从 api 获取所有数据以及如何在 swift ios 中仅在单元格上附加标题

Posted 2023-03-07

【中文标题】从 api 获取所有数据以及如何在 swift ios 中仅在单元格上附加标题

【英文标题】：get all data from an api and how to append only the title on a cell in swift ios

【发布时间】：2018-04-07 07:21:40

【问题描述】：

我的代码如下，用于使用 alamofire 从 api 中提取数据。我只拉了“标题”。并附加它。我想要的是如何从 api 获取所有数据，包括 id、body 和所有数据，但只会在单元格上附加名称，我不希望显示所有数据。只有当您选择单元格#(indexPath.item) 时，才会显示数据的详细信息！其详细信息将显示在警报中。我在下面有我的警报代码。例如，我获取了所有数据，但我只显示单元格上的“标题”，当我单击单元格时，它将显示其数据，就像我单击 indexpath 为 1 的标题时，它将显示 id、正文和所有详细信息的那个标题。谢谢。

alert

let alert = UIAlertController(title: "\(titleArray[indexPath.row])", message: "", preferredStyle:
                                    UIAlertControllerStyle.alert)
                                let subview = (alert.view.subviews.first?.subviews.first?.subviews.first!)! as UIView

                                subview.backgroundColor = UIColor(red: 93/255, green: 173/255, blue: 195/255, alpha: 1.0)

                                alert.view.tintColor = UIColor.black
                                alert.addAction(UIAlertAction(title: "Cancel", style: UIAlertActionStyle.cancel, handler: nil))
                                alert.addAction(UIAlertAction(title: "OK", style: .default, handler:  [weak alert] (_) in
                                    //                        let textField = alert?.textFields![0] // Force unwrapping because we know it exists.
                                    //
                                    //                        if textField?.text != ""
                                    //                            print("Text field: \(textField?.text!)")
                                    //                            self.saveDataInCoreData(nameOfGroccery: (textField?.text)!)
                                    //                            self.setUpCollectionView()
                                    //                        
//
//                                    item.isSelected = true
                                    print("oo")
                                ))
                                self.present(alert, animated: true, completion: nil)

API 示例

“用户ID”：1， “身份证”：1， "title": "sunt aut facere repellat provident occaecati excepturi optio reprehenderit", “body”：“quia et suscipit\nsuscipit recusandae consequuntur expedita et cum\nreprehenderit molestiae ut ut quas totam\nnostrum rerum est autem sunt rem eveniet architecto” ,

import UIKit
import Alamofire



class MenuCollectionViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource 

    var titleArray = [String]()

    @IBOutlet var collectionView: UICollectionView!
    @IBAction func signOutButtonIsPressed(_ sender: Any) 
        let appDelegate : AppDelegate = UIApplication.shared.delegate as! AppDelegate
        appDelegate.showLoginScreen()
    
    @IBOutlet var signoutButton: UIButton!
    var items = [Item]()

    override func viewDidLoad() 
        super.viewDidLoad()

        self.signoutButton.layer.cornerRadius = 3.0
        demoApi()
    

    override func viewWillAppear(_ animated: Bool) 
         super.viewWillAppear(animated)

        self.navigationController?.navigationBar.isHidden = true
        self.navigationItem.hidesBackButton =  true

    

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int 
        return titleArray.count
    


    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell 

       let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath) as! CollectionCell
        cell.nameLabel.text = titleArray[indexPath.row]
        return cell
    



    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) 
        // handle tap events
        print("You selected cell #\(indexPath.item)!")
    

    func demoApi() 
        Alamofire.request("https://jsonplaceholder.typicode.com/posts", method: .get, parameters: nil, encoding: JSONEncoding.default, headers: nil).responseJSON  (response:DataResponse<Any>) in

            switch(response.result) 
            case .success(_):
                guard let json = response.result.value as! [[String:Any]]? else return
                print("Response \(json)")
                for item in json 

                    if let title = item["title"] as? String 
                        self.titleArray.append(title)
                    

                    DispatchQueue.main.async 
                        self.collectionView.reloadData()
                    
                
                break

            case .failure(_):
                print("Error")
                break

            
        

    




class CollectionCell: UICollectionViewCell 

    @IBOutlet weak var imgPhoto: UIImageView!
    @IBOutlet weak var nameLabel: UILabel!

【参考方案1】：

喜欢

第一步

在当前类中创建字典数组

var getAllDetail: [[String:Any]] = [[String:Any]]()

第二步

将您的迭代字典附加到名为 getAllDetail 的新字典数组中

 case .success(_):
            guard let json = response.result.value as! [[String:Any]]? else return
            print("Response \(json)")
            for item in json 

                  getAllDetail.append(item)

               // if let title = item["title"] as? String 
                 //   self.titleArray.append(title)
               // 

            
             if !getAllDetail.isEmpty
                DispatchQueue.main.async 
                    self.collectionView.reloadData()
                
                 
            break

第三步

最后将值附加到您的收藏视图

 func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int 
        return getAllDetail.count
    


    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell 

       let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath) as! CollectionCell
        if let getTempDetails: [String : Any] = getAllDetail[indexPath.row] 
        cell.nameLabel.text = getTempDetails["title"] as? String  ?? "" //titleArray[indexPath.row]
          
        return cell
    



    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) 

        // handle tap events
        print("You selected cell #\(indexPath.item)!")
        if let getTempDetails: [String : Any] = getAllDetail[indexPath.row] 
           print("You selected ID #\( getTempDetails["userId"] as? String  ?? "" )!")
    

    

【讨论】：

条件绑定的初始化程序必须具有可选类型，而不是 '[String : Any]' 在行 if let getTempDetails = getAllDetail[indexPath.row]

@DurnKurvirck- 更改此if let getTempDetails: [String : Any] = getAllDetail[indexPath.row]

我会实施它先生

“getAllDetail”重新声明无效

哎呀对不起我的错误