From 75b7424d3f11eec8e8ac75ab5cb8f3fbd4337120 Mon Sep 17 00:00:00 2001
From: Jack <xhzengAIB@gmail.com>
Date: Wed, 14 Jan 2015 18:59:36 +0800
Subject: [PATCH 1/3] Add property control current page update action.

---
 .../XLPagerTabStripViewController.h           |  2 ++
 .../XLPagerTabStripViewController.m           | 20 ++++++++++++++++---
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.h b/XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.h
index 0fcd8a5..be8e859 100644
--- a/XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.h
+++ b/XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.h
@@ -82,6 +82,8 @@ typedef NS_ENUM(NSUInteger, XLPagerTabStripDirection) {
 
 @property (readonly) NSUInteger currentIndex;
 @property BOOL skipIntermediateViewControllers;
+// When user scroll the pager, waiting did end decelerating update page index, Default is NO.
+@property BOOL shouldDidEndDeceleratingUpdatePage;
 
 -(void)moveToViewControllerAtIndex:(NSUInteger)index;
 -(void)moveToViewController:(UIViewController *)viewController;
diff --git a/XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.m b/XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.m
index 03ec878..9898e09 100644
--- a/XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.m
+++ b/XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.m
@@ -71,6 +71,7 @@
     _dataSource = self;
     _lastContentOffset = 0.0f;
     _skipIntermediateViewControllers = YES;
+    _shouldDidEndDeceleratingUpdatePage = NO;
 }
 
 - (void)viewDidLoad
@@ -212,13 +213,20 @@
     return fmodf(self.containerView.contentOffset.x, [self pageWidth]) / [self pageWidth];
 }
 
+- (void)updateCurrentPage
+{
+    NSUInteger currentPage = [self pageForContentOffset:self.containerView.contentOffset.x];
+    if (currentPage != self.currentIndex){
+        self.currentIndex = currentPage;
+    }
+}
+
 -(void)updateContent
 {
     NSArray * childViewControllers = self.pagerTabStripChildViewControllers;
     self.containerView.contentSize = CGSizeMake(CGRectGetWidth(self.containerView.bounds) * childViewControllers.count, self.containerView.contentSize.height);
-    NSUInteger currentPage = [self pageForContentOffset:self.containerView.contentOffset.x];
-    if (currentPage != self.currentIndex){
-        self.currentIndex = currentPage;
+    if (!self.shouldDidEndDeceleratingUpdatePage) {
+        [self updateCurrentPage];
     }
 
     [childViewControllers enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
@@ -296,6 +304,12 @@
     }
 }
 
+- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
+    if (self.shouldDidEndDeceleratingUpdatePage) {
+        [self updateCurrentPage];
+    }
+}
+
 -(void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView
 {
     if (self.containerView == scrollView && _originalPagerTabStripChildViewControllers){

From 4d61cc82f6220bde586ece810f0af1fd786044aa Mon Sep 17 00:00:00 2001
From: Jack <xhzengAIB@gmail.com>
Date: Wed, 13 May 2015 23:11:17 +0800
Subject: [PATCH 2/3] Add two public method

---
 XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.h | 2 ++
 XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.m | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.h b/XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.h
index c1c8bd0..6162892 100644
--- a/XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.h
+++ b/XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.h
@@ -93,7 +93,9 @@ typedef NS_ENUM(NSUInteger, XLPagerTabStripDirection) {
 @property BOOL isElasticIndicatorLimit;
 
 -(void)moveToViewControllerAtIndex:(NSUInteger)index;
+-(void)moveToViewControllerAtIndex:(NSUInteger)index animated:(bool)animated;
 -(void)moveToViewController:(UIViewController *)viewController;
+-(void)moveToViewController:(UIViewController *)viewController animated:(bool)animated;
 -(void)reloadPagerTabStripView;
 
 @end
diff --git a/XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.m b/XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.m
index c9180b0..9109df9 100644
--- a/XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.m
+++ b/XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.m
@@ -166,6 +166,9 @@
     [self moveToViewControllerAtIndex:[self.pagerTabStripChildViewControllers indexOfObject:viewController]];
 }
 
+-(void)moveToViewController:(UIViewController *)viewController animated:(bool)animated {
+    [self moveToViewControllerAtIndex:[self.pagerTabStripChildViewControllers indexOfObject:viewController] animated:animated];
+}
 
 #pragma mark - XLPagerTabStripViewControllerDelegate
 

From 146a25e37164b8575a541ddb149c93e340fa8876 Mon Sep 17 00:00:00 2001
From: Jack <xhzengAIB@gmail.com>
Date: Wed, 27 May 2015 17:24:11 +0800
Subject: [PATCH 3/3] fix the not update for viewDidAppear

---
 .../XL/Controllers/XLPagerTabStripViewController.m         | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.m b/XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.m
index c0e1339..6bb0840 100644
--- a/XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.m
+++ b/XLPagerTabStrip/XL/Controllers/XLPagerTabStripViewController.m
@@ -98,13 +98,6 @@
     }
 }
 
--(void)viewWillAppear:(BOOL)animated
-{
-    [super viewWillAppear:animated];
-    _lastSize = self.containerView.bounds.size;
-}
-
-
 -(void)viewDidAppear:(BOOL)animated
 {
     [super viewDidAppear:animated];