Question

我之前从未使用过水平滚动表视图，因此我不知道如何使用REST API填充垂直可滚动表视图。我在这里找到了一个例子：

＆＃39; https://github.com/ThornTechPublic/HorizontalScrollingCollectionView＆＃39;

使用硬编码数据，但是当我使用来自WS的数据时，表格单元格没有显示任何内容。

这是我的代码（是最重要的类，因为它是符合TableCell的类，在这种情况下是一个进入CollectionView的单元格，这是我调用REST API的地方）： / p>

class CategoryRow : UITableViewCell {
    @IBOutlet weak var collectionView: UICollectionView!
    var getUserData = ["clientType" : "2", "docType" : "002","docNum": "16191725","email": "corp.admin@postpago.com","msisdn": "914171620"]
    var purchases : NSArray = []

    struct MobileLines {
        let name:String
        let benefit:String
        let price:String
        let expiration:String

        init?(_ dict:[String:Any]?) {
            guard let _dict = dict,
                let name = _dict["name"] as? String,
                let benefit = _dict["benefit"] as? String,
                let price = _dict["price"] as? String,
                let expiration = _dict["expiration"] as? String
                else { return nil }

            self.name = name
            self.benefit = benefit
            self.price = price
            self.expiration = expiration
        }
    }

    var arrMobileLines = [MobileLines]()

    func getPurchases (_ userData: NSDictionary) {
        let url = URL(string: "http://162.209.99.39:8080/MiClaroBackend/purchase/mobile/MobilePostpaidActive-51914171620/products?type=voice")
        let session = URLSession.shared

        let request = NSMutableURLRequest(url: url!)
        request.httpMethod = "POST"

        self.getUserData = userData as! [String : String]
        let paramToSend = ["userData":userData]
        request.setValue("application/json", forHTTPHeaderField: "Content-Type")
        request.httpBody = try! JSONSerialization.data(withJSONObject: paramToSend)

        let task = session.dataTask(with: request as URLRequest, completionHandler: {
            (data, response, error) in

            guard let _:Data = data else
            {
                return
            }

            let json:AnyObject?

            do {
                json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary
                if let parseJSON = json{
                    let purchaseProducts = parseJSON["purchaseProducts"] as! NSArray
                    self.purchases = purchaseProducts

                    print(json!)
                }
            } catch {

            }
        })

        task.resume()
    }
}

extension CategoryRow : UICollectionViewDataSource {

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

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "videoCell", for: indexPath) as! VideoCell
        self.arrMobileLines = self.purchases.flatMap({ MobileLines($0 as? [String:Any])})

        let dataAtIndex = self.arrMobileLines[indexPath.row]

        cell.name.text = String(dataAtIndex.name)
        return cell
    }

}

extension CategoryRow : UICollectionViewDelegateFlowLayout {

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        let itemsPerRow:CGFloat = 4
        let hardCodedPadding:CGFloat = 5
        let itemWidth = (collectionView.bounds.width / itemsPerRow) - hardCodedPadding
        let itemHeight = collectionView.bounds.height - (2 * hardCodedPadding)
        return CGSize(width: itemWidth, height: itemHeight)
    }

}

CollectionViewCell只有一个标签：

import UIKit

class VideoCell : UICollectionViewCell {

    @IBOutlet weak var name: UILabel!
}

最后我有一个ViewController，其中调用REST API的方法是在ViewDidLoad（）中实现的：

class ViewController: UIViewController {
    var categories = ["Action", "Drama", "Science Fiction", "Kids", "Horror"]

    var categoryRow = CategoryRow()

    override func viewDidLoad() {
        super.viewDidLoad()
        categoryRow.getPurchases(categoryRow.getUserData as NSDictionary)

    }

}

extension ViewController : UITableViewDelegate { }

extension ViewController : UITableViewDataSource {

    func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
        return categories[section]
    }

    func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 1
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "cell") as! CategoryRow
        return cell
    }

}

这就是故事板的样子：

最后这是应用程序显示的内容（无）：

正如您在下面的图片中看到的那样，App正在返回WS数组，因此这不是问题所在。另一个奇怪的事情是，当它应该是红色时，细胞的背景显得很黑。

如何使用来自WS的数组填充水平可滚动UITableView？

0 个答案: