pass values dynamically for network request - ios

Question

I have to pass the value of movie.id which is received from a View which is called ReviewView.
I need to pass the movie.id value received in this view to ReviewFetcher and then make a network request using that movie.id. As of now I have hard coded the movie id in ReviewFetcher but I require this to be received from ReviewView and then make a request and then update the list in ReviewView.
Below is the Code:-
ReviewFetcher.swift
import Foundation
import Alamofire
import SwiftUI
class ReviewObserver: ObservableObject {
#Published var review = ReviewArray(id: 1, page: 9, results: [])
// #State var movieID:Int
init() {
// self.movieID = movieID
getReviews(movieID : 181812)
}
func getReviews(movieID:Int) {
//self.review.results.removeAll()
let reviewURL = "https://api.themoviedb.org/3/movie/"+String(movieID)+"/reviews?api_key=a18f578d774935ef9f0453d7d5fa11ae&language=en-US&page=1"
Alamofire.request(reviewURL)
.responseJSON { response in
if let json = response.result.value {
if (json as? [String : AnyObject]) != nil {
if let dictionaryArray = json as? Dictionary<String, AnyObject?> {
let json = dictionaryArray
if let id = json["id"] as? Int,
let page = json["page"] as? Int,
let results = json["results"] as? Array<Dictionary<String, AnyObject?>> {
for i in 0..<results.count {
if let author = results[i]["author"] as? String,
let content = results[i]["content"] as? String,
let url = results[i]["url"] as? String {
let newReview = ReviewModel(author: author,
content: content,
url: url)
self.review.results.append(newReview)
}
}
}
}
}
}
}
}
}
ReviewView.swift
import SwiftUI
struct ReviewsView: View {
#State var movie: MovieModel
#Binding var reviews:[ReviewModel]
#ObservedObject var fetcher = ReviewObserver()
var body: some View {
VStack(alignment:.leading) {
Text("Review")
.font(.largeTitle)
.bold()
.foregroundColor(Color.steam_rust)
.padding(.leading)
Divider()
// Text(String(fetcher.movieID))
List(fetcher.review.results) { item in
VStack(alignment:.leading) {
Text("Written by : "+item.author)
.font(.body)
.bold()
.padding(.bottom)
Text(item.content)
.font(.body)
.lineLimit(.max)
}
}
}
}
}
MovieModel.swift
import Foundation
import SwiftUI
import Combine
struct MovieArray: Codable {
var page: Int = 0
var total_results: Int = 0
var total_pages: Int = 0
var results: [MovieModel] = []
}
struct MovieModel: Codable, Identifiable {
var id : Int
var original_title: String
var title: String
var original_language:String
var overview: String
var poster_path: String?
var backdrop_path: String?
var popularity: Double
var vote_average: Double
var vote_count: Int
var video: Bool
var adult: Bool
var release_date: String?
}

Answer 1

Remove the init() of your ReviewObserver class. and then call getReviews method in .onAppear modifier of your VStack. The idea of what you need:
class ReviewObserver: ObservableObject {
#Published var review = ReviewArray(id: 1, page: 9, results: [])
func getReviews(movieID:Int) {
//you block,, anything you wanna do with movieID.
//Assume you are going to change 'review' variable
}
}
struct ReviewsView: View {
#State var movie:MovieModel
#Binding var reviews:[ReviewModel]
#ObservedObject var fetcher = ReviewObserver()
var body: some View {
VStack(alignment:.leading){
Text("Review")
Divider()
Text(String(fetcher.movieID))
List(fetcher.review.results)
{
item in
VStack(alignment:.leading){
Text("Written by : "+item.author)
}
}.onAppear {
self.fetcher.getReviews(movieID: movie.id)
}
}
}