SpriteKit Hero movement choke on nodes' connection - swift

Question

My game is a sidescroller, so the Hero has the constant speed, which is set to his velocity every update. When I form a floor with several "boxes", Hero stops where the first one ends and the second begins. They're of the same size and are on the same y-axis, why does this happen?
PhysicsBody of Hero:
self.physicsBody = SKPhysicsBody(rectangleOfSize: rect.size, center: center)
self.physicsBody?.usesPreciseCollisionDetection = true
self.physicsBody?.allowsRotation = false
self.physicsBody?.restitution = 0
self.physicsBody?.categoryBitMask = Category.Hero
self.physicsBody?.collisionBitMask = Category.Floor | Category.Hero | Category.Glass | Category.Obstacle
self.physicsBody?.contactTestBitMask = Category.Obstacle | Category.Glass | Category.Collision | Category.Doors | Category.EBullet | Category.Enemy | Category.Explosion | Category.Plyuha | Category.Slime
PhysicsBody for obstacle:
self.physicsBody = SKPhysicsBody(rectangleOfSize: size_sprite)
self.physicsBody?.usesPreciseCollisionDetection = true
self.physicsBody?.restitution = 0
self.physicsBody?.allowsRotation = false
self.physicsBody?.pinned = true
self.physicsBody?.categoryBitMask = Category.Obstacle
self.physicsBody?.contactTestBitMask = Category.Bullet | Category.EBullet
self.physicsBody?.collisionBitMask = Category.Hero | Category.Bullet | Category.EBullet

Answer 1

I would create a edge-based physics body that stretches the length of the screen to simulate the floor. This should keep the player from stopping at the edges of your floor pieces because it's a continues edge. you could then try putting any obstacles in front of the player.
Set the physics body like this:
let startPoint = CGPoint() // fill in the desired x and y for start point
let endPoint = CGPoint() // fill in the desired x and y for start point
self.floor.physicsBody = SKPhysicsBody(edgeFromPoint: CGPoint(x: startPoint.x, y: startPoint.y), toPoint: CGPoint(x: endPoint.x, y: endPoint.y))
For other obstacles that might be stopping the player, try debugging by showing where the physics bodies actually are. There might be something you're not expecting to see blocking the player from advancing.
In the viewController, put
skView.showsPhysics = true