PFFile Image cache in Swift 2.0 - swift

Question

I am getting image as PFFile. but when my table is scrolling every time PFFile is downloading and its take time.
I want to cache my file so if its will be downloaded then it will get from cache not from the Parse.
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
var cell = tableView.dequeueReusableCellWithIdentifier("cell") as! RidesCustomCell!
if cell == nil {
cell = RidesCustomCell(style: UITableViewCellStyle.Default, reuseIdentifier: "cell")
}
let currentDic = dataArray.objectAtIndex(indexPath.row) as! NSDictionary
cell.backgroundColor = UIColor.clearColor()
cell.txtName.text = currentDic.valueForKey("firstName") as? String
cell.txtPrice.text = currentDic.valueForKey("price") as? String
cell.txtTime.text = currentDic.valueForKey("date")as? String
cell.txtFrom.text = currentDic.valueForKey("from") as? String
cell.txtTo.text = currentDic.valueForKey("to") as? String
print(currentDic)
cell.imgUser.image = UIImage(named: "noImg.png")
if (currentDic.valueForKey("imageFile") != nil){
// let userImageFile = currentDic.valueForKey("imageFile") as! PFFile
let queue : dispatch_queue_t = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)
dispatch_async(queue, { () -> Void in
print(currentDic)
let pfuserGet = currentDic.valueForKey("user") as! PFUser
print(pfuserGet.username)
print(pfuserGet.email)
print(pfuserGet.password)
let userImageFile = pfuserGet.objectForKey("profilePicture") as! PFFile
userImageFile.getDataInBackgroundWithBlock {
(imageData: NSData?, error: NSError?) -> Void in
if error == nil {
if let imageData = imageData {
let image = UIImage(data:imageData)
cell.imgUser.image = image
}
}
}
})
}
return cell;
}

Answer 1

I had a look at your code. The issue is the PFFile.getDataInBackground() now since you are using dictionaries I would get the PFFile inside your PFQuery block and and store it in the dictionary as UImage() instead of a PFFile.
And all you have to do in the cellForRowAtIndexPath is load the image from the dictionary.
I think this will solve your problem