我曾尝试在 ui 上显示收藏视图，但无法显示任何人都可以帮助我吗？ [复制]

Question

在这里我尝试实现集合视图但无法执行此操作，并且在滚动视图上我放置了集合视图如果不能这样实现是否正确，您可以提供任何解决方案以显示在 ui 和 在这个滚动视图中已经实现了视图并且所有元素都放在它上面是我的代码以及如何缩放选定的特定图像也有人可以帮助我吗？

    @IBOutlet var collectionView: UICollectionView!
    @IBOutlet var navigationBar: UINavigationBar!
    @IBOutlet var imageView: UIImageView!
    @IBOutlet var pageControl: UIPageControl!
    @IBOutlet var nameLabel: UILabel!
    @IBOutlet var priceLabel: UILabel!
    @IBOutlet var textview: UITextView!
    @IBOutlet var scrollView: UIScrollView!

    var productName = [String]()
    var productprice = [String]()
    var productdescription :String?
    var thumbnailimageArray = [String]()
    var imageArray = [String]()
    var pageIndex: Int = 0
    var imagesArray = [String]()

let urlString = "http://www.json-generator.com/api/json/get/cjpberBhKa?indent=2"

    override func viewDidLoad() {
        super.viewDidLoad()
        self.downloadJsonWithURL()
        collectionView.delegate = self
        collectionView.dataSource = self
        let swipeLeft = UISwipeGestureRecognizer(target: self, action: #selector(swiped(gesture:)))
        swipeLeft.direction = .left
        self.imageView.addGestureRecognizer(swipeLeft)
        swipeLeft.cancelsTouchesInView = false
        let swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(swiped(gesture:)))
        swipeRight.direction = .right
        self.imageView.addGestureRecognizer(swipeRight)
        swipeRight.cancelsTouchesInView = false
        imageView.isUserInteractionEnabled = true
        // Do any additional setup after loading the view.
    }
    func downloadJsonWithURL() {
        let url = NSURL(string: urlString)
        URLSession.shared.dataTask(with: (url as URL?)!, completionHandler: {(data, response, error) -> Void in
            if let jsonObj = try? JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? NSDictionary {
                print(jsonObj!.value(forKey: "Detail")!)
                if let detailsArray = jsonObj!.value(forKey: "Detail") as? NSArray {
                    if let detailDict = detailsArray[0] as? NSDictionary {
                        if let name = detailDict.value(forKey: "productName") {
                            self.productName.append(name as! String)
                        }
                        if let image1 = detailDict.value(forKey: "image1"){
                            self.imageArray.append(image1 as! String)
                        }
                        if let image2 = detailDict.value(forKey: "image2"){
                            self.imageArray.append(image2 as! String)
                        }
                        if let image3 = detailDict.value(forKey: "image3"){
                            self.imageArray.append(image3 as! String)
                        }
                        if let image4 = detailDict.value(forKey: "image4"){
                            self.imageArray.append(image4 as! String)
                        }
                        if let image5 = detailDict.value(forKey: "image5"){
                            self.imageArray.append(image5 as! String)
                        }
                        if let image6 = detailDict.value(forKey: "image6"){
                            self.imageArray.append(image6 as! String)
                        }
                        if let image7 = detailDict.value(forKey: "image7"){
                            self.imageArray.append(image7 as! String)
                        }
                        if let image8 = detailDict.value(forKey: "image8"){
                            self.imageArray.append(image8 as! String)
                        }
                        if let image9 = detailDict.value(forKey: "image9"){
                            self.imageArray.append(image9 as! String)
                        }
                        if let image10 = detailDict.value(forKey: "image10"){
                            self.imageArray.append(image10 as! String)
                        }
                        if let price = detailDict.value(forKey: "productPrice") {
                            self.productprice.append(price as! String)
                        }
                        if let description = detailDict.value(forKey: "productDes") {
                            self.productdescription = description as? String
                        }
                        if let image = detailDict.value(forKey: "img"){
                            self.imagesArray.append(image as! String)
                        }
                    }
                }
                OperationQueue.main.addOperation({
                    self.navigationBar.topItem?.title = self.productName[0]
                    self.textview.text = self.productdescription
                    self.priceLabel.text = self.productprice[0]
                    self.nameLabel.text = self.productName[0]
                    print(self.imageArray)
                    let imgURL = NSURL(string:self.imageArray[0])
                    let data = NSData(contentsOf: (imgURL as URL?)!)
                    self.imageView.image = UIImage(data: data! as Data)
                })
            }
        }).resume()
    }
    func swiped(gesture: UIGestureRecognizer) {
        if let swipeGesture = gesture as? UISwipeGestureRecognizer {
            switch swipeGesture.direction {
            case UISwipeGestureRecognizerDirection.right :
                if pageIndex == 0 {

                }else{
                    pageIndex -= 1
                }
                let imgURL = NSURL(string:self.imageArray[pageIndex])
                let data = NSData(contentsOf: (imgURL as URL?)!)
                self.imageView.image = UIImage(data: data! as Data)
                pageControl.numberOfPages = imageArray.count
                pageControl.currentPage = pageIndex
            case UISwipeGestureRecognizerDirection.left:
                if pageIndex >= imageArray.count-1{

                }else{
                    pageIndex += 1
                }
                let imgURL = NSURL(string:self.imageArray[pageIndex])
                let data = NSData(contentsOf: (imgURL as URL?)!)
                self.imageView.image = UIImage(data: data! as Data)
                pageControl.numberOfPages = imageArray.count
                pageControl.currentPage = pageIndex
            default:
                break
            }
        }
    }
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 1
    }
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return imagesArray.count
    }
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell",for:indexPath) as! DetailsCell
        let arr = imagesArray[indexPath.row]
        let urls = NSURL(string: arr)
        let data = NSData (contentsOf: urls! as URL)
        cell.imageView.image = UIImage(data: data! as Data)
        cell.nameLabel.text = self.productName[indexPath.row]
        cell.priceLabel.text = self.productprice[indexPath.row]
        cell.layer.borderColor = UIColor.lightGray.cgColor
        cell.layer.borderWidth = 0.7
     return cell
    }

Answer 1

从web service response 获取所有data 后重新加载collection view，如下所示。

collectionView.reloadData()

Answer 2

downloadJsonWithURL 加载后需要重新加载collectionview的数据。