从 Parse 下载 PFFile (Image) 将其附加到数组并用该数组 (Swift) 填充 UIImageView

Downloading PFFile (Image) from Parse append it to array and fill UIImageView with that array (Swift)(从 Parse 下载 PFFile (Image) 将其附加到数组并用该数组 (Swift) 填充 UIImageView)

问题描述

我在解析和 swift 方面遇到问题，希望您能帮助我:)

I have a problem with parse and swift and i hope you can help me :)

我正在从 Parse 下载字符串和 PFfile，并希望将其添加到数组中(这工作正常).

I'm downloading strings and PFfiles from Parse and want to add it to an array (this works fine).

然后我想用字符串数组填充一个标签(也可以正常工作)和一个带有 PFFile 数组的 UIImageView，它也是一个图像.

Then I want to fill a Label with the string array (works fine as well) and an UIImageView with the PFFile array which is also an Image.

但我总是得到一个错误:

But I always get an error:

PFFile 不能转换为UIImage"

PFFile is not convertible to "UIImage

但我不知道如何转换此 PFFile 以便可以将其与 UIImage 视图一起使用.

But I have no clue how I can convert this PFFile so that I can use it with the UIImage View.

var titles = [String] ()

var fragenImages = [PFFile] ()

@IBOutlet weak var fragenIm: UIImageView!


@IBOutlet weak var fragenFeld: UILabel!



  override func viewDidAppear(animated: Bool) {


    var query = PFQuery(className:"Post")

    query.whereKey("user", notEqualTo: PFUser.currentUser().username)
    query.limit = 5

    query.findObjectsInBackgroundWithBlock{
        (objects: [AnyObject]!, error: NSError!) -> Void in

        if error == nil {



            for object in objects {

         self.titles.append(object["title"] as String)
         self.fragenImages.append(object["imageFile"] as PFFile)


            }



        self.fragenFeld.text = self.titles[0]
        self.fragenIm.image = self.fragenImages[0]





        }

            else {

            println(error)
            }

        }



}

推荐答案

Daniel，图片不是文件，技术上它们是，但您将它们引用为数据而不是 PFObjects 或 PFFiles.因此，基本上获取文件的数据并像往常一样应用:您只是错过了一个简单的步骤:

Daniel, pictures aren't files, technically they are, but you reference them as Data not PFObjects or PFFiles. So, essentially get the Data of the file and apply as you normally would: You just missed a simple step:

for object in objects {
  let userPicture = object["imageFile"] as PFFile
  userPicture.getDataInBackgroundWithBlock({ // This is the part your   overlooking
  (imageData: NSData!, error: NSError!) -> Void in
    if (error == nil) {
      let image = UIImage(data:imageData)
      self.fragenImages.append(image)
    }
  })
}

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