swift - 如何在表格 View 单元格swift 3中将当前时间添加到标签

Question

我有一个添加按钮，可将您带到一个新 View ，其中包含用于添加信息的文本输入。一旦你点击添加按钮，它就会带你回到表格 View 并将所有输入添加到标签中。我无法将当前时间放入我制作的 dateStamp 标签中。谁能帮忙？

主 Controller

 var dateStamp = Date()
 var clientName = [""]
 var projecDescript = [""]

// Custom cell to make all input fields custom
class CustomCell: UITableViewCell {
    //Make your outlets here, connect the outlets from cell in your storyboard

    @IBOutlet var clientNameLabel: UILabel!
    @IBOutlet var descriptionLabel: UILabel!
    @IBOutlet var dateStamp: UILabel!

}

class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

    @IBOutlet var clientTableList: UITableView!

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return (clientName.count)
        return (projecDescript.count)
    }

    // This is the new items added into the inputs
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
    {
        let cell = tableView.dequeueReusableCell(withIdentifier: "clientCell", for: indexPath) as! CustomCell

        // Adds Clients Name
        let companyName = clientName[indexPath.row]
        cell.clientNameLabel?.text = companyName

        // Adds Clients Description
        let descriptionName = projecDescript[indexPath.row]
        cell.descriptionLabel?.text = descriptionName



        return cell
    }

    func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
        return true
    }

    override func viewDidAppear(_ animated: Bool) {
        clientTableList.reloadData()
    }

第二 Controller

import UIKit

class AddInvoice: UIViewController {

    @IBOutlet var clientNameInput: UITextField!
    @IBOutlet var descriptionNameInput: UITextView!



    @IBAction func addInvoice(_ sender: Any) {

        if clientNameInput.text != "" && descriptionNameInput.text != "" 
        {
            clientName.append(clientNameInput.text!)
            //clientInput.text = ""

            projecDescript.append(descriptionNameInput.text!)
            //descriptionFieldInput.text = ""


            _ = navigationController?.popViewController(animated: true)
        }  
    }
}

Answer 1

let timeStamp = "\(DateFormatter.localizedString(from: Date(), dateStyle: .long, timeStyle: .long))"

如果您想将格式转换为截至今日

只需将日期传递给该函数，它就会返回一个字符串，表示 3 周前

func relativePast(for date : Date) -> String {

    let units = Set<Calendar.Component>([.year, .month, .day, .hour, .minute, .second, .weekOfYear])
    let components = Calendar.current.dateComponents(units, from: date, to: Date())

    if components.year! > 0 {
        return "\(components.year!) " + (components.year! > 1 ? "years ago" : "year ago")

    } else if components.month! > 0 {
        return "\(components.month!) " + (components.month! > 1 ? "months ago" : "month ago")

    } else if components.weekOfYear! > 0 {
        return "\(components.weekOfYear!) " + (components.weekOfYear! > 1 ? "weeks ago" : "week ago")

    } else if (components.day! > 0) {
        return (components.day! > 1 ? "\(components.day!) days ago" : "Yesterday")

    } else if components.hour! > 0 {
        return "\(components.hour!) " + (components.hour! > 1 ? "hours ago" : "hour ago")

    } else if components.minute! > 0 {
        return "\(components.minute!) " + (components.minute! > 1 ? "minutes ago" : "minute ago")

    } else {
        return "\(components.second!) " + (components.second! > 1 ? "seconds ago" : "second ago")
    }
}