From 382b9f425269d2ab87b778c3352ec592a42951fb Mon Sep 17 00:00:00 2001
From: Benoit PEREIRA DA SILVA <benoit@pereira-da-silva.com>
Date: Thu, 29 Aug 2013 11:04:51 +0200
Subject: [PATCH] Fixes #21

We disable on UIKeyboardWillShowNotification and re-enable on
UIKeyboardDidHideNotification if necessary
---
 .../Helpers/LSCollectionViewHelper.m          | 37 ++++++++++++++++---
 1 file changed, 32 insertions(+), 5 deletions(-)

diff --git a/DraggableCollectionView/Helpers/LSCollectionViewHelper.m b/DraggableCollectionView/Helpers/LSCollectionViewHelper.m
index 9075b07..52f265a 100644
--- a/DraggableCollectionView/Helpers/LSCollectionViewHelper.m
+++ b/DraggableCollectionView/Helpers/LSCollectionViewHelper.m
@@ -37,8 +37,15 @@ @interface LSCollectionViewHelper ()
     _ScrollingDirection scrollingDirection;
     BOOL canWarp;
     BOOL canScroll;
+    
+    id __weak _observerForUIKeyboardWillShowNotification;
+    id __weak _observerForUIKeyboardDidHideNotification;
+    
+    
 }
 @property (readonly, nonatomic) LSCollectionViewLayoutHelper *layoutHelper;
+@property (nonatomic) BOOL wasEnabledBeforKeyBoardShow;
+
 @end
 
 @implementation LSCollectionViewHelper
@@ -63,7 +70,7 @@ - (id)initWithCollectionView:(UICollectionView *)collectionView
         _panPressGestureRecognizer = [[UIPanGestureRecognizer alloc]
                                       initWithTarget:self action:@selector(handlePanGesture:)];
         _panPressGestureRecognizer.delegate = self;
-
+        
         [_collectionView addGestureRecognizer:_panPressGestureRecognizer];
         
         for (UIGestureRecognizer *gestureRecognizer in _collectionView.gestureRecognizers) {
@@ -74,10 +81,30 @@ - (id)initWithCollectionView:(UICollectionView *)collectionView
         }
         
         [self layoutChanged];
+        
+        LSCollectionViewHelper __weak *weakSelf=self;
+        _observerForUIKeyboardWillShowNotification=[[NSNotificationCenter defaultCenter] addObserverForName:UIKeyboardWillShowNotification
+                                                                                                     object:nil
+                                                                                                      queue:nil
+                                                                                                 usingBlock:^(NSNotification *note) {
+                                                                                                     weakSelf.wasEnabledBeforKeyBoardShow=weakSelf.enabled;
+                                                                                                     weakSelf.enabled=NO;
+                                                                                                 }];
+        
+        _observerForUIKeyboardDidHideNotification=[[NSNotificationCenter defaultCenter] addObserverForName:UIKeyboardDidHideNotification
+                                                                                                    object:nil
+                                                                                                     queue:nil
+                                                                                                usingBlock:^(NSNotification *note) {
+                                                                                                    weakSelf.enabled=weakSelf.wasEnabledBeforKeyBoardShow;
+                                                                                                }];
+        
+        
     }
     return self;
 }
 
+
+
 - (LSCollectionViewLayoutHelper *)layoutHelper
 {
     return [(id <UICollectionViewLayout_Warpable>)self.collectionView.collectionViewLayout layoutHelper];
@@ -259,8 +286,8 @@ - (void)handleLongPressGesture:(UILongPressGestureRecognizer *)sender
             }
             // Tell the data source to move the item
             [(id<UICollectionViewDataSource_Draggable>)self.collectionView.dataSource collectionView:self.collectionView
-                                                                              moveItemAtIndexPath:self.layoutHelper.fromIndexPath
-                                                                                      toIndexPath:self.layoutHelper.toIndexPath];
+                                                                                 moveItemAtIndexPath:self.layoutHelper.fromIndexPath
+                                                                                         toIndexPath:self.layoutHelper.toIndexPath];
             
             // Move the item
             [self.collectionView performBatchUpdates:^{
@@ -304,8 +331,8 @@ - (void)warpToIndexPath:(NSIndexPath *)indexPath
             collectionView:self.collectionView
             canMoveItemAtIndexPath:self.layoutHelper.fromIndexPath
             toIndexPath:indexPath] == NO) {
-        return;
-    }
+            return;
+        }
     [self.collectionView performBatchUpdates:^{
         self.layoutHelper.hideIndexPath = indexPath;
         self.layoutHelper.toIndexPath = indexPath;