How to set velocity in Swift
sprite-kit, swift
Solution
From Apple's SpriteKit documentation:
A Boolean value that indicates whether the physics body is moved by the physics simulation.
Declaration
Swift
`var dynamic: Bool`
Objective-C
` @property(nonatomic, getter=isDynamic) BOOL dynamic`
Discussion
If the value is NO, the physics body ignores all forces and impulses applied to it. This property is ignored on edge-based bodies; they are automatically static.
As 0x141E says, you have to make your `SKPhysicsBody` dynamic, or it won't move.
Problem
Below is an Enemy node in Sprite Kit, in Swift. I have set the velocity for the node, but when it spawns there is no movement. Xcode is giving me no errors, is there something I'm doing wrong here? ``` class Enemy: SKSpriteNode { init(imageNamed: String) { let imageTexture = SKTexture(imageNamed: imageNamed) super.init(texture: imageTexture, color: nil, size: imageTexture.size()) self.name = "Enemy" self.physicsBody = SKPhysicsBody(rectangleOfSize: imageTexture.size()) self.physicsBody?.dynamic = false self.physicsBody?.velocity = CGVectorMake(10.0,10.0) } } ```