Question

所以就像标题说我从解析中获取信息并显示它但我无法弄清楚如何用日期来做这件事。我需要将它覆盖到String以显示在标签中。我已经做了一些或研究，并了解我将需要使用日期格式化程序，但我不明白的是我把它放在哪里，一旦它格式化我如何显示它。任何帮助将非常感激！

var names = [String]()
var locations = [String]()
var dates = [NSDate]()
var imageFiles = [PFFile]()
var abouts = [String]()

override func viewDidLoad() {
    super.viewDidLoad()

    refresher = UIRefreshControl()
    refresher.attributedTitle = NSAttributedString(string: "Pull to refresh")
    refresher.addTarget(self, action: "refresh", forControlEvents: UIControlEvents.ValueChanged)
    self.tableView.addSubview(refresher)
    refresh()

    PFGeoPoint.geoPointForCurrentLocationInBackground { (geoPoint, error) -> Void in
        if let geoPoint = geoPoint {
            PFUser.currentUser()?["location"] = geoPoint
            PFUser.currentUser()?.saveInBackground()

    var getLocalPostsQuery = PFQuery(className: "publicPosts")
    if let latitude = PFUser.currentUser()!["location"].latitude {
        if let longitude = PFUser.currentUser()!["location"].longitude {
    getLocalPostsQuery.whereKey("searchLocation", withinGeoBoxFromSouthwest: PFGeoPoint(latitude: latitude - 0.5, longitude: longitude - 0.5), toNortheast:  PFGeoPoint(latitude: latitude + 0.5, longitude: longitude + 0.5))
    getLocalPostsQuery.findObjectsInBackgroundWithBlock { (objects, error) -> Void in
        if let objects = objects {

                self.names.removeAll(keepCapacity: true)
                self.locations.removeAll(keepCapacity: true)
                self.abouts.removeAll(keepCapacity: true)
                self.dates.removeAll(keepCapacity: true)
                self.imageFiles.removeAll(keepCapacity: true)

                for object in objects {

                    self.names.append(object["name"] as! String)
                    self.locations.append(object["location"] as! String)
                    self.dates.append(object["date"] as! String)
                    self.abouts.append(object["about"] as! String)
                    self.imageFiles.append(object["imageFile"] as! PFFile)
                    //self.attendings.append(object["attending"].count)
                    self.tableView.reloadData()
                            }
                        }
                    }
                }
            }
        }
    }
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

// MARK: - Table view data source

override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
    // #warning Incomplete implementation, return the number of sections
    return 1
}

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    // #warning Incomplete implementation, return the number of rows
    return names.count
}


override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let LECell = tableView.dequeueReusableCellWithIdentifier("LocalPostsCell", forIndexPath: indexPath) as! LocalPostsTableViewCell

    imageFiles[indexPath.row].getDataInBackgroundWithBlock { (data, error) -> Void in
        if let downloadedImage = UIImage(data: data!) {

            LECell.postImage.image = downloadedImage
        }
    }


    LECell.postName.text = names[indexPath.row]
    LECell.postLocation.text = locations[indexPath.row]
    LECell.postDate.text = dates[indexPath.row]

    return LECell
}

let localPostsDetailSegue = "showLocalPostsDetailView"

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == localPostsDetailSegue {
        let detailScene = segue.destinationViewController as! LocalPostsDetailViewController

        if let indexPath = self.tableView.indexPathForSelectedRow {
            let row = Int(indexPath.row)
            detailScene.name = names[row]
            detailScene.location = locations[row]
            detailScene.date = dates[row]
            detailScene.about = abouts[row]
            detailScene.photo = imageFiles[row]
        }
    }
}
}

Answer 1

您可以轻松地从NSDate获取字符串并显示它。

func getStringFromDate(date:NSDate)->String{

let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "MM/dd/yy, H:mm"
return dateFormatter.stringFromDate(yourDate) // yourDate is your parse date
}

你也可以制作一个类别。

Answer 2

斯威夫特3：

 func getFormattedDate(string: String) -> String{


 let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss +zzzz" // 2017-04-20T09:40:30+0000
        let formateDate = dateFormatter.date(from: string)!
        dateFormatter.dateFormat = "dd-MM-yyyy"
        return dateFormatter.string(from: formateDate)
        }
    let CreatedDates = "\(Date.getFormattedDate(string: "\(records["creationDate"]!)"))"
print("Date : \(CreatedDates)")
        //OutPut 
         20-04-2017

从解析和显示到字符串Swift获取日期

2 个答案: