From 7c447fcab10a9e2fd9b199f35507a0c41a343f2e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=BB=8E=E6=98=8E?= <2534290808@qq.com>
Date: Thu, 30 May 2019 17:56:35 +0800
Subject: [PATCH] fixes positions.isNotEmpty errors

---
 lib/transformer_page_view.dart | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/transformer_page_view.dart b/lib/transformer_page_view.dart
index f4bc33f..7160c11 100644
--- a/lib/transformer_page_view.dart
+++ b/lib/transformer_page_view.dart
@@ -522,7 +522,7 @@ class _TransformerPageViewState extends State<TransformerPageView> {
 
     if (_pageController.getRenderIndexFromRealIndex(_activeIndex) != index) {
       _fromIndex = _activeIndex = _pageController.initialPage;
-      if (!created) {
+      if (!created && _pageController.hasClients) {
         int initPage = _pageController.getRealIndexFromRenderIndex(index);
         _pageController.animateToPage(initPage,
             duration: widget.duration, curve: widget.curve);
@@ -601,13 +601,13 @@ class _TransformerPageViewState extends State<TransformerPageView> {
         //ignore this event
         return;
     }
-    if (widget.controller.animation) {
+    if (widget.controller.animation && _pageController.hasClients) {
       _pageController
           .animateToPage(index,
               duration: widget.duration, curve: widget.curve ?? Curves.ease)
           .whenComplete(widget.controller.complete);
     } else {
-      _pageController.jumpToPage(index);
+      if(_pageController.hasClients){_pageController.jumpToPage(index);};
       widget.controller.complete();
     }
   }