ios - Draw a grid with SpriteKit -

what best way draw grid this using spritekit 2d game engine? requirements:

• input programatically number of columns , rows (5x5, 10x3, 3x4 etc.).
• draw programmatically using skspritenode or skshapenode, since using images of square this doesn't seem efficient me.
• the squares should have fixed size (let's each 40x40).
• the grid should vertically , horizontally centred in view.

i'm planning use skspritenode (from image) player moving in different squares in grid.
so, i'll save in 2 dimensional array central point (x,y) of each square , move player's current position position. if have better suggestion too, i'd hear it.

i appreciate solution in swift (preferably 2.1), objective-c too. planning on using on iphone devices.
question close to one. appreciated.

i suggest implement grid texture of skspritenode because sprite kit renders grid in single draw call. here's example of how that:

class grid:skspritenode {     var rows:int!     var cols:int!     var blocksize:cgfloat!      convenience init?(blocksize:cgfloat,rows:int,cols:int) {         guard let texture = grid.gridtexture(blocksize: blocksize,rows: rows, cols:cols) else {             return nil         }         self.init(texture: texture, color:skcolor.clear, size: texture.size())         self.blocksize = blocksize         self.rows = rows         self.cols = cols     }      class func gridtexture(blocksize:cgfloat,rows:int,cols:int) -> sktexture? {         // add 1 height , width ensure borders within sprite         let size = cgsize(width: cgfloat(cols)*blocksize+1.0, height: cgfloat(rows)*blocksize+1.0)         uigraphicsbeginimagecontext(size)          guard let context = uigraphicsgetcurrentcontext() else {             return nil         }         let bezierpath = uibezierpath()         let offset:cgfloat = 0.5         // draw vertical lines         in 0...cols {             let x = cgfloat(i)*blocksize + offset             bezierpath.move(to: cgpoint(x: x, y: 0))             bezierpath.addline(to: cgpoint(x: x, y: size.height))         }         // draw horizontal lines         in 0...rows {             let y = cgfloat(i)*blocksize + offset             bezierpath.move(to: cgpoint(x: 0, y: y))             bezierpath.addline(to: cgpoint(x: size.width, y: y))         }         skcolor.white.setstroke()         bezierpath.linewidth = 1.0         bezierpath.stroke()         context.addpath(bezierpath.cgpath)         let image = uigraphicsgetimagefromcurrentimagecontext()         uigraphicsendimagecontext()          return sktexture(image: image!)     }      func gridposition(row:int, col:int) -> cgpoint {         let offset = blocksize / 2.0 + 0.5         let x = cgfloat(col) * blocksize - (blocksize * cgfloat(cols)) / 2.0 + offset         let y = cgfloat(rows - row - 1) * blocksize - (blocksize * cgfloat(rows)) / 2.0 + offset         return cgpoint(x:x, y:y)     } } 

and here's how create grid , add game piece grid

class gamescene: skscene {     override func didmove(to: skview) {         if let grid = grid(blocksize: 40.0, rows:5, cols:5) {             grid.position = cgpoint (x:frame.midx, y:frame.midy)             addchild(grid)              let gamepiece = skspritenode(imagenamed: "spaceship")             gamepiece.setscale(0.0625)             gamepiece.position = grid.gridposition(row: 1, col: 0)             grid.addchild(gamepiece)         }     } } 

update:

to determine grid square touched, add init

self.isuserinteractionenabled = true 

and grid class:

override func touchesbegan(_ touches: set<uitouch>, withevent event: uievent?) {     touch in touches {         let position = touch.location(in:self)         let node = atpoint(position)         if node != self {             let action = skaction.rotate(by:cgfloat.pi*2, duration: 1)             node.run(action)         }         else {             let x = size.width / 2 + position.x             let y = size.height / 2 - position.y             let row = int(floor(x / blocksize))             let col = int(floor(y / blocksize))             print("\(row) \(col)")         }     } }