Send array by segue to new view controller swift iOS 9 - ios

Question

I am attempting to send an array of data to a new view controller and I'm currently getting the error fatal error: unexpectedly found nil while unwrapping an Optional value
Im using the API data from www.thecocktaildb.com
Example:
http://www.thecocktaildb.com/api/json/v1/1/search.php?s=margarita
Not sure what I'm doing wrong. Tried debugging and checking values before the segue in my search view controller and they're accurate.
Heres my code:
Main Storyboard
SearchViewController
class SearchViewController: UIViewController, UISearchBarDelegate, UITableViewDataSource, UITableViewDelegate {
#IBOutlet weak var TableView: UITableView!
#IBOutlet weak var SearchBar: UISearchBar!
var valueToPass:Drinks!
var isSearching : Bool = false
class Drinks {
var idDrink: Int = 0
var strDrink: String = ""
var strCategory: String = ""
var strAlcoholic: String = ""
var strGlass: String = ""
var strInstructions: String = ""
var strDrinkThumb: String = ""
var strIngredient1: String = ""
var strIngredient2: String = ""
var strIngredient3: String = ""
var strIngredient4: String = ""
var strIngredient5: String = ""
var strIngredient6: String = ""
var strIngredient7: String = ""
var strIngredient8: String = ""
var strIngredient9: String = ""
var strIngredient10: String = ""
var strIngredient11: String = ""
var strIngredient12: String = ""
var strIngredient13: String = ""
var strIngredient14: String = ""
var strIngredient15: String = ""
var strMeasure1: String = ""
var strMeasure2: String = ""
var strMeasure3: String = ""
var strMeasure4: String = ""
var strMeasure5: String = ""
var strMeasure6: String = ""
var strMeasure7: String = ""
var strMeasure8: String = ""
var strMeasure9: String = ""
var strMeasure10: String = ""
var strMeasure11: String = ""
var strMeasure12: String = ""
var strMeasure13: String = ""
var strMeasure14: String = ""
var strMeasure15: String = ""
}
var TableData:Array< Drinks > = Array < Drinks >()
override func viewDidLoad() {
super.viewDidLoad()
for subView in self.SearchBar.subviews
{
for subsubView in subView.subviews
{
if let textField = subsubView as? UITextField
{
textField.attributedPlaceholder = NSAttributedString(string: NSLocalizedString("Search", comment: ""))
}
}
}
self.SearchBar.delegate = self
self.TableView.delegate = self
self.TableView.dataSource = self
}
func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {
if self.SearchBar.text!.isEmpty {
self.isSearching = false
}else{
self.isSearching = true
let userSearchInput = self.SearchBar.text!.lowercaseString
let newString = userSearchInput.stringByReplacingOccurrencesOfString(" ", withString: "%20", options: NSStringCompareOptions.LiteralSearch, range: nil)
let postEndpoint: String = "http://www.thecocktaildb.com/api/json/v1/1/search.php?s=" + newString
guard let url = NSURL(string: postEndpoint) else {
print("Error: cannot create URL")
return
}
let urlRequest = NSURLRequest(URL: url)
let config = NSURLSessionConfiguration.defaultSessionConfiguration()
let session = NSURLSession(configuration: config)
let task = session.dataTaskWithRequest(urlRequest, completionHandler: { (data, response, error) in
guard let responseData = data else {
print("Error: did not receive data")
return
}
guard error == nil else {
print("error calling GET on www.thecocktaildb.com")
print(error)
return
}
let post: NSDictionary
do {
post = try NSJSONSerialization.JSONObjectWithData(responseData,
options: []) as! NSDictionary
} catch {
print("error trying to convert data to JSON")
return
}
var count = 1
if let drinks = post["drinks"] as? [NSDictionary] {
self.TableData.removeAll()
for drink in drinks {
let adrink = Drinks()
if let strDrink = drink["strDrink"] as? String {
print(String(count) + ". " + strDrink)
adrink.strDrink = strDrink
count++
}
if let strCategory = drink["strCategory"] as? String {
print(" Category: " + strCategory)
adrink.strCategory = strCategory
}
if let strDrinkThumb = drink["strDrinkThumb"] as? String {
print(" Thumbnail Image: " + strDrinkThumb)
adrink.strDrinkThumb = strDrinkThumb
}
self.TableData.append(adrink)
self.TableView.reloadData()
}
}
})
task.resume()
}
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return TableData.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath)
//title = TableData[indexPath.row].strDrink
cell.textLabel?.text = TableData[indexPath.row].strDrink;
let imageString = TableData[indexPath.row].strDrinkThumb
if (imageString == ""){
let noDrinkImage : UIImage = UIImage(named: "noimage.jpg")!
cell.imageView!.image = noDrinkImage
}else{
let drinkImage = UIImage(data: NSData(contentsOfURL: NSURL(string:TableData[indexPath.row].strDrinkThumb)!)!)
cell.imageView!.image = drinkImage
}
return cell
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
tableView.deselectRowAtIndexPath(indexPath, animated: true)
print(TableData[indexPath.row].strDrink)
valueToPass = TableData[indexPath.row]
//self.performSegueWithIdentifier("drinkSegue", sender: TableData[indexPath.row])
}
// hide kwyboard when search button clicked
func searchBarSearchButtonClicked(searchBar: UISearchBar) {
self.SearchBar.resignFirstResponder()
}
// hide keyboard when cancel button clicked
func searchBarCancelButtonClicked(searchBar: UISearchBar) {
self.SearchBar.text = ""
self.SearchBar.resignFirstResponder()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if (segue.identifier == "DrinkSegue") {
// initialize new view controller and cast it as your view controller
let drinkViewController = segue.destinationViewController as! DrinkViewController
// your new view controller should have property that will store passed value
drinkViewController.passedValue = valueToPass
}
}
}
DrinkViewController.swift
class DrinkViewController: UIViewController {
#IBOutlet weak var DrinkNameLabel: UILabel!
var passedValue : SearchViewController.Drinks!
override func viewDidLoad() {
super.viewDidLoad()
DrinkNameLabel.text = passedValue!.strDrink
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}

Answer 1

Do it like this instead
In your didSelectRowAtIndexPath pass the array
self.performSegueWithIdentifier("drinkSegue", sender: TableData[indexPath.row])
Here you need to pass the array to your DrinkViewController
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if (segue.identifier == "DrinkSegue") {
// initialize new view controller and cast it as your view controller
let drinkViewController = segue.destinationViewController as! DrinkViewController
// your new view controller should have property that will store passed value
drinkViewController.passedValue = valueToPass
// declare myArray in your drinkViewController and then assign it here
// now your array that you passed will be available through myArray
drinkViewController.myArray = sender
}
}
Update
After I got your project I noticed that the issue you had was that you did drag a segue from the tableView to the drinksController directly - what happened is that didSelectRowAtIndexPath will not be called and your sender will always be nil drinkViewController.myArray = sender as! Drinks.
I changed that by dragging the segue from the viewController to the drinksController instead.