Swift- JSON Requests with more than one page - json

Question

I am using Alamofire and SwiftyJSON to access Youtube's API and get a channels's playlist count. My problem is that Youtube returns only 5 items per page (or request) and I don't know how to access the rest!
func getPlaylists() {
Alamofire.request(.GET, playlistURL).validate().responseJSON { response in
switch response.result {
case .Success:
if let value = response.result.value {
let json = JSON(value)
print(json["items"].count) //Always returns 5
}
case .Failure(let error):
print(error)
}
}
}
Can anybody let me know how to access the next set of results?

Answer 1

You'll find the answer in the API documentation, possibly here YouTube Data API.
Note: in your request, you can set the max items per page with a query parameter: maxResults. This can be 5 to 50, default equals 5.
When you get a response, the server returns a JSON containing a JSON value "nextToken": <string>. Use this value in your next request, where you insert a query parameter pageToken=<string>.
You might modify your getPlaylists method so that it takes a parameter nextToken: String. Initially call this method with an empty string or better an optional initialized to nil.
In your completion handler, retrieve the "nextToken" value from the JSON response. If it exists, call your method with this parameter. Otherwise, you got all pages.
Your method getPlaylists should also have a completion handler. Call the completion handler when all pages have been retrieved.