Question

我已经搞混了这么长时间了，我无法弄清楚如何将URL加载到我拥有的UICollectionView中。我能够仅打印该图像中显示的URL。

此外，这也是我打印JSON时的样子。

这是我用来访问API的游乐场代码。

let fortniteChallengesURL9 = URL(string: "https://api.fortnitetracker.com/v1/store")
    if let unwrappedURL = fortniteChallengesURL9 {
      var request = URLRequest(url: unwrappedURL) request.addValue("MY API KEY", forHTTPHeaderField: "TRN-Api-Key")

let dataTask = URLSession.shared.dataTask(with: request) { (data, response, err) in

    if let data = data {

        do {


            let json = try JSONSerialization.jsonObject(with: data, options: [])
            print(json)
            print((json as AnyObject).value(forKey: "imageUrl")!)
           // print((json as AnyObject).value(forKey: "name")!)

            let urlImages = (json as AnyObject).value(forKey: "imageUrl")!





            DispatchQueue.main.asyncAfter(deadline: .now() ) {



            }


        } catch let jsonErr {
            print("Error serializing json:", jsonErr)

        }

    }



}
dataTask.resume()

}

然后是我要放入的UICollectionView。但是，我弄乱了这段代码，试图弄清楚该怎么做。我认为，当前集合中的图像必须替换为WebViews。

var arrayOfImages = [UIImage]()
var arrayOfIds = [String]()

override func viewDidLoad() {
    super.viewDidLoad()





    let collectionViewLayout = collectionView.collectionViewLayout as? UICollectionViewFlowLayout
    collectionViewLayout?.sectionInset = UIEdgeInsets(top: 20, left: 20, bottom: 0, right: 20)
    collectionViewLayout?.invalidateLayout()

    arrayOfImages = [#imageLiteral(resourceName: "Sats"),#imageLiteral(resourceName: "location"),#imageLiteral(resourceName: "news"),#imageLiteral(resourceName: "challengeBtn"),#imageLiteral(resourceName: "LTM")]
    arrayOfIds = ["A","B","C","D","E"]

}

override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return arrayOfImages.count
}

override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as UICollectionViewCell

    let imageView = cell.viewWithTag(1) as! UIImageView
    imageView.image = arrayOfImages[indexPath.row]

    return cell

}

override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    let name = arrayOfIds[indexPath.row]
    let viewController = storyboard?.instantiateViewController(withIdentifier: name)
    self.navigationController?.pushViewController(viewController!, animated: true)
}

如果任何人都可以找到有关如何执行此操作的完整教程的链接，那将很棒。如果不是，请提供帮助，因为我不知道从何处开始使用collectionView，并且我只想使用swift而不使用任何第三方变通办法。另外，我会用我认为还是只保留imageViews的webView替换图像视图。

Answer 1

您可以尝试

struct Root:Decodable {  
   let imageUrl:String
}

var arrayOfImages = [Root]()

arrayOfImages = try? JSONDecoder().decode([Root].self,from:data)

然后在cellForRowAt内使用SDWebImage

imageView.sd_setImage(with: URL(string:arrayOfImages[indexPath.row].imageUrl), placeholderImage: UIImage(named: "placeholder.png"))

不要在回调内重新加载集合

DispatchQueue.main.async { 
   self.collectionView.reloadData()
}

如何从JSON获取这些网址以加载到Xcode UICollection中？

1 个答案: