Reordering Elements inside Array of UIImage - ios

Question

I have an array of NSURL array, and I am able to use functions removeAtIndex and insert. I know the fromIndexPath and toIndexPath and this method helps me to accomplish the same for [[NSURL]] using this Delegate method (check var data below):
func moveDataItem(fromIndexPath : NSIndexPath, toIndexPath: NSIndexPath) {
let name = self.data[fromIndexPath.section][fromIndexPath.item]
self.data[fromIndexPath.section].removeAtIndex(fromIndexPath.item)
self.data[toIndexPath.section].insert(name, atIndex: toIndexPath.item)
// do same for UIImage array
}
However, I have an array of UIImage with 3 empty elements with running.
var newImages = [UIImage?]()
viewDidLoad() {
newImages.append(nil)
newImages.append(nil)
newImages.append(nil)
}
My question is how can I use the newImages array inside moveDataItem(), as well as the data and be able to run that lines for rearranging the order for UIImage array.
I tried these but unfortunately I couldn't make them work..
self.newImages[fromIndexPath.section].removeAtIndex(fromIndexPath.item)
// and
self.newImages[fromIndexPath.row].removeAtIndex(fromIndexPath.item)
For clarification, the data array looks like this
lazy var data : [[NSURL]] = {
var array = [[NSURL]]()
let images = self.imageURLsArray
if array.count == 0 {
var index = 0
var section = 0
for image in images {
if array.count <= section {
array.append([NSURL]())
}
array[section].append(image)
index += 1
}
}
return array
}()

Answer 1

This should work for rearranging any 2d array:
func move<T>(fromIndexPath : NSIndexPath, toIndexPath: NSIndexPath, items:[[T]]) -> [[T]] {
var newData = items
if newData.count > 1 {
let thing = newData[fromIndexPath.section][fromIndexPath.item]
newData[fromIndexPath.section].removeAtIndex(fromIndexPath.item)
newData[toIndexPath.section].insert(thing, atIndex: toIndexPath.item)
}
return newData
}
example usage:
var things = [["hi", "there"], ["guys", "gals"]]
// "[["hi", "there"], ["guys", "gals"]]\n"
print(things)
things = move(NSIndexPath(forRow: 0, inSection: 0), toIndexPath: NSIndexPath(forRow:1, inSection: 0), items: things)
// "[["there", "hi"], ["guys", "gals"]]\n"
print(things)
And this will work with a normal array:
func move<T>(fromIndex : Int, toIndex: Int, items:[T]) -> [T] {
var newData = items
if newData.count > 1 {
let thing = newData[fromIndex]
newData.removeAtIndex(fromIndex)
newData.insert(thing, atIndex: toIndex)
}
return newData
}