From ea272f43388d857df36eae02059f8ec5f4efd904 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=A5=9E=E6=BC=A0?= <qianyuan.wqy@alipay.com>
Date: Mon, 13 Aug 2018 11:23:12 +0800
Subject: [PATCH] [WEEX-559][iOS]Fix issue that handleAppear should be resent
 for lazily created scrollview.

---
 ios/sdk/WeexSDK/Sources/Component/WXComponent_internal.h | 2 ++
 ios/sdk/WeexSDK/Sources/Component/WXScrollerComponent.mm | 8 ++++++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/ios/sdk/WeexSDK/Sources/Component/WXComponent_internal.h b/ios/sdk/WeexSDK/Sources/Component/WXComponent_internal.h
index 54a6fa0745..0735ac2f27 100644
--- a/ios/sdk/WeexSDK/Sources/Component/WXComponent_internal.h
+++ b/ios/sdk/WeexSDK/Sources/Component/WXComponent_internal.h
@@ -264,6 +264,8 @@ typedef id (^WXDataBindingBlock)(NSDictionary *data, BOOL *needUpdate);
 
 - (void)_detachSlotEvent:(NSDictionary *)data;
 
+- (void)_buildViewHierarchyLazily;
+
 @end
 
 
diff --git a/ios/sdk/WeexSDK/Sources/Component/WXScrollerComponent.mm b/ios/sdk/WeexSDK/Sources/Component/WXScrollerComponent.mm
index 4a876db8fc..33f9439062 100644
--- a/ios/sdk/WeexSDK/Sources/Component/WXScrollerComponent.mm
+++ b/ios/sdk/WeexSDK/Sources/Component/WXScrollerComponent.mm
@@ -229,8 +229,6 @@ - (void)viewDidLoad
 
 - (void)layoutDidFinish
 {
-
-    
     if ([self isViewLoaded]) {
         [self setContentSize:_contentSize];
         [self adjustSticky];
@@ -240,6 +238,12 @@ - (void)layoutDidFinish
     [_loadingComponent resizeFrame];
 }
 
+- (void)_buildViewHierarchyLazily
+{
+    [super _buildViewHierarchyLazily];
+    [self handleAppear];
+}
+
 - (void)viewWillUnload
 {
     ((UIScrollView *)_view).delegate = nil;