I am trying out the new JSONDecoder() in swift 4 and am trying to parse the following flickr API response : (https://api.flickr.com/services/rest/?api_key=api_key&method=flickr.photos.search&format=json&per_page=25&text=hello&nojsoncallback=1). However I get an error saying that "error processing json data: The data couldn’t be read because it isn’t in the correct format." However the data seems to be in the correct format to me. Am I doing anything wrong?
let dataTask = session.dataTask(with: urlRequest) { (data, response, error) in
if let error = error {
print("json error: \(error.localizedDescription)")
return
} else if let data = data {
print(response)
do {
let decoder = JSONDecoder()
print(data)
let flickrPhotos = try decoder.decode(FlickrImageResult.self, from: data)
} catch {
dump(data)
print("json error: \(error.localizedDescription)")
}
}
}
dataTask.resume()
My data models are
struct FlickrImageResult : Codable {
var photos : FlickrPhoto? = nil
}
struct FlickrPhoto : Codable {
var photo : [FlickrURLs]? = nil
}
struct FlickrURLs: Codable {
var id : String? = nil
var owner: String? = nil
var secret: String? = nil
var server: String? = nil
var farm: String? = nil
}
I changed the number of images requested to 2 and Printing out the data returns Optional({"photos":{"page":1,"pages":120197,"perpage":2,"total":"240393","photo":[{"id":"36729752762","owner":"152440263@N02","secret":"e62ba3e18b","server":"4432","farm":5,"title":"Hello there","ispublic":1,"isfriend":0,"isfamily":0},{"id":"36729384952","owner":"141041947@N06","secret":"bc0e5af630","server":"4380","farm":5,"title":"POST\ud83d\udd25 #891 | Hello Tuesday | Krescendo","ispublic":1,"isfriend":0,"isfamily":0}]},"stat":"ok"})
The only problem with your model is that
farm
is actually anInt
. Here's a more complete version of your model accoirding to the docs (https://www.flickr.com/services/api/flickr.photos.search.html):P.S: The message
error processing json data: The data couldn’t be read because it isn’t in the correct format.
is the localized error message, useprint(error)
instead ofprint(errorlocalizedDescription)
to obtain all the error data available (in your case, it will print that there's an issue when trying to decode the farm key).