swift/parse: error when setting Parse data to labels - swift

Question

What I am trying to do is to have data from Parse be retrieved from columns by object order. All labels are connected to their respective outlets and all of the outputs retrieve their correct data.
When I run it and open a cell in the tableview it crashes and gives me Thread 1: EXC_BAD_INSTRUCTION (code=EXC>I386_INVOP, subcode=0x0) on this line: self.navBar.topItem?.title = output1 if I select the first cell, and then on this line: self.navBar.topItem?.title = output1b if I select the second cell.
Here is the full function:
firstObject is grabbing the first object in the "eventsdetail" column
secondObject is grabbing the second object in the "eventsdetail" column
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
var query = PFQuery(className: "eventsdetail")
let runkey = query.orderByAscending("ID")
runkey.findObjectsInBackgroundWithBlock {
(objects: [PFObject]?, error : NSError?) -> Void in
if error == nil {
if let objects = objects as [PFObject]! {
for object in objects {
var firstObject = objects[0]
var secondObject = objects[1]
let output1 = firstObject.objectForKey("navTitle") as! String!
let output2 = firstObject.objectForKey("articleTitle") as! String!
let output3 = firstObject.objectForKey("written") as! String!
let output4 = firstObject.objectForKey("date") as! String!
let output5 = firstObject.objectForKey("article") as! String!
let output1b = secondObject.objectForKey("navTitle") as! String!
let output2b = secondObject.objectForKey("articleTitle") as! String!
let output3b = secondObject.objectForKey("written") as! String!
let output4b = secondObject.objectForKey("date") as! String!
let output5b = secondObject.objectForKey("article") as! String!
if indexPath.row == 0 {
self.performSegueWithIdentifier("0a", sender: nil)
self.tableview.deselectRowAtIndexPath(indexPath, animated: true)
self.navBar.topItem?.title = output1
self.articleTitle.text = output2
self.writtenBy.text = output3
self.date.text = output4
self.article.text = output5
} else if indexPath.row == 1 {
self.performSegueWithIdentifier("0a", sender: nil)
self.tableview.deselectRowAtIndexPath(indexPath, animated: true)
self.navBar.topItem?.title = output1b
self.articleTitle.text = output2b
self.writtenBy.text = output3b
self.date.text = output4b
self.article.text = output5b
}
}
}
}
}
}
If there is an easier way of doing this, please mention it, if not try to just solve this method's problem. I know it isn't the cleanest way of doing things.

Answer 1

I am not sure of how you Parse your data but if it can help you, here's how I would do:
//
// Test.swift
// Test
//
// Created by Charles-Olivier Demers on 16-01-04.
//
import UIKit
//import Parse
class EventViewController: UIViewController, UITableViewDelegate {
private var _info = [EventDetails]()
override func viewDidLoad() {
fetchData()
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
self.performSegueWithIdentifier("0a", sender: nil)
self.tableview.deselectRowAtIndexPath(indexPath, animated: true)
self.navBar.topItem?.title.text = _info[indexPath.row].navTitle()
self.articleTitle.text = _info[indexPath.row].articleTitle()
self.writtenBy.text = _info[indexPath.row].writtenBy()
self.date.text = _info[indexPath.row].date()
self.article.text = _info[indexPath.row].article()
}
func fetchData() {
let query = PFQuery(className: "eventsDetails")
query.orderByAscending("ID")
query.findObjectsInBackgroundWithBlock { (objects: [PFObject]?, error: NSError?) -> Void in
if error == nil {
if let objects = objects {
for object in objects {
let navTitleObject = object["navTitle"] as! String
let articleTitleObject = object["articleTitle"] as! String
let writtenByObject = object["writtenByObject"] as! String
let dateObject = object["dateObject"] as! String
let articleObject = object["articleObject"] as! String
_info.append(EventDetails(navTitle: navTitleObject, articleTitle: articleTitleObject, writtenBy: writtenByObject, date: dateObject, article: articleObject))
}
}
}
else {
print("Error #\(error!.code)")
}
}
}
}
class EventDetails {
private var _navTitle: String!
private var _articleTitle: String!
private var _writtenBy: String!
private var _date: String!
private var _article: String!
init(navTitle: String, articleTitle: String, writtenBy: String, date: String, article: String) {
self._navTitle = navTitle
self._article = articleTitle
self._writtenBy = writtenBy
self._date = date
self._article = article
}
func navTitle() -> String {
return _navTitle
}
func articleTitle() -> String {
return _articleTitle
}
func writtenBy() -> String {
return _writtenBy
}
func date() -> String {
return _date
}
func article() -> String {
return _article
}
}
First of all, I would create a class named EventDetails. This class will take all the property of EventsDetails class on Parse. So when you fetch your data, you append the data you fetch in an array of EventDetails class in Swift.
After that in your
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath)
you take the value in your EventDetails array with the indexPath.row and you fill your Table View.
That is how I would do.