import UIKit

class MessageDetailViewController: UIViewController {

    @IBOutlet weak var tableview: UITableView!
    
    struct data{
        let time: String
        let message: String
        let date: String
        let type: String
    }
    
    struct section {
        let date: String
        var array = [data]()
    }
    
    let sectionArray = [
        section(date: "yesterday", array: [
            data(time: "3:30 PM", message: "I am looking for your service, can you please give more information on that.", date: "yesterday", type: "sender"),
            data(time: "3:40 PM", message: "Sure i am here to help you", date: "yesterday", type: "receiver")
            ]),
        section(date: "today", array: [data(time: "4:40 PM", message: "Ok, I wil contact you on your phone for that.", date: "today", type: "sender")])
    ]
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        self.tableview.register(UINib(nibName: "SenderCell", bundle: nil), forCellReuseIdentifier: "SenderCell")
        self.tableview.register(UINib(nibName: "ReceiverCell", bundle: nil), forCellReuseIdentifier: "ReceiverCell")
        self.tableview.register(UINib(nibName: "customHeaderViewCell", bundle: nil), forCellReuseIdentifier: "customHeaderViewCell")
    }
}

extension MessageDetailViewController: UITableViewDelegate, UITableViewDataSource{
    
    func numberOfSections(in tableView: UITableView) -> Int {
        return sectionArray.count
    }
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return sectionArray.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
         if sectionArray[indexPath.section].array[indexPath.row].type == "sender"
        {
            let cell = tableview.dequeueReusableCell(withIdentifier: "SenderCell", for: indexPath) as! SenderCell
            cell.setData(reciverTime: sectionArray[indexPath.section].array[indexPath.row].time, reciverMsg: sectionArray[indexPath.section].array[indexPath.row].message)
            return cell
        }
        else
        {
            let cell = tableView.dequeueReusableCell(withIdentifier: "ReceiverCell", for: indexPath) as! ReceiverCell
            cell.setData(reciverTime: sectionArray[indexPath.section].array[indexPath.row].time, reciverMsg: sectionArray[indexPath.section].array[indexPath.row].message)
            return cell
        }
    }
    
    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        return 100
    }
    
    func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
    
        let headerView = UIView()
        let headerCell = tableView.dequeueReusableCell(withIdentifier: "customHeaderViewCell") as! customHeaderViewCell
        if sectionArray[section].date == "yesterday"{
            headerCell.labelHeader.text = "yesterday"
        }
        else{
            headerCell.labelHeader.text = "today"
        }
        headerView.addSubview(headerCell)
        return headerView
    }
}

This is my message detail code.

I want to achieve these

But through these array I achieved these

what changes should I do in my code so that I can get same day message in one section

this ---

sectionArray.append(section(date: "yesterday", array: [data(time: "3:40 PM", message: "SURE i am here to help you", date: "yesterday", type: "receiver")]))

Making a new section I don't want to make new section when sure I am here o help you array comes.

CodePudding user response：

As I've seen your code, you're using String to indicate the day of the message which is bad practice. Instead, you should use Date, which will help you group the messages by date:

let sectionArray = messages.reduce(into: [section]()) { result, element in
    if let section = result.firstIndex(where: {Calendar.current.isDate($0.date, inSameDayAs: element.date)}) {
        result[section].append(element)//append message to section
    }else {
        //create new section
    }
}

If you really need to use String, use this:

let sectionArray = messages.reduce(into: [section]()) { result, element in
    if let section = result.firstIndex(where: {$0.date == element.date}) {
        result[section].append(element)//append message to section
    }else {
        //create new section
    }
}