How do I assign image and label values from NSDictionary? - ios

Question

I am passing data(image and Label) from one view controller to another. I am storing them in a NSDictionary, and the data is being passed to the new viewcontroller. I have connected a image view as well as a label. How do I assign the image and the label the values in the NSDictionary? Below is the code for transferring the data from one view controller to another.
var dicSelected : NSDictionary!
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
print("Cell \(indexPath.item) selected")
print(arrayOfFriendsNames[indexPath.item])
self.dicSelected = ["friendname" : arrayOfFriendsNames[indexPath.item], "friendimage" : arrayOfFriends[indexPath.item]]
self.performSegueWithIdentifier("friendaccess", sender: dicSelected)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if(segue.identifier == "friendaccess"){
let nextViewOBJ = segue.destinationViewController as! FriendProfilePages
nextViewOBJ.dicData = self.dicSelected;
}
}
Below is the code for the FriendProfilePages.
#IBOutlet weak var friendimage: UIImageView!
#IBOutlet weak var friendname: UILabel!
var dicData : NSDictionary?
override func viewWillAppear(animated: Bool) {
print("Dictionary: \(self.dicData)")
}

Answer 1

Or you can create a model class with properties
var image: UIImage?
var text: String?
and then pass that class's object to next view controller and assign those values to your friendimage.image and friendname.text
Code for FriendProfilePages:
#IBOutlet weak var friendimage: UIImageView!
#IBOutlet weak var friendname: UILabel!
var dataModel : DataModel?
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
friendimage.image = dataModel.image
friendname.text = dataModel.text
}
Now For performing Segue
var selectedData = DataModel()
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
print("Cell \(indexPath.item) selected")
print(arrayOfFriendsNames[indexPath.item])
self.selectedData.text = arrayOfFriendsNames[index] as? String
self.selectedData.image = arrayOfFriends[index] as? UIImage
self.performSegueWithIdentifier("friendaccess", sender: dicSelected)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if(segue.identifier == "friendaccess"){
let nextViewOBJ = segue.destinationViewController as! FriendProfilePages
nextViewOBJ.dataModel = self.selectedData;
}
}
Declare it anywhere
class DataModel : NSObject {
var image: UIImage?
var text: String?
}
just to get you an idea...

Answer 2

You should use proper types to transfer data rather than dictionaries. You could define an appropriate type like this
struct FriendProfileData {
let name: String
let image: UIImage
}
You'll need to update your selection code to create one of these new structs like this
var selected: FriendProfileData
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
selected = FriendProfileData(name: arrayOfFriendsNames[indexPath.item], image: arrayOfFriends[indexPath.item])
performSegueWithIdentifier("friendaccess", sender: self)
}
Your prepareForSegue needs to then change to
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if (segue.identifier == "friendaccess"){
guard let selected = selected else {
return
}
let nextViewOBJ = segue.destinationViewController as! FriendProfilePages
nextViewOBJ.dicData = selected;
}
}
Then in the viewDidAppear
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
friendImage.image = selected.image
friendName.text = selected.name
}