download and save a PFFile (UIImage) to show in a UIImageView : SWIFT - swift

Question

I have a large class called "Goal" in parse. This class has multiple elements, one of which is a PFFile, that is always a UIImage.
When I perform my query for the "Goal" class, I cannot figure out how to take the PFFile, and change it to a UIImage for use.
var query = PFQuery(className:"Goal")
let currentUser = PFUser.currentUser()!.username
query.whereKey("creator", equalTo: currentUser!)
query.findObjectsInBackgroundWithBlock {
(objects: [AnyObject]?, error: NSError?) -> Void in
if error == nil {
// The find succeeded.
println("Successfully retrieved \(objects?.count) goals for the TableView.")
// Do something with the found objects
if let objects = objects as? [PFObject] {
for object in objects {
let goalType = object["type"] as! String
let goalPeriod = object["period"] as! String
let goalCategory = object["category"] as! String
let goalShortDescription = object["shortDescription"] as! String
let goalLongDescription = object["longDescription"] as! String
let goalPointvalue = object["pointValue"] as! Int
let goalSharedSetting = object["shared"] as! Bool
let goalAdoptionCount = object["adoptionCount"] as! Int
let goalIsComplete = object["isComplete"] as! Bool
let goalSuccessImageData = object["image"] as! PFFile
goalSuccessImageData.getDataInBackgroundWithBlock {
(imageData: NSData?, error: NSError?) -> Void in
if error == nil {
if let imageData = imageData {
let image = UIImage(data:imageData)
self.imageQuery = image
}
}
}
let goalSuccessImage : UIImage = self.imageQuery
let goalObjectID = object.objectId
let goalSpreadCount = object["spreadCount"] as! Int
let goalSpreadTotal = object["spreadTotal"] as! Int
let goalTotalCompletions = object["totalCompletions"] as! Int
let thisGoal = GoalModel(period: goalPeriod, type: goalType, category: goalCategory, shortDescription: goalShortDescription, longDescription: goalLongDescription, pointValue: goalPointvalue, shared: goalSharedSetting, adoptionCount: goalAdoptionCount, isComplete: goalIsComplete, successImage: goalSuccessImage, goalID: goalObjectID!, spreadCount: goalSpreadCount, spreadTotal: goalSpreadTotal, totalCompletions: goalTotalCompletions ) as GoalModel
any tips on how to modify the "success image" part? I added a space before and after to make it easier to find.
Thank you in advance!

Answer 1

I'm using this way in my projects, if it help's you :
func performSave(sender: UIBarButtonItem){
affichageActivityIndicator()
let qos = Int(QOS_CLASS_USER_INITIATED.value)
dispatch_async(dispatch_get_global_queue(qos,0)) { () -> Void in
dispatch_async(dispatch_get_main_queue()){
if let updateObject = self.currentObject as PFObject? {
let imageData = UIImageJPEGRepresentation(imageToSave, 0.1)
let imageFile = PFFile(name:"image.png", data:imageData)
updateObject["imageFile"] = imageFile
// Save the data back to the server in a background task
updateObject.saveInBackgroundWithBlock{(success: Bool, error: NSError!) -> Void in
UIApplication.sharedApplication().endIgnoringInteractionEvents()
if success == false {
println("Error")
}
}
}
}
}
}