From 23ea9787f071cd355cae6428f73b76107771ca21 Mon Sep 17 00:00:00 2001
From: 06wj <06wj@163.com>
Date: Wed, 13 Feb 2019 17:40:13 +0800
Subject: [PATCH] fix: Tween reverse may error when first update

---
 src/tween/Tween.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tween/Tween.js b/src/tween/Tween.js
index 96acc1f3..2e1cbe55 100644
--- a/src/tween/Tween.js
+++ b/src/tween/Tween.js
@@ -333,7 +333,7 @@ return Class.create(/** @lends Tween.prototype */{
         ratio = ratio <= 0 ? 0 : ratio >= 1 ? 1 : ratio;
         var easeRatio = me.ease ? me.ease(ratio) : ratio;
 
-        if(me.reverse){
+        if(me.reverse && me.isStart){
             //backward
             if(me._reverseFlag < 0) {
                 ratio = 1 - ratio;