im using a gesture recognizer to increment votes in my backend and then using that to update the page and each cell. I am trying to link the image with the objectId as to having a way to update each images votes. issues keep coming up with my updateVote function because i cant seem to retrieve the objectId associated with the image from the backend. heres my code for the update vote and the gesture Recognizer:
var swipeRight = UISwipeGestureRecognizer(target: self, action: "respondToSwipeGesture:")
swipeRight.direction = UISwipeGestureRecognizerDirection.Right
myCell.postedImage.userInteractionEnabled = true;
myCell.postedImage.addGestureRecognizer(swipeRight)
var swipeLeft = UISwipeGestureRecognizer(target: self, action: "respondToSwipeGesture:")
swipeRight.direction = UISwipeGestureRecognizerDirection.Left
myCell.postedImage.userInteractionEnabled = true;
myCell.postedImage.addGestureRecognizer(swipeLeft)
return myCell
}
func respondToSwipeGesture(gesture: UIGestureRecognizer) {
if let swipeGesture = gesture as? UISwipeGestureRecognizer {
switch swipeGesture.direction {
case UISwipeGestureRecognizerDirection.Right:
updateVote(true, objectId: String())
println("Swiped right")
case UISwipeGestureRecognizerDirection.Left:
updateVote(false, objectId: String())
println("Swiped Left")
default:
break
}
}
}
func updateVote(increment: Bool, objectId : String) {
// Create a pointer to an object of class Posts with id 'objectId'
var object = PFObject(withoutDataWithClassName: "Post", objectId: objectId)
// Increment the current value of the quantity key by 1
if increment == true {
object.incrementKey("count", byAmount: 1)
} else {
object.incrementKey("count", byAmount: -1)
}
// Save
object.saveInBackgroundWithBlock(nil)
}
how can i retrieve the objectId because whenever i run this i keep getting the error cannot update without specific objectId? I get the println("swiped right or left") but i cant get the vote to increment how can i make that happen?
import UIKit
import Parse
class HomePage: UITableViewController {
var images = [UIImage]()
var titles = [String]()
var imageFile = [PFFile]()
var votingObjects: [PFObject] = []
var objectIds = [""]
override func viewDidLoad() {
super.viewDidLoad()
println(PFUser.currentUser())
println(PFUser.currentUser())
var query = PFQuery(className:"Post")
query.orderByDescending("createdAt")
query.limit = 15
query.findObjectsInBackgroundWithBlock {
(objects: [AnyObject]?, error: NSError?) -> Void in
if error == nil {
println("Successfully retrieved \(objects!.count) scores.")
println(objects!)
for objectRow in objects! {
let object = objectRow as! PFObject
if let objectIds = object["objectId"] as? String {
self.objectIds.append(objectIds)
}
//objectIds.append(object.objectId as? String)
// Adding them to the array
if let title = object["Title"] as? String {
self.titles.append(title)
}
if let imgFile = object["imageFile"] as? PFFile {
self.imageFile.append(imgFile)
}
self.votingObjects.append(object)
}
dispatch_async(dispatch_get_main_queue(), {
self.tableView.reloadData() // Updating the tableView on the main thread - important. Do some research on Grand Central Dispatch :)
})
} else {
println(error)
// Error
}
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return titles.count
}
override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
return 500
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
var myCell:cell = self.tableView.dequeueReusableCellWithIdentifier("myCell") as! cell
myCell.rank.text = "21"
myCell.votes.text = votingObjects[indexPath.row]["Post"] as? String
myCell.postDescription.text = titles[indexPath.row]
imageFile[indexPath.row].getDataInBackgroundWithBlock { (data, error) -> Void in
if let downloadedImage = UIImage(data: data!) {
myCell.postedImage.image = downloadedImage
}
}
this is the rest of my code on that page how can i retrieve an objectId from the array?
import UIKit
import Parse
import Foundation
class cell: UITableViewCell {
@IBOutlet weak var rank: UILabel!
@IBOutlet weak var votes: UILabel!
@IBOutlet weak var postedImage: UIImageView!
@IBOutlet weak var creditLink: UIButton!
@IBOutlet weak var addButton: UIButton!
@IBOutlet weak var postDescription: UITextView!
}
my cell class
