Remove a UIView stored in an array from superview - objective-c

Question

I know the code I need is [[Array objectAtIndex:index] removeFromSuperview]; but that doesn't work in Swift 2.
I'm trying to remove a UIView stored in an array from the superview. I know I want to remove the object at index 0. Want to remove it at the end of the for loop.
What code will work in Swift?
import UIKit
import Foundation
class PhotoViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
var tileStack = [AnyObject]()
let num = 0
//Beginning of simple image selection and display
#IBOutlet weak var displayImageView: UIImageView!
#IBOutlet weak var tiledView: UIImageView!
#IBAction func choosePicFromLibrary(sender: AnyObject) {
let imagePicker: UIImagePickerController = UIImagePickerController()
imagePicker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
imagePicker.delegate = self
imagePicker.modalPresentationStyle = UIModalPresentationStyle.Popover
if (imagePicker.popoverPresentationController != nil) {
imagePicker.popoverPresentationController!.sourceView = sender as! UIButton
imagePicker.popoverPresentationController!.sourceRect = (sender as! UIButton).bounds
}
presentViewController(imagePicker, animated: true, completion: nil)
}
#IBAction func takePhoto(sender: AnyObject) {
let imagePicker: UIImagePickerController = UIImagePickerController()
imagePicker.sourceType = UIImagePickerControllerSourceType.Camera
imagePicker.delegate = self
imagePicker.modalPresentationStyle = UIModalPresentationStyle.Popover
if (imagePicker.popoverPresentationController != nil) {
imagePicker.popoverPresentationController!.sourceView = sender as! UIButton
imagePicker.popoverPresentationController!.sourceRect = (sender as! UIButton).bounds
}
presentViewController(imagePicker, animated: true, completion: nil)
}
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
dismissViewControllerAnimated(true, completion: nil)
displayImageView.image = info[UIImagePickerControllerOriginalImage] as! UIImage!
}
func imagePickerControllerDidCancel(picker: UIImagePickerController) {
dismissViewControllerAnimated(true, completion: nil)
}
//Beginning of function to cut photo into 9 tiles, then display them randomly.
//cut selected image into 9 pieces and add each cropped image to tileStack array
#IBAction func randomize(sender: AnyObject) {
let selectedImageWidth = displayImageView.image!.size.width
let selectedImageHeight = displayImageView.image!.size.height
let tileSize = CGSizeMake(selectedImageWidth/3, selectedImageHeight/3)
for (var colI = 0; colI < 3; colI++)
{
for (var rowI = 0; rowI < 3; rowI += 1)
{
let tileRect = CGRectMake(CGFloat(rowI) * tileSize.width, tileSize.height * CGFloat(colI), tileSize.width, tileSize.height)
if let selectedImage = displayImageView.image
{
let tileImage = CGImageCreateWithImageInRect(selectedImage.CGImage, tileRect)
let aUItile = UIImage(CGImage: tileImage!)
tileStack.append(aUItile)
}
}
}
//display tiles in order on screen, remove 1 tile (top left, index 0), (eventually mix them up)
let frameWidth = self.view.frame.width
let frameHeight = self.view.frame.height
var xCen = (frameWidth/3)/2
var yCen = (frameHeight/3)/2
var pieceNumber = 0
for (var v = 0; v < 3; v += 1)
{
for (var h = 0; h < 3; h += 1)
{
var tiledView : UIImageView
tiledView = UIImageView(frame:CGRectMake(0, 0, frameWidth/3, (frameHeight)/3))
//tiledView.backgroundColor = UIColor.redColor()
tiledView.center = CGPointMake(xCen, yCen)
tiledView.image = tileStack[pieceNumber] as? UIImage
tiledView.userInteractionEnabled = true
self.view.addSubview(tiledView)
xCen += (frameWidth/3)
pieceNumber += 1
}
xCen = (frameWidth/3)/2
yCen += (frameHeight/3)
}
tileStack[0].removeFromSuperview()
tileStack.removeAtIndex(0)
}

Answer 1

In Swift 2.0, you need to call the removeFromSubview from the object that you want to remove. In your case you need the following:
dispatch_async(dispatch_get_main_queue(),
{
if self.view.subviews.count > 0
{
self.view.subviews[0].removeFromSuperview()
}
})