From b78127402e2072d36aa948c7f736f26adf17f5ba Mon Sep 17 00:00:00 2001
From: kaiyuanlee <fanxiu113@qq.com>
Date: Sun, 25 Apr 2021 21:31:24 +0800
Subject: [PATCH] fix The underline will flash as you swipe left and right

---
 ScrollableTabBar.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ScrollableTabBar.js b/ScrollableTabBar.js
index 1500b2db..81b7d872 100644
--- a/ScrollableTabBar.js
+++ b/ScrollableTabBar.js
@@ -104,8 +104,9 @@ const ScrollableTabBar = createReactClass({
     }
 
   },
-
+  prevPageOffset: 0,//解决 flash 闪屏问题
   updateTabUnderline(position, pageOffset, tabCount) {
+    if(pageOffset==this.prevPageOffset) return
     const lineLeft = this._tabsMeasurements[position].left;
     const lineRight = this._tabsMeasurements[position].right;
 
@@ -122,6 +123,7 @@ const ScrollableTabBar = createReactClass({
       this.state._leftTabUnderline.setValue(lineLeft);
       this.state._widthTabUnderline.setValue(lineRight - lineLeft);
     }
+    this.prevPageOffset = pageOffset
   },
 
   renderTab(name, page, isTabActive, onPressHandler, onLayoutHandler) {