快速解析-取消固定表格视图单元格中的项目

Question

i would like to unpin an item that is in my tableview cell from parse. I save the object on another page, and query it in the main page, add that object to an array so it can be displayed in the table view. Now im not sure how to correctly select the corresponding parse object with whats in the array so that i can unpin it.

ideally i'd like to do this using the objectId just in case a user saves an object with the same name. how can i grab the objectId of whats displaying in my cell, and unpin it?

what query i use to add my objects to the array to then be displayed in my table view

var selectedLighthouse: localData? = nil


var arrayToPopulateCells = [localData]()


override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib
    //query
        let query = PFQuery(className: "ParseLighthouse")

        query.fromLocalDatastore()
        query.whereKey("User", equalTo: PFUser.currentUser()!)
        query.findObjectsInBackgroundWithBlock { (objects, error) -> Void in
            if error == nil {
                // The find succeeded.
                println("Successfully retrieved \(objects!.count) lighthouses.")
                // Do something with the found objects
                if let lighthouse = objects {

                    self.arrayToPopulateCells.removeAll(keepCapacity: true)

                    for object in lighthouse {

                        var singleData = localData()
                        singleData.name = object["Name"] as! String
                        singleData.note = object["Note"] as! String
                        singleData.date = object["Date"] as! String
                        singleData.latt = object["Latt"] as! NSNumber
                        singleData.longi = object["Longi"] as! NSNumber
                        singleData.lattDelta = object["LattDelta"] as! NSNumber
                        singleData.longiDelta = object["LongiDelta"] as! NSNumber
                        singleData.locality = object["Locality"] as! String


                        self.arrayToPopulateCells.append(singleData)

                    }

                }
            } else {
                // Log details of the failure
                println("Error: \(error!) \(error!.userInfo!)")
            }

        }
    //setting table view datasource and delegate.
    self.tableView.dataSource = self
    self.tableView.delegate = self

    var currentUser = PFUser.currentUser()
    println(currentUser)


}




func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {



    // var lighthouse = self.lighthouses[indexPath.row]
    var data = self.arrayToPopulateCells[indexPath.row]

    //setting the prototype cell to link with the identifier set in attributes earlier.
    let cell = tableView.dequeueReusableCellWithIdentifier("locationCell") as! lighthouseCell

    let row = indexPath.row
    cell.cellName.text = data.name
    cell.cellPlace.text = data.locality
    // cell.cellCoordinates.text = "\(lighthouse.latt)" + ", " + "\(lighthouse.longi)"
    // cell.cellNote.text = lighthouse.note
    cell.cellDate.text = "\(data.date)"

    return cell
}






func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    self.selectedLighthouse = self.arrayToPopulateCells[indexPath.row]
    self.performSegueWithIdentifier("lighthouseDetailViewSegue", sender: self)
}



func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
    return true
}

func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
    if (editingStyle == UITableViewCellEditingStyle.Delete) {
        var arrayObjectId = localData()
        var queryLocal = PFQuery(className:"ParseLighthouse")
        queryLocal.fromLocalDatastore()
        queryLocal.whereKey("Name", equalTo: arrayObjectId.name)
        queryLocal.getObjectInBackgroundWithId(arrayObjectId.name) {
            (parseLighthouse: PFObject?, error: NSError?) -> Void in
            if error == nil && parseLighthouse != nil {
                parseLighthouse?.unpinInBackground()
            } else {
                println(error)
            }
        }
        self.arrayToPopulateCells.removeAtIndex(indexPath.row)
        tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
    }
}

Answer 1

In the commitediting() method you don't need to query again because your array already has all the data from parse so you just need to delete straight from the array then reloadData().

You just need:

if (editingStyle == UITableViewCellEditingStyle.Delete)
{
  var object:PFObject = self.arrayToPopulateCells[indexPath.row] as! PFObject
 object.deleteInBackgroundWithBlock() // so check the if error == nil 
 self.arrayToPopulateCells.removeAtIndex(indexPath.row)
 tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
 self.tableView.reloadData()
 }