Attempts to resolve rotation issue (#1) which was not handled previously.

Requires view controller to forward rotation callbacks to the paging view (as shown in the demo).

Each rotation is a reload of the paging view, causing its view to be recycled and cause weird animation on rotation.

Will try to solve it sometimes in the future.

Author: lxcid

LXPagingViews/PagingView.h

@@ -43,4 +43,7 @@
 
 - (void)setSelectedPageIndex:(NSUInteger)theSelectedPageIndex animated:(BOOL)theAnimated;
 
+- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)theToInterfaceOrientation duration:(NSTimeInterval)theDuration;
+- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)theInterfaceOrientation duration:(NSTimeInterval)theDuration;
+
 @end

LXPagingViews/PagingView.m

@@ -18,6 +18,7 @@ @interface PagingView ()
 @property (nonatomic, assign) NSUInteger numberOfItems;
 @property (nonatomic, strong) NSMutableArray *visibleReusableViews;
 @property (nonatomic, assign, getter = isReferencingSuperview) BOOL referencingSuperview;
+@property (nonatomic, assign) NSUInteger selectedPageIndexBeforeRotation;
 
 - (void)layoutSubviewsFromIndex:(NSUInteger)theFromIndex toIndex:(NSUInteger)theToIndex;
 
@@ -33,6 +34,7 @@ @implementation PagingView
 @synthesize numberOfItems = _numberOfItems;
 @synthesize visibleReusableViews = _visibleReusableViews;
 @synthesize referencingSuperview = _referencingSuperview;
+@synthesize selectedPageIndexBeforeRotation = _selectedPageIndexBeforeRotation;
 
 - (id<PagingViewDelegate>)delegate {
     return (id<PagingViewDelegate>)[super delegate];
@@ -288,4 +290,18 @@ - (void)observeValueForKeyPath:(NSString *)theKeyPath ofObject:(id)theObject cha
     }
 }
 
+#pragma mark - Rotation methods
+
+- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)theToInterfaceOrientation duration:(NSTimeInterval)theDuration {
+    self.selectedPageIndexBeforeRotation = self.selectedPageIndex;
+}
+
+- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)theInterfaceOrientation duration:(NSTimeInterval)theDuration {
+    self.needsReloadData = YES;
+    [self setNeedsLayout];
+    [self layoutIfNeeded];
+    self.selectedPageIndex = self.selectedPageIndexBeforeRotation;
+    self.selectedPageIndexBeforeRotation = 0;
+}
+
 @end

LXPagingViewsDemo/PagingViewController.m

@@ -65,6 +65,14 @@ - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interface
     return (interfaceOrientation == UIInterfaceOrientationPortrait);
 }
 
+- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)theToInterfaceOrientation duration:(NSTimeInterval)theDuration {
+    [self.pagingView willAnimateRotationToInterfaceOrientation:theToInterfaceOrientation duration:theDuration];
+}
+
+- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)theToInterfaceOrientation duration:(NSTimeInterval)theDuration {
+    [self.pagingView willRotateToInterfaceOrientation:theToInterfaceOrientation duration:theDuration];
+}
+
 #pragma mark - PagingViewDelegate methods
 
 - (NSInteger)numberOfItemsInPagingView:(PagingView *)thePagingView {

LXPagingViewsDemo/PeepingPagingViewController.m

@@ -64,6 +64,14 @@ - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interface
     return (interfaceOrientation == UIInterfaceOrientationPortrait);
 }
 
+- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)theToInterfaceOrientation duration:(NSTimeInterval)theDuration {
+    [self.peepingPagingView.pagingView willAnimateRotationToInterfaceOrientation:theToInterfaceOrientation duration:theDuration];
+}
+
+- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)theToInterfaceOrientation duration:(NSTimeInterval)theDuration {
+    [self.peepingPagingView.pagingView willRotateToInterfaceOrientation:theToInterfaceOrientation duration:theDuration];
+}
+
 #pragma mark - PagingViewDelegate methods
 
 - (NSInteger)numberOfItemsInPagingView:(PagingView *)thePagingView {