How to iterate through array to pull out properties for specifc keys? - ios

Question

Im working with decoded JSON, and specifically i need to work within an array to pull out a property of a specific object based on its key.
JSON looks like the following, and Im needing to pull out the filenames for "fanart" and "clearlogo"
{
"code": 200,
"status": "Success",
"data": {
"count": 1,
"base_url": {
"original": "https://cdn.thegamesdb.net/images/original/",
"small": "https://cdn.thegamesdb.net/images/small/",
"thumb": "https://cdn.thegamesdb.net/images/thumb/",
"cropped_center_thumb": "https://cdn.thegamesdb.net/images/cropped_center_thumb/",
"medium": "https://cdn.thegamesdb.net/images/medium/",
"large": "https://cdn.thegamesdb.net/images/large/"
},
"images": {
"2578": [
{
"id": 5512,
"type": "boxart",
"side": "front",
"filename": "boxart/front/2578-1.jpg",
"resolution": "1533x2155"
},
{
"id": 5513,
"type": "boxart",
"side": "back",
"filename": "boxart/back/2578-1.jpg",
"resolution": "1522x2155"
},
{
"id": 87092,
"type": "fanart",
"side": null,
"filename": "fanart/2578-1.jpg",
"resolution": "1920x1080"
},
{
"id": 87093,
"type": "fanart",
"side": null,
"filename": "fanart/2578-2.jpg",
"resolution": "1920x1080"
},
{
"id": 87094,
"type": "fanart",
"side": null,
"filename": "fanart/2578-3.jpg",
"resolution": "1920x1080"
},
{
"id": 87095,
"type": "clearlogo",
"side": null,
"filename": "clearlogo/2578.png",
"resolution": "400x300"
},
{
"id": 87096,
"type": "screenshot",
"side": null,
"filename": "screenshots/2578-1.jpg",
"resolution": null
},
{
"id": 87097,
"type": "screenshot",
"side": null,
"filename": "screenshots/2578-2.jpg",
"resolution": null
},
{
"id": 87098,
"type": "fanart",
"side": null,
"filename": "fanart/2578-4.jpg",
"resolution": "1920x1080"
},
{
"id": 87099,
"type": "screenshot",
"side": null,
"filename": "screenshots/2578-3.jpg",
"resolution": null
},
{
"id": 87100,
"type": "screenshot",
"side": null,
"filename": "screenshots/2578-4.jpg",
"resolution": null
},
{
"id": 87101,
"type": "fanart",
"side": null,
"filename": "fanart/2578-5.jpg",
"resolution": "1920x1080"
}
]
}
},
The key "2578"is dynamic and changes by the game. I have this succesfuly decoding with the following:
struct GameDBData : Decodable {
let data : GameDataImages
}
struct GameDataImages : Decodable {
let images : Images
}
struct Images : Decodable {
var innerArray: [String: [Inner]]
struct Inner: Decodable {
let id : Int
let fileName : String
let type : String
enum CodingKeys : String, CodingKey {
case id
case fileName = "filename"
case type
}
}
private struct CustomCodingKeys: CodingKey {
var stringValue : String
init?(stringValue : String) {
self.stringValue = stringValue
}
var intValue: Int?
init?(intValue: Int) {
return nil
}
}
init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: CustomCodingKeys.self)
self.innerArray = [String: [Inner]]()
for key in container.allKeys {
let value = try container.decode([Inner].self, forKey: CustomCodingKeys(stringValue: key.stringValue)!)
self.innerArray[key.stringValue] = value
}
}
}
Ive tried firstIndex(where:) but Im not getting anywhere with it. How can i iterate the 2578 array to get the filename for type: "clearlogo" and type: "fanart" im needing?

Answer 1

You have array of Inner.Something like this,
var array:[Inner] = [_yourData]
If we assume your array should have only one object with type "fanart" & "clearlogo" for each.we can get each filename using ,
let fanartFileName = array.filter({$0.type == "fanart"})[0].fileName
let clearlogoFileName = array.filter({$0.type == "clearlogo"})[0].fileName
some times your array havn't any record for these types.or have more than one,
let fanartArray = ar.filter({$0.type == "fanart"})
if fanartArray.count > 0 {
fanartArray.forEach { (record) in
print(record.fileName)
}
}