"].stringValue
SortOrder = json["SortOrder"].intValue
Name = json["Name"].stringValue
Id = json["Id"].intValue
}
}
BaseModel is Optional it's just used for init Json.
protocol BaseModel {
init(json: JSON)
}

Answer 5

Without SwiftyJSON
Below is the valid JSON
data.json File
[{
"id": 1,
"name": "Team name",
"shower": {
"id": 1,
"status": 1,
"startLocation": {
"id": 1,
"name": "abc 16"
}
}
}, {
"id": 2,
"name": "Team name",
"shower": {
"id": 2,
"status": 1,
"startLocation": {
"id": 1,
"name": "efg 16"
}
}
}]
Below is the code to read your json.
if let path = Bundle.main.path(forResource: "data", ofType: "json") {
let url = URL(fileURLWithPath: path)
do {
let data = try Data(contentsOf: url)
if let jsonArray = try JSONSerialization.jsonObject(with: data, options: .allowFragments) as? NSArray {
for (_, item) in jsonArray.enumerated() {
let itemDict = item as! NSDictionary
let id = itemDict["id"] as! Int
let name = itemDict["name"] as! String
let shower = itemDict["shower"] as! NSDictionary
let showerId = shower["id"] as! Int
let showerStatus = shower["status"] as! Int
let startLocation = shower["startLocation"] as! NSDictionary
let startLocationId = startLocation["id"] as! Int
let startLocationName = startLocation["name"] as! String
}
}
} catch {
print("Error: \(error.localizedDescription)")
}
}

Answer 6

this is what worked for me:
// Convert JSON to Array
func JSONToArray(_ json: String) -> Array<Any>? {
if let data = json.data(using: String.Encoding.utf8) {
do {
return try JSONSerialization.jsonObject(with: data, options: []) as? Array
} catch let error as NSError {
print(error)
}
}
return nil
}
After using this function i could loop trough the sub JSONs.
Thanks.