ios - 如何在 uitableview 的 cellForRowAt 函数中按标题日期对响应进行排序

Question

我目前有来自 json 的 json 响应这是一个 [NSDictionary]。这显示在表格 View 中，我能够将排序的日期设置到标题中，但是我在 cellForRowAt 函数中设置 uilabel 时遇到困难。我想要显示的表格 View 有一个排序日期的标题标题(我已经有了)，该部分下方是与标题具有相同日期的名称。我在下面提供了这方面的代码。感谢您的帮助和建议。

import UIKit
import Alamofire

class JSONTableViewController: UITableViewController 

{

var responseValue:[NSDictionary] = []
var sortedResponsevalue:[NSDictionary] = []
var sectionHeaderArray:[String] = []
var rowTitle:[String] = []

override func viewDidLoad() {
    super.viewDidLoad()
}

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    for response in self.responseValue {
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "yyyy-MM-dd"
        let responseDate = response.object(forKey: "date") as! String
        let date = dateFormatter.date(from: responseDate)
        print(date!.toString(dateFormat: "MMM d, yyyy"))
        self.sectionHeaderArray.append(date!.toString(dateFormat: "MMM d, yyyy"))
        self.rowTitle.append(response.object(forKey: "name") as! String)
    }
    print(self.sectionHeaderArray.count)
}

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

// MARK: - Table view data source

override func numberOfSections(in tableView: UITableView) -> Int {
    // #warning Incomplete implementation, return the number of sections
    return self.sectionHeaderArray.count
}

override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return self.sectionHeaderArray[section].count
}

override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
    return 80
}


override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "jsonCell", for: indexPath) as! JSONTableViewCell

    if let nameString = self.responseValue[indexPath.row].object(forKey: "name") as? String {
        cell.jsonLabel.text = nameString

    }


      return cell
    }
}

Answer 1

我从您的问题中了解到的是:您在 cellForRow 方法中获得了与“nameString”相同的标题。

问题是

if let nameString = self.responseValue[indexPath.row].object(forKey: "name") as? String {
        cell.jsonLabel.text = nameString
    }

您正在传递节数self.sectionHeaderArray.count。由于总部分 = 100 并且每个部分只有 1 行，因此标题将始终保持不变。

尝试一下:使用indexPath.section而不是indexPath.row来获取不同的标题

if let nameString = self.responseValue[indexPath.section].object(forKey: "name") as? String {
        cell.jsonLabel.text = nameString
    }

编辑

class JSONTableViewController: UITableViewController
{
    var responseValue:[NSDictionary] = []
    var sortedResponsevalue:[NSDictionary] = []
    var sectionHeaderArray = [[String: Any]]()

    override func viewDidLoad() {
        super.viewDidLoad()

    }

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

        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "yyyy-MM-dd"
        var currentDate: String? = nil
        var nameArray = [String]()
        for (index,response) in self.responseValue.enumerated() {
            let responseDate = response.object(forKey: "date") as! String
            let date = dateFormatter.date(from: responseDate)
            let dateString = date!.toString(dateFormat: "MMM d, yyyy")
            let nameString = response.object(forKey: "name") as! String
            if currentDate == nil {
                // FIRST TIME
                currentDate = dateString
                nameArray.append(nameString)

            } else {
                // CHECK IF DATES EQUAL, THEN KEEP ADDING
                if currentDate == dateString {
                    nameArray.append(nameString)
                    if index == self.responseValue.count - 1 {
                        let dictToAppend: [String : Any] = ["date": currentDate!, "names": nameArray]
                        self.sectionHeaderArray.append(dictToAppend)
                    }
                } else {
                    let dictToAppend: [String : Any] = ["date": currentDate!, "names": nameArray]
                    self.sectionHeaderArray.append(dictToAppend)
                    currentDate = dateString
                    nameArray.removeAll()
                    nameArray.append(nameString)
                }
            }
        }

    }

    override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
        let dictInfo = self.sectionHeaderArray[section]
        let dateString = dictInfo["date"]
        return dateString as? String
    }

    // MARK: - Table view data source

    override func numberOfSections(in tableView: UITableView) -> Int {
        // #warning Incomplete implementation, return the number of sections
        return self.sectionHeaderArray.count
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        let dictInfo = self.sectionHeaderArray[section]
        let namesArray = dictInfo["names"] as! [String]

        return namesArray.count
    }

    override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        return 80
    }


    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "jsonCell", for: indexPath) as! JSONTableViewCell

        let dictInfo = self.sectionHeaderArray[indexPath.section]
        let namesArray = dictInfo["names"] as! [String]
        let nameString = namesArray[indexPath.row]
        cell.jsonLabel.text = nameString

        return cell
    }
}

尝试并分享结果。