Ios 无法向委托发送数据

我会try 使用MVVM获取Pokemon的一个API的数据，我使用我的MainViewModel执行请求，如果我在MainViewModel中打印Pokemon数组，我会得到数组，但当我将数组发送给代表时，我无法在MainViewDelegate中显示该array. 向你问好.

当我在MainViewModel中打印数据时，得到的数据如下所示.

[Pokemon.PokemonModel(name: "bulbasaur", imageURL: "https://pokeapi.co/api/v2/pokemon/1/"), Pokemon.PokemonModel(name: "ivysaur", imageURL: "https://pokeapi.co/api/v2/pokemon/2/"), Pokemon.PokemonModel(name: "venusaur", imageURL: "https://pokeapi.co/api/v2/pokemon/3/")]

//  MainViewController.swift
override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = .systemGray6

        setUpView()
        setUpLayout()
        viewModel.fetchPokemon()
    }

//  MainViewModel.swift
import UIKit

class MainViewModel {
    let pokemonUrl = "https://pokeapi.co/api/v2/pokemon?limit=898&offset=0"
    var delegate: MainViewDelegate?

    func getPokemonImage() -> UIImage {
        return UIImage(named: "pikachu")!
    }

    func getTitleButton() -> String {
        return "Pokemon"
    }

    func fetchPokemon() {
        performRequest(with: pokemonUrl)
    }

    private func performRequest(with urlString: String) {
        // 1. Create/get URL
        if let url = URL(string: urlString) {
            // 2. Create URLSession
            let session = URLSession(configuration: .default)
            // 3. Give the session a task
            let task = session.dataTask(with: url) { [self] data, response, error in
                if error != nil {
                    delegate?.didFailWithError(error: error!)
                }

                if let safeData = data {
                    if let pokemon = self.parseJSON(pokemonData: safeData) {
                        delegate?.didUpdatePokemon(pokemons: pokemon)
                        print(pokemon)
                    }
                }
            }
            // 4. Start the task
            task.resume()
        }
    }

    private func parseJSON(pokemonData: Data) -> [PokemonModel]? {
        let decoder = JSONDecoder()
        do {
            let decodeData = try decoder.decode(PokemonData.self, from: pokemonData)
            let pokemon = decodeData.results?.compactMap({
                if let name = $0.name, let imageURL = $0.url {
                    return PokemonModel(name: name, imageURL: imageURL)
                }
                return nil
            })
            return pokemon
        } catch {
            return nil
        }
    }
    
}

//  MainView+Delegates.swift
import UIKit

// MARK: - Custom Delegates

extension MainViewController: MainViewDelegate {
    func didFailWithError(error: Error) {
        print(error)
    }

    func didUpdatePokemon(pokemons: [PokemonModel]) {
        print(pokemons)
    }
}


extension Collection where Indices.Iterator.Element == Index {
    public subscript(safe index: Index) -> Iterator.Element? {
        return (startIndex <= index && index < endIndex) ? self[index] : nil
    }
}

// Get 4 items
extension Collection {
    func choose(_ n: Int) -> Array<Element> {
        Array(shuffled().prefix(n))
    }
}

//
//  MainView+Protocols.swift
//

import Foundation

// MARK: - Que es lo que debe de tener

protocol MainViewDelegate {
    func didUpdatePokemon(pokemons: [PokemonModel])
    func didFailWithError(error: Error)
}

//
//  PokemonData.swift

import UIKit

// MARK: - PokemonData

struct PokemonData: Codable {
    let results: [Result]?
}

struct Result: Codable {
    let name: String?
    let url: String?
}

//
//  PokemonModel.swift

import Foundation

struct PokemonModel {
    let name: String
    let imageURL: String
}

我try 使用委托来使用数据.