adjust wheel animation to remain on CALayer and not hitting main CPU thread on every cycle.

MVMCoreUI/Atomic/Atoms/Views/Wheel.swift

@@ -11,7 +11,7 @@ import UIKit
 @objcMembers open class Wheel: View, MVMCoreUIViewConstrainingProtocol {
     
     var heightConstraint: NSLayoutConstraint?
-    var gradientLayer: CALayer?
+    weak var gradientLayer: CALayer?
     var graphModel: WheelModel? {
         return model as? WheelModel
     }
@@ -170,20 +170,9 @@ import UIKit
             rotation.timingFunction = CAMediaTimingFunction(name: .linear)
             rotation.fillMode = .both
             rotation.isRemovedOnCompletion = false
+            rotation.repeatCount = Float.greatestFiniteMagnitude
             
-            //avoid infinity animation take high CPU momery usage when layer is not displayed
-            rotation.delegate = self
-            rotation.repeatCount = 1
             self.gradientLayer?.add(rotation, forKey: "rotation")
         })
     }
 }
-
-
-extension Wheel: CAAnimationDelegate {
-    public func animationDidStop(_ anim: CAAnimation, finished flag: Bool) {
-        if let object = graphModel {
-            rotationAnimation(object)
-        }
-    }
-}