From 10e58b876bb79ae0c443f2c7c236da208d07125c Mon Sep 17 00:00:00 2001
From: Fang-Pen Lin <bornstub@gmail.com>
Date: Sun, 28 Oct 2018 23:07:02 -0700
Subject: [PATCH] Fix lineDashPhase not set for Stroke.offset bug

---
 .../ShapeAnimationGenerator.swift                     | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Source/animation/types/animation_generators/ShapeAnimationGenerator.swift b/Source/animation/types/animation_generators/ShapeAnimationGenerator.swift
index efc584b8..74048e6a 100644
--- a/Source/animation/types/animation_generators/ShapeAnimationGenerator.swift
+++ b/Source/animation/types/animation_generators/ShapeAnimationGenerator.swift
@@ -107,6 +107,7 @@ func addShapeAnimation(_ animation: BasicAnimation, sceneLayer: CALayer, animati
         layer.lineCap = MCAShapeLayerLineCap.mapToGraphics(model: stroke.cap)
         layer.lineJoin = MCAShapeLayerLineJoin.mapToGraphics(model: stroke.join)
         layer.lineDashPattern = stroke.dashes.map { NSNumber(value: $0) }
+        layer.lineDashPhase = CGFloat(stroke.offset)
     } else if shape.fill == nil {
         layer.strokeColor = MColor.black.cgColor
         layer.lineWidth = 1.0
@@ -201,6 +202,16 @@ fileprivate func generateShapeAnimation(from: Shape, to: Shape, duration: Double
 
         group.animations?.append(dashPatternAnimation)
     }
+    
+    // Dash offset
+    if fromStroke.offset != toStroke.offset{
+        let dashOffsetAnimation = CABasicAnimation(keyPath: "lineDashPhase")
+        dashOffsetAnimation.fromValue = fromStroke.offset
+        dashOffsetAnimation.toValue = toStroke.offset
+        dashOffsetAnimation.duration = duration
+
+        group.animations?.append(dashOffsetAnimation)
+    }
 
     // Group
     group.duration = duration