Parse Youtube api in Swift 4 using Alamofire - ios

Question

I'm trying to parse Youtube api in using Alamofire in Swift 4
so far i did get the results and all fine but i'm having trouble accessing the "items"
so basically i want to access title, description, medium thumbnails url and resultsPerPage.
i tried a lot of solutions but non if them worked for me specially i'm using Swift4 and Alamofire
JSON:
{
"kind":"youtube#searchListResponse",
"etag":"\"XI7nbFXulYBIpL0ayR_gDh3eu1k/N6oV8CScLhAtqc_fDnA3Nw4U3RA\"",
"nextPageToken":"CBkQAA",
"regionCode":"US",
"pageInfo":{
"totalResults":922098,
"resultsPerPage":25
},
"items":[
{
"kind":"youtube#searchResult",
"etag":"\"XI7nbFXulYBIpL0ayR_gDh3eu1k/Oxu5v7t2PHcDK4wvSo-xsIp3Raw\"",
"id":{ },
"snippet":{
"publishedAt":"2011-03-21T08:32:25.000Z",
"channelId":"UC1r4VtVE__5K6c_L_3Vlxxg",
"title":"fouseyTUBE",
"description":"",
"thumbnails":{
"default":{
"url":"https://yt3.ggpht.com/-oBs78-0JLws/AAAAAAAAAAI/AAAAAAAAAAA/zKWHSghRD3U/s88-c-k-no-mo-rj-c0xffffff/photo.jpg"
},
"medium":{
"url":"https://yt3.ggpht.com/-oBs78-0JLws/AAAAAAAAAAI/AAAAAAAAAAA/zKWHSghRD3U/s240-c-k-no-mo-rj-c0xffffff/photo.jpg"
},
"high":{
"url":"https://yt3.ggpht.com/-oBs78-0JLws/AAAAAAAAAAI/AAAAAAAAAAA/zKWHSghRD3U/s800-c-k-no-mo-rj-c0xffffff/photo.jpg"
}
},
"channelTitle":"fouseyTUBE",
"liveBroadcastContent":"none"
}
}
]
}
My Code :
let url = "https://www.googleapis.com/youtube/v3/search"
let parameters = ["q": searchText, "maxResults": 25, "part": "snippet", "type":"video", "key": "MY_YOUTUBE_API_KEY"] as [String : Any]
Alamofire.request(url, method: .get, parameters: parameters, encoding: URLEncoding.default, headers: nil).responseData { (dataResponse) in
if let err = dataResponse.error {
print("Failed to contact server", err)
return
}
guard let data = dataResponse.data else {return}
do{
let searchResult = try
JSONDecoder().decode(SearchResults.self, from: data)
print("Results Count:", searchResult.kind)
searchResult.items.forEach({ (data) in
print(searchResult.items["data"]["items"])
})
self.musics = searchResult.items
self.tableView.reloadData()
}catch let decodeErr {
print("Failed to Descode: ", decodeErr)
}
}
}
struct SearchResults: Decodable{
let kind: String
let items: [Music]
}
Music.Swift file
struct Music: Decodable {
var etag: String?
var kind: String?
//let time: String
}

Answer 1

I would suggest creating decodable struct for each nested elements like so,
struct PageInfo: Decodable {
var totalResults = 0
var resultsPerPage = 0
}
struct Snippet: Decodable {
var channelId = ""
var title = ""
var description = ""
var channelTitle = ""
var thumbnails: Thumbnail
}
struct ChannelURL: Decodable {
var url = ""
}
struct Thumbnail: Decodable {
var medium: ChannelURL
var high: ChannelURL
}
struct Item: Decodable {
var kind = ""
var etag = ""
var snippet: Snippet
}
struct Result: Decodable {
var kind = ""
var etag = ""
var pageInfo: PageInfo
var items: [Item]
}
And then proceed with the decoding. The following decoding works with your response above.
do {
let decoded = try JSONDecoder().decode(Result.self, from: data)
debugPrint(decoded)
//Now access the data
print(decoded.pageInfo.resultsPerPage) // 25
//since the items is array we take first for now
if let firstItem = decoded.items.first {
//to print the first one
print(firstItem.snippet.channelTitle) // "fouseyTUBE"
//same for URL
print(firstItem.snippet.thumbnails.medium.url) // https://yt3.ggpht.com/-oBs78-0JLws/AAAAAAAAAAI/AAAAAAAAAAA/zKWHSghRD3U/s240-c-k-no-mo-rj-c0xffffff/photo.jpg
}
} catch {
debugPrint("\(error.localizedDescription)")
}
This is the best case scenario were all data is present. So you will have to modify your structure accordingly making some values ``