Get data from Parse.com to swift

Question

In my code it receives the images from parse, and show it in a imageView. Here is the code:

http://pastebin.com/kDjAgPRT

If needed, here is my code for upload:

func uploadPost(){
        var imageText = self.imageText.text

        if (imageView.image == nil){
            println("No image uploaded")
        }
        else{
            var posts = PFObject(className: "Posts")
            posts["imageText"] = imageText
            posts["uploader"] = PFUser.currentUser()
            posts.saveInBackgroundWithBlock({ (success: Bool, error: NSError?) -> Void in
                if error == nil{
                    //**Success saving, now save image.**//

                    // Create an image data
                    var imageData = UIImagePNGRepresentation(self.imageView.image)
                    // Create a parse file to store in cloud
                    var parseImageFile = PFFile(name: "upload_image2.png", data: imageData)
                    //var parseImageFile = PFFile(data: imageData)
                    posts["imageFile"] = parseImageFile
                    posts.saveInBackgroundWithBlock({ (success: Bool, error: NSError?) -> Void in
                        if error == nil{
                            // Take user home
                            println(success)
                            println("Data uploaded")
                        }
                        else{
                            println(error)
                        }
                    })
                }
                else{
                    println(error)
                }
            })
        }
    }

As you can see, here is my Parse inside "Posts":

How can i also get "imageText", "uploader" and "createdAt" for the images? Like instagram has.

so everything is good when you are saving right ,just want to get them back to your tableView — Lamour
– Lamour, Commented Aug 18, 2015 at 19:29
@Lamar - Yes, correct. But not table view, i am using CollectionView. — Eri-Sklii
– Eri-Sklii, Commented Aug 18, 2015 at 19:48

Lamour · Accepted Answer · 2015-08-18 19:49:08Z

1

Try this:

struct Details {
var username:String!
var text:String!
var CreatedAt:NSDate!
var image:UIImage!
init(username:String,text:String,CreatedAt:NSDate,image:UIImage){

    self.username = username
    self.text = text
    self.CreatedAt = CreatedAt
    self.image = image
   }
} 

func QueryImagesFromParse(){

   var arrayOfDetails = [Details]()

var query = PFQuery(className: "Posts")
query.findObjectsInBackgroundWithBlock { (objects:[AnyObject]?, error:NSError?) -> Void in
    if error == nil
    {
        if let newObjects = objects as? [PFObject] {

            for oneobject in newObjects {
                 var text = oneobject["imageText"] as! String
                 var username = oneobject["uploader"] as! String
                  var time = oneobject.createdAt
                  var userImageFile = oneobject["imageFile"] as! PFFile
                userImageFile.getDataInBackgroundWithBlock({ (imageData:NSData?, error:NSError?) -> Void in
                    if error == nil {
                       let newImage = UIImage(data: imageData!)

                         var OneBigObject = Details(username: username, text: text, CreatedAt: time!, image: newImage!)
                          arrayOfDetails.append(OneBigObject)
                         // then reloadData


                    }
                  })

            }

        }
      }
  }
 }

SO NOW with the arrayOfDetails you could populate your cells...

answered Aug 18, 2015 at 19:49

Lamour

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15 Comments

Eri-Sklii Over a year ago

Hm, when i run this it runs without error, but i get Thread error: "Could not cast value of type 'PFUser' (0x1001852b0) to 'NSString' (0x195d99768).", on line: "var username = oneobject["uploader"] as! String". Updated code: pastebin.com/S5F4RF2M

Lamour Over a year ago

I see what is going on so you know what you should create a column with the username and called uploader into parse ... then in your upload code you should save the currentUser.username.... this is an easy way out you don't have to deal with Pointer

Eri-Sklii Over a year ago

Ok, now there is no errors, but there is no images showing up..?

Lamour Over a year ago

why not did you retrieve the username and text and date ?

Lamour Over a year ago

Starting from line 86 ... you should not use that array because your data are inside of ** arrayOfDetails** , And I assume that your custom cell has three UILablel and one imageView .. so var post = arrayOfDetails[indexPath.row] then cell.label.text = post.username so on

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