如何通过API URL显示图像?迅速 [英] How can I display an image by an API URL? Swift

问题描述

我有一个应用程序，其中向我显示来自API的数据.我做了一个获取数据的服务，其中URL(string =")是API的URL:

I have an app in which it shows me data from an API. I made a service that gets the data, where URL(string = "") is the url of the API:

class Webservice {

    func getAllMatches(completion: @escaping ([Matches.Matchs]?) -> ()) {

        guard let url = URL(string: "API")
            else {
                fatalError("URL is not correct!")
        }
        URLSession.shared.dataTask(with: url) { data, _, _ in

            let matchs = try! JSONDecoder().decode([Matches.Matchs].self, from: data!)
            DispatchQueue.main.async {
                completion(matchs)
            }
        }.resume()
    }

}

然后我创建了一个其中设置了API字段的ViewModel:

Then I made a ViewModel in which the API fields were set:

class MatchListViewModel: ObservableObject {

    @Published var matches = [MatchViewModel]()


    init() {
        fetchMatch()


    }

    func fetchMatch() {

        Webservice().getAllMatches { matches in

            if let matches = matches {
                self.matches = matches.map(MatchViewModel.init)
            }
        }
    }

}


class MatchViewModel {

    let id = UUID()

    var match: Matches.Matchs

    init(match: (Matches.Matchs)) {
        self.match = match
    }


    var championship: String {
        return self.match.championship.name
    }

    var local_Name: String {
        return self.match.local.name
    }

    var local_Image: String  {
        return self.match.local.image
    }

    var local_goals: Double {
        return self.match.local_goals
    }

    var local_penalty_goals: Double {
        return self.match.local_penalty_goals
    }
    var stadium_Name: String {
        return self.match.stadium.name
    }

}

在API中，有一个显示图像的字段，该字段包含在URL中，我举一个例子:

In the API, there is a field that shows an image, which is contained in a URL, I leave an example:

"local":{  
     "slug":"nombre",
     "name":"nombre",
     "short_name":"nombre",
     "image":"https://s3.amazonaws.com/funx-futbol/dashboard/ad.png"
 },

我的问题是:如何通过该URL显示该图像?API查询有效，因为它为我带来了我所需的信息，但是我需要通过该链接向我展示图像，但是我没有实现.

My question is: How can I display that image via that URL? The API query works, as it brings me the information I require, but I need to show me the image through that link, which I have not achieved.

感谢阅读！

错误

推荐答案

使用这样的加载器加载数据:

Use a loader like this to load the data:

import Combine

public class DataLoader: ObservableObject {

    public let objectWillChange = PassthroughSubject<Data,Never>()

    public private(set) var data = Data() {
        willSet {
            objectWillChange.send(newValue)
        }
    }

    private let resourseURL: URL?

    public init(resourseURL: URL?){
        self.resourseURL = resourseURL
    }

    public func loadImage() {
        guard let url = resourseURL else {
            return
        }

        URLSession.shared.dataTask(with: url) { (data,_,_) in
            guard let data = data else {
                return
            }
            DispatchQueue.main.async {
                self.data = data
            }
        }   .resume()
    }
}

和一个类似的结构来显示它:

And a struct like this to display it:

import SwiftUI 

struct WebImage: View {

    @ObservedObject private var imageLoader: DataLoader

    public init(imageURL: URL?) {
        imageLoader = DataLoader(resourseURL: imageURL)
    }

    public var body: some View {
        if let uiImage = UIImage(data: self.imageLoader.data) {
            return AnyView(Image(uiImage: uiImage)
                            .resizable()
                            .aspectRatio(contentMode: ContentMode.fit))
        } else {
            return AnyView(Image(systemName: "ellipsis")
                            .onAppear(perform: { self.imageLoader.loadImage() }))
        }
    }
}

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