sprite kit - ios - Spritekit - How to calculate the distance between two nodes?

Question

I have two sknodes on the screen. What is the best way to calculate the distance ('as the crow flies' type of distance, I don't need a vector etc)?

I've had a google and search on here and can't find something that covers this (there aren't too many threads on stackoverflow about sprite kit)

Answer 1

Here's a function that will do it for you. This is from an Apple's Adventure example code:

CGFloat SDistanceBetweenPoints(CGPoint first, CGPoint second) {
    return hypotf(second.x - first.x, second.y - first.y);
}

To call this function from your code:

CGFloat distance = SDistanceBetweenPoints(nodeA.position, nodeB.position);