CODEWITHSUNDEEP
iosswiftswift3
Andrew O'Rourke
Andrew O'Rourke

Reputation: 137

How to check if a child node has been touched Swift 3

I have sprites moving across the screen, and if they are clicked then they disappear (i.e deleted).

I have overridden the touchesBegan func as follows:

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    print("touch")
    let touch = touches.first!
    let location = touch.location(in: self)
    for child in self.children {

        if child.position == location {
            child.removeFromParent()
        }
    }
}

This doesn't seem to have any effect, can someone tell me where I am going wrong?

Upvotes: 1

Views: 904

Answers (1)

Sore
Sore

Reputation: 186

In which class did you implement this method?

If it was in SKNode itself, you simply do:

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {

    self.removeFromParent()

}

However, if this method is in SKScene, this way that was implemented would probably not work. Because child.position returns a point (x, y) where the touch was made. And you're trying to compare the touch point and position of the SKNode (center point), it's unlikely to work.

Instead of using this way, try using .nodeAtPoint, a method of SKScene.

For this you will need to put a value in the 'name' property of your SKNode:

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    print("touch")
    let touch = touches.first!
    let positionInScene = touch.locationInNode(self)
    let touchedNode = self.nodeAtPoint(positionInScene)

    if let name = touchedNode.name
    {
        if name == "your-node-name"
        {
            touchedNode.removeFromParent()
        }
    }

}

Font: How do I detect if an SKSpriteNode has been touched

Upvotes: 2

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