How to move single SKspritenode from array - ios

Question

I have an array of sprites and I move it when click on it, the problem is that it is moving all the sprites and I want it to move a single element, how can I do this? thank you in advance
This is my code:
var containerPieces: [ContainerPieces] = []
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
for touch in touches {
let location = touch.location(in: self)
let rsCurrent = self.atPoint(location)
for nodo in containerPieces {
let rsBody = nodo.block.physicsBody
if rsBody == rsCurrent.physicsBody {
if nodo.block.frame.contains(location) {
nodo.block.position = location
nodo.block.run(blinkAnimation(), withKey:"wiggle")
isFingerOnPaddle = true
}
}
}
}
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
if isFingerOnPaddle {
let touch = touches.first
let touchLocation = touch!.location(in: self)
let previousLocation = touch!.previousLocation(in: self)
for nodo in containerPieces{
var paddleX = nodo.block.position.x + (touchLocation.x - previousLocation.x)
var paddleY = nodo.block.position.y + (touchLocation.y - previousLocation.y)
paddleX = max(paddleX, nodo.block.size.width/2)
paddleX = min(paddleX, size.width - nodo.block.size.width/2)
paddleY = max(paddleY, nodo.block.size.width/2)
paddleY = min(paddleY, size.width - nodo.block.size.width/2)
nodo.block.position = CGPoint(x: paddleX, y: paddleY)
}
}
}