Question

我是swift的新手。我已经在表格视图中为json show实现了关于描述字段的搜索操作。

func updateSearchResults(for searchController: UISearchController) {
        // If we haven't typed anything into the search bar then do not filter the results

        if searchController.searchBar.text! == "" {
            filteredsneakernews = [classObject.descriptionn]
            self.results = self.placeHolderArray
            self.DiscoveryNewsTableView.reloadData()

        } else {
            // Filter the results
            //filteredsneakernews = [classObject.descriptionn].filter { $0.description.lowercased().contains(searchController.searchBar.text!.lowercased()) }
            results = results.filter {
                $0.description.lowercased().contains(searchController.searchBar.text!.lowercased()) }
           // self.results = self.placeHolderArray

              self.DiscoveryNewsTableView.reloadData()

        }
       // self.DiscoveryNewsTableView.reloadData()
    }

以下是表格视图的代码

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

        let cell = tableView.dequeueReusableCell(withIdentifier: "discoveryNewscell") as! DiscoveryNewsTableViewCell


       classObject.getDataForTableView(results: results, index: indexPath.row)
        //let image_url = filteredsneakernews[indexPath.row].image
       // cell.sneakerImageView.image=filteredsneakernews[indexPath.row].image
          self.placeHolderArray = self.results
        cell.newsTitle.text = classObject.descriptionn

        let imageURLPathString = newsurl + classObject.image

        let url1 = URL(string: imageURLPathString)
        print("xyz", url1)
        let data = try? Data(contentsOf: url1!)

        if let imageData = data {
            let image = UIImage(data: imageData)
            cell.sneakerImageView.image = image
        }

        return cell


    }

这是我从json

获取数据的类

class getData: NSObject {

    var descriptionn : String = ""
    var image : String = ""

//    static let shared = getData()

    func getDataForTableView(results: [[String:String]], index : Int){

        var productArray = [String:String]()
        productArray = results[index]

            descriptionn = productArray["description"]!
            image = productArray["images"]!

    }
}

搜索结果的搜索栏。当我完成搜索当搜索栏为空时我希望表视图应该重新加载数据。当搜索栏为空时，应该在表视图中显示所有记录。但是当搜索栏为空时它不会重新加载表视图< / strong>。您可以从此链接下载代码。 https://drive.google.com/file/d/1G3QUYLgLDwIjNKb-HB-zO98l14HrcRVe/view?usp=sharing

Answer 1

@ajadka我已经看到了你的代码并且存在一些小错误...只需更换此行即可正常工作..

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "discoveryNewscell") as! DiscoveryNewsTableViewCell
  // self.placeHolderArray = self.results comment this line here 
     ...... }

并将该行放在此处

 func single_news(userid: Int) {
        .......
    self.results = jsonValue.object(forKey: "data") as! [[String:String]]
    self.placeHolderArray = self.results //put here that line 
     ..........
 }

搜索栏为空时重新加载表格视图

1 个答案: