How to draw a line in the simplest way in swift

Question

I am fairly new to swift and Xcode and I am trying to make a tic tac toe game. I have everything figured out except how to draw a line through the three x's or o's. I have no idea on how to draw lines. I have looked on the web for the answer and can't figure it out.

Answer 1

Try looking into UIBezierPath, it will help you a lot for drawing lines. Here is documentation. Here is an example:

override func drawRect(rect: CGRect) {     let aPath = UIBezierPath()      aPath.move(to: CGPoint(x:<#start x#>, y:<#start y#>))     aPath.addLine(to: CGPoint(x: <#end x#>, y: <#end y#>))      // Keep using the method addLine until you get to the one where about to close the path     aPath.close()      // If you want to stroke it with a red color     UIColor.red.set()     aPath.lineWidth = <#line width#>     aPath.stroke() } 

Make sure you put this code in the drawRect, like in the example above.

If you need to update the drawing just call setNeedsDisplay() to update.

Answer 2

Update for Swift 3.x using Epic Defeater's example

override func draw(_ rect: CGRect) {         let aPath = UIBezierPath()          aPath.move(to: CGPoint(x:20, y:50))          aPath.addLine(to: CGPoint(x:300, y:50))          //Keep using the method addLineToPoint until you get to the one where about to close the path          aPath.close()          //If you want to stroke it with a red color         UIColor.red.set()         aPath.stroke()         //If you want to fill it as well         aPath.fill()     }