Getting the Picture dynamic from an WordPress Post - arrays

Question

I have a WordPress post and this contains a post picture that is updated regularly. I would like to dynamically query this post picture in Swift but have not yet found a solution for it.
Could someone help me?
Here is my code for which I am requesting a regular image at the moment:
var coursesPicture = [CoursesPicture]()
// MARK: - GUID
struct GUIDURL: Codable {
let rendered: String
}
// MARK: - Courses
struct Course: Codable {
let guid, title: GUID
let content: Content
let links: Links
enum CodingKeys: String, CodingKey {
case guid, title, content
case links = "_links"
}
}
// MARK: - Content
struct Content: Codable {
let rendered: String
let protected: Bool
}
// MARK: - GUID
struct GUID: Codable {
let rendered: String
}
// MARK: - Links
struct Links: Codable {
}
// MARK: - CoursePicture
struct CoursesPicture: Codable {
let featuredMedia: Int
enum CodingKeys: String, CodingKey {
case featuredMedia = "featured_media"
}
}
public func fetchJSONPicture() {
let urlString = "https://ismaning.de/wp-json/wp/v2/media/4291"
guard let url = URL(string: urlString) else { return }
URLSession.shared.dataTask(with: url) { (data, _, err) in
DispatchQueue.main.sync {
if let err = err {
print("Failed to get data from url:", err)
return
}
guard let data = data else { return }
do {
self.coursesPicture = [try JSONDecoder().decode(CoursesPicture.self, from: data)]
} catch let jsonErr {
print("Failed to decode:", jsonErr)
}
}
}
if let url = URL(string: "https://ismaning.de/wp-content/uploads/ismaning-willkommen-banner_app-ios.jpg") {
URLSession.shared.dataTask(with: url) { (data, urlResponse, error) in
if let data = data {
DispatchQueue.main.sync {
self.imageView.image = UIImage(data: data)
}
}
}.resume()
}
}
I simply query the image here via a URL. Nevertheless, it should be queried dynamically via a WordPress post. I also tried this JSON query but unfortunately I haven't found a solution yet
Thank you in advance for your help, as I have been looking for a solution for a while now

Answer 1

After discussion in the chat we found a working solution for this problem. If anyone else has this you can simply do this:
Create two structs, example Struct Response: Codable{}
Create two arrays which are of the struct types like: var arr:[Response] = []
In the ViewDidLoad you will call the getJsonData method with completion block.
When the data is loaded in the first array, you call the getJsonImage method with completion block.
Once you have the imageURL you can simply retrieve it by creating a URLSession to retrieve the image.
This is the solution code:
//Arrays
var firstArray:[FirstResponse] = []
var imgData:[ImgData] = []
override func viewDidLoad() {
super.viewDidLoad()
//Fetching the JSON data
fetchJSON {
//Fetching the JSON image
self.fetchJSONImage {
let imageUrl = self.imgData[0].link
self.imgView.downloaded(from: imageUrl)
}
}
}
//Retrieving the JSON data
func fetchJSON(completed: #escaping () -> ()){
var urlString = "HIDDEN"
urlString = urlString.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
guard let url = URL(string: urlString) else {return}
//Create the URLSession
URLSession.shared.dataTask(with: url) { (data, response, err) in
guard let data = data else{
return
}
do{
//Sets the dataArray to JSON data
self.firstArray = [try JSONDecoder().decode(FirstResponse.self, from: data)]
//Complete task in background
DispatchQueue.main.async {
completed()
}
}
catch let jsonErr{
print(jsonErr)
}
}.resume()
}
//Retrieving the image link from JSON
func fetchJSONImage(completed: #escaping () -> ()){
let imgPath = firstArray[0].featured_media
var urlString = "HIDDEN-URL\(imgPath)"
urlString = urlString.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
guard let url = URL(string: urlString) else {return}
//Create the URLSession
URLSession.shared.dataTask(with: url) { (data, response, err) in
guard let data = data else{
return
}
do{
//Sets the dataArray to JSON data
self.imgData = [try JSONDecoder().decode(ImgData.self, from: data)]
//Complete task in background
DispatchQueue.main.async {
completed()
}
}
catch let jsonErr{
print(jsonErr)
}
}.resume()
}
}
//Struct for getting image ID
struct FirstResponse: Codable{
let featured_media: Int
}
//Struct for getting the image link
struct ImgData: Codable{
let link: String
}
//Extension
extension UIImageView {
//Download the image from the API
func downloaded(from url: URL, contentMode mode: UIView.ContentMode = .scaleToFill) {
contentMode = mode
URLSession.shared.dataTask(with: url) { data, response, error in
guard let image = UIImage(data: data)
else { return }
//Continue in background
DispatchQueue.main.async() {
self.image = image
}
}.resume()
}
func downloaded(from link: String, contentMode mode: UIView.ContentMode = .scaleAspectFit) {
guard let url = URL(string: link) else { return }
downloaded(from: url, contentMode: mode)
}
}