Straight line path in swift

Question

I need the help i have this code this is doing circular path but what i need is straight line i tried to do this but unsuccessful.

override func viewDidAppear(animated: Bool) {







    super.viewDidAppear(animated)



    let orbit = CAKeyframeAnimation(keyPath: "position")

    var affineTransform = CGAffineTransformMakeRotation(0.0)

    affineTransform = CGAffineTransformRotate(affineTransform, CGFloat(M_PI))

    let circlePath = UIBezierPath(arcCenter: CGPoint(x: 150 - (100/2),y: 150 - (100/2)), radius:  CGFloat(150), startAngle: CGFloat(0), endAngle:CGFloat(M_PI * 2), clockwise: true)



    orbit.circlePath = path.CGPath

    orbit.duration = 8

    orbit.additive = true

    orbit.repeatCount = 0.25

    orbit.calculationMode = kCAAnimationPaced

    orbit.rotationMode = kCAAnimationRotateAuto



    moveobj.layer .addAnimation(orbit, forKey: "orbit")

}

and more one question how to do this disappear after finished to move.

Thanks

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Answer 1

You can easy do this using a CAShapeLayer.

    let line = CAShapeLayer()
    let linePath = UIBezierPath()
    linePath.move(to: CGPoint(x: 100, y: 100))
    linePath.addLine(to: CGPoint(x: 300, y: 300))
    line.path = linePath.cgPath
    line.strokeColor = UIColor.red.cgColor
    self.view.layer.addSublayer(line)

First, create a CAShapeLayer. Second, create a UIBezierPath to define your line's path. Third, move the bezier path to a starting point. Fourth, add the ending point of the bezier path. fifth, apply the bezier path to the CAShapeLayer. Sixth, apply a stroke color so you can see the line when you add it as a sublayer. Finally, add it is a sublayer of the view.

Straight line path in swift

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