Drawing simple lines on iPhone with CoreGraphics

Question

I would like to draw a straight line between where a user touches the screen, and where the touch ends. i need multiple lines, for if the user repeats the touch-drag-release act

Answer 1

I know this is an old question, but based on the answer I wrote the following in Swift:

override func drawRect(rect: CGRect) {
    super.drawRect(rect)

    UIColor.blackColor().setStroke() // update with correct color

    let path = UIBezierPath()
    path.lineWidth = UIScreen.mainScreen().scale > 1 ? 0.5 : 1

    // change the points to what you need them to be
    let leftPoint = CGPointMake(0, CGRectGetHeight(rect))
    let rightPoint = CGPointMake(CGRectGetWidth(rect), CGRectGetHeight(rect))

    path.moveToPoint(leftPoint)
    path.addLineToPoint(rightPoint)

    path.stroke()
}