如何在 Parse 中获取图像，单元格名称有效但图像不加载

Question

我可以从 parse 加载图片，但是它们有代号，我想在单元格中显示图片，请不要加载图片！

//
import UIKit
import Parse
import Bolts

class LojasViewController: UIViewController, UITableViewDelegate {
    var ParseData = [PFObject]()
    var ParseImages = [PFFile]()

    @IBOutlet weak var saloesTableView: UITableView!

    override func viewDidLoad() {
        super.viewDidLoad()

        // Retrieving Parse Information
        var query = PFQuery(className:"Saloes")
        query.orderByAscending("nome")
        query.findObjectsInBackgroundWithBlock {
            (objects: [AnyObject]?, error: NSError?) -> Void in

            if error == nil {
                // The find succeeded.
                println(objects!.count)

                // Do something with the found objects
                if let objects = objects as? [PFObject] {
                    self.ParseData = objects

                    println(self.ParseData.count)
                    self.saloesTableView.reloadData()
                    for object in objects {

                        println(object["nome"])
                        println(object["cidade"])
                        println(object["imagemCelula"])
                        println(object["endereco"])
                        println(object["GeoPonto"])
                        println(object["telefone"])
                        println(object["celular"])
                        println(object["texto"])
                        println(object["Imagem1"])
                        println(object["Imagem2"])
                        println(object["Imagem3"])
                        println(object["Imagem4"])
                        println(object["Imagem5"])
                        println(object["Imagem6"])
                        println(object["Imagem7"])
                        println(object["Imagem8"])
                        println(object["Imagem9"])
                        }
                    }
                } else {

                // Log details of the failure
                println("Error: \(error!) \(error!.userInfo!)")
            }
        }
        }

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

    // Esconde statusBar
    override func prefersStatusBarHidden() -> Bool {
        return true
    }

    @IBAction func voltarButton(sender: AnyObject) {
        self.dismissViewControllerAnimated(true, completion: nil)
    }

    func loadData () {
    }

    // MARK: - Table view data source ____________________________________

    func numberOfSectionsInTableView(tableView: UITableView!) -> Int
    {
        return 1
    }

    func tableView(tableView: UITableView!, numberOfRowsInSection section: Int) -> Int
    {
        return ParseData.count
    }

    func tableView(tableView: UITableView?, cellForRowAtIndexPath indexPath: NSIndexPath?) -> UITableViewCell?
    {
        let cell:SaloesTableViewCell = tableView!.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath!) as! SaloesTableViewCell

            cell.nomeSalao.text = ParseData[indexPath!.row]["nome"] as? String

            let imagemCelula = ParseData[indexPath!.row]["imagemCelula"] as! PFFile

        return cell
    }

    func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    }

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject!) {
    }
}

Answer 1

您可以使用 findObjectsInBackgroundWithBlock 获取 Parse 对象。但是一旦你有了图像的解析对象，你需要通过调用 getDataInBackgroundWithBlock.

下载实际文件

这是您的代码：

我更新了 ParseImages，它现在是一个 NSData 数组。

我实现了getDataInBackgroundWithBlock。

我从您从 Parse 检索到的图像中为 imagemCelula 分配了一个 UIImage。

让我知道它是如何工作的

import UIKit
import Parse
import UIKit
import Parse
import Bolts

class LojasViewController: UIViewController, UITableViewDelegate {
var ParseData = [PFObject]()
var ParseImages: [NSData] = []

@IBOutlet weak var saloesTableView: UITableView!

override func viewDidLoad() {
    super.viewDidLoad()

    // Retrieving Parse Information
    var query = PFQuery(className:"Saloes")
    query.orderByAscending("nome")
    query.findObjectsInBackgroundWithBlock {
        (objects: [AnyObject]?, error: NSError?) -> Void in

        if error == nil {
            // The find succeeded.
            println(objects!.count)

            // Do something with the found objects
            if let objects = objects as? [PFObject] {
                self.ParseData = objects

                println(self.ParseData.count)
                self.saloesTableView.reloadData()
                for object in objects {
                    object.getDataInBackgroundWithBlock({ (parseImageData, error) -> Void in
                if (error == nil) {
                    let thatImageData: NSData = parseImageData
                    ParseImages.append(thatImageData)

                        println(object["nome"])
                        println(object["cidade"])
                        println(object["imagemCelula"])
                        println(object["endereco"])
                        println(object["GeoPonto"])
                        println(object["telefone"])
                        println(object["celular"])
                        println(object["texto"])
                        println(object["Imagem1"])
                        println(object["Imagem2"])
                        println(object["Imagem3"])
                        println(object["Imagem4"])
                        println(object["Imagem5"])
                        println(object["Imagem6"])
                        println(object["Imagem7"])
                        println(object["Imagem8"])
                        println(object["Imagem9"])
} else {
println("failed to load images")
}
                        }
                    }
                } else {
            // Log details of the failure
            println("Error: \(error!) \(error!.userInfo!)")
        }
    }
    }

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

// Esconde statusBar
override func prefersStatusBarHidden() -> Bool {
    return true
}

@IBAction func voltarButton(sender: AnyObject) {
    self.dismissViewControllerAnimated(true, completion: nil)
}

func loadData () {
}

// MARK: - Table view data source ____________________________________

func numberOfSectionsInTableView(tableView: UITableView!) -> Int
{
    return 1
}

func tableView(tableView: UITableView!, numberOfRowsInSection section: Int) -> Int
{
    return ParseData.count
}

func tableView(tableView: UITableView?, cellForRowAtIndexPath indexPath: NSIndexPath?) -> UITableViewCell?
{
    let cell:SaloesTableViewCell = tableView!.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath!) as! SaloesTableViewCell

        cell.nomeSalao.text = ParseData[indexPath!.row]["nome"] as? String

        let imagemCelula = UIImage(data: ParseImages[indexPath!.row])

    return cell
}

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
}

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject!) {
}
}

如何在 Parse 中获取图像，单元格名称有效但图像不加载

How get images in Parse, Cell name works but images don't load

parsing

get

image

tableview

swift