Add clockwise rotation property

Author: BalestraPatrick

Example/ParticlesLoadingView/ViewController.swift

@@ -22,6 +22,7 @@ class ViewController: UIViewController {
         view.particleEffect = .Laser
         view.duration = 1.5
         view.particlesSize = 15.0
+        view.clockwiseRotation = true
         view.layer.borderColor = UIColor.lightGrayColor().CGColor
         view.layer.borderWidth = 1.0
         view.layer.cornerRadius = 15.0

Pod/Classes/ParticlesLoadingView.swift

@@ -26,6 +26,9 @@ public class ParticlesLoadingView: UIView {
         }
     }
 
+    /// Default value is false so the animation is counter-clockwise. Set this property to true to make the animation go clockwise.
+    public var clockwiseRotation: Bool = false
+    
     /// SKScene subclass that is responsible for the emission of particles.
     private var scene: ParticlesScene!
 

Pod/Classes/ParticlesScene.swift

@@ -76,7 +76,12 @@ public class ParticlesScene: SKScene {
             let verticalTranslationFactor = 2 / (1 - verticalInsetScaleFactor)
             border.applyTransform(CGAffineTransformMakeScale(horizontalInsetScaleFactor, verticalInsetScaleFactor))
             border.applyTransform(CGAffineTransformMakeTranslation(scene.frame.size.width / horizontalTranslationFactor, scene.frame.size.height / verticalTranslationFactor))
-            let followLine = SKAction.followPath(border.CGPath, asOffset: false, orientToPath: true, duration: duration)
+            var followLine = SKAction.followPath(border.CGPath, asOffset: false, orientToPath: true, duration: duration)
+            if let superview = view?.superview as? ParticlesLoadingView {
+                if superview.clockwiseRotation {
+                    followLine = followLine.reversedAction()
+                }
+            }
             loopAction = SKAction.repeatActionForever(followLine)
         }
     }