Update position of UIImageView Swift - uiview

Question

I'm trying to make a draggable image (monkey) takes the place of another draggable image (banana) when I'm pushing a button.
So far, I've been able to get the coordinates of the banana, and store them as the new x,y coordinates of the monkey. But, the view is not updating and the monkey does not moves to it's new place.
I'm sure that I need to update the view, but can't figure it out.
I've tried to add a new subview (self.view.addSubview(monkey)) but when I do that, it's the entire view that is reset and both monkey and banana are going back to their original coordinates.
Here's the code of the action button :
#IBAction func getCoordinates (sender : AnyObject) {
var bananax = banana.frame.origin.x
var bananay = banana.frame.origin.y
var monkeyx = monkey.frame.origin.x
var monkeyy = monkey.frame.origin.y
println("Banana : \(bananax) et \(bananay)")
println("Monkey's default coordinates : \(monkeyx) et \(monkeyy)")
monkeyx = bananax
monkeyy = bananay
println("Monkey's new coordinates : \(monkeyx) et \(monkeyy)")
}
Any idea on how to update only the monkey and not reseting the entire view ?
Thanks :)

Answer 1

These values are just thrown away when you set monkeyx and monkeyy below.
var monkeyx = monkey.frame.origin.x
var monkeyy = monkey.frame.origin.y
Assigning the values below just assigns the values from one local variable to another. It does not actually change the coordinates for monkey.
monkeyx = bananax
monkeyy = bananay
You must set the new coordinates on monkey by constructing a new CGRect and assigning monkey's frame:
monkey.frame = CGRect(x: bananax, y: bananay, width: monkey.frame.size.width, height: monkey.frame.size.height)
As you are just setting monkey's origin to banana's origin, you can remove all the var declarations and reduce this to one line by constructing monkey's new frame with monkey's size and banana's origin:
monkey.frame = CGRect(origin: banana.frame.origin, size: monkey.frame.size)

Answer 2

Hi create this extends if you want. For Swift
Create File Extends.Swift and add this code
/**
Extension UIView
by DaRk-_-D0G
*/
extension UIView {
/**
Set x Position
:param: x CGFloat
by DaRk-_-D0G
*/
func setX(#x:CGFloat) {
var frame:CGRect = self.frame
frame.origin.x = x
self.frame = frame
}
/**
Set y Position
:param: y CGFloat
by DaRk-_-D0G
*/
func setY(#y:CGFloat) {
var frame:CGRect = self.frame
frame.origin.y = y
self.frame = frame
}
/**
Set Width
:param: width CGFloat
by DaRk-_-D0G
*/
func setWidth(#width:CGFloat) {
var frame:CGRect = self.frame
frame.size.width = width
self.frame = frame
}
/**
Set Height
:param: height CGFloat
by DaRk-_-D0G
*/
func setHeight(#height:CGFloat) {
var frame:CGRect = self.frame
frame.size.height = height
self.frame = frame
}
}
For Use (inherits Of UIView)
inheritsOfUIView.setX(x: 100)
button.setX(x: 100)
view.setY(y: 100)

Answer 3

Now you can do
monkey.frame.origin = banana.frame.origin

Answer 4

If you are using a UIImageView for monkey and banana, you can simplify this by doing the following
monkey.center = banana.center
Understand that there is a difference between origin and center. See more here:
UIView's frame, bounds, center, origin, when to use what?
but based on question, I think center should work fine and it is simpler.