add collectionView:itemAtIndexPath:didMoveToIndexPath:

Zach Drayer · Zach Drayer · commit 1642a7216954 · 2013-05-05T10:48:55.000-07:00
diff --git a/LXReorderableCollectionViewFlowLayout/LXReorderableCollectionViewFlowLayout.h b/LXReorderableCollectionViewFlowLayout/LXReorderableCollectionViewFlowLayout.h
@@ -23,6 +23,8 @@
 @optional
 
 - (void)collectionView:(UICollectionView *)collectionView itemAtIndexPath:(NSIndexPath *)fromIndexPath willMoveToIndexPath:(NSIndexPath *)toIndexPath;
+- (void)collectionView:(UICollectionView *)collectionView itemAtIndexPath:(NSIndexPath *)fromIndexPath didMoveToIndexPath:(NSIndexPath *)toIndexPath;
+
 - (BOOL)collectionView:(UICollectionView *)collectionView canMoveItemAtIndexPath:(NSIndexPath *)indexPath;
 - (BOOL)collectionView:(UICollectionView *)collectionView itemAtIndexPath:(NSIndexPath *)fromIndexPath canMoveToIndexPath:(NSIndexPath *)toIndexPath;
 
diff --git a/LXReorderableCollectionViewFlowLayout/LXReorderableCollectionViewFlowLayout.m b/LXReorderableCollectionViewFlowLayout/LXReorderableCollectionViewFlowLayout.m
@@ -165,7 +165,12 @@ - (void)invalidateLayoutIfNecessary {
             [strongSelf.collectionView deleteItemsAtIndexPaths:@[ previousIndexPath ]];
             [strongSelf.collectionView insertItemsAtIndexPaths:@[ newIndexPath ]];
         }
-    } completion:nil];
+    } completion:^(BOOL finished) {
+        __strong typeof(self) strongSelf = weakSelf;
+        if ([strongSelf.dataSource respondsToSelector:@selector(collectionView:itemAtIndexPath:didMoveToIndexPath:)]) {
+            [strongSelf.dataSource collectionView:strongSelf.collectionView itemAtIndexPath:previousIndexPath didMoveToIndexPath:newIndexPath];
+        }
+    }];
 }
 
 - (void)invalidatesScrollTimer {

Original file line number	Diff line number	Diff line change
`@@ -165,7 +165,12 @@ - (void)invalidateLayoutIfNecessary {`
`165`	`165`	`[strongSelf.collectionView deleteItemsAtIndexPaths:@[ previousIndexPath ]];`
`166`	`166`	`[strongSelf.collectionView insertItemsAtIndexPaths:@[ newIndexPath ]];`
`167`	`167`	`}`
`168`		`- } completion:nil];`
	`168`	`+ } completion:^(BOOL finished) {`
	`169`	`+ __strong typeof(self) strongSelf = weakSelf;`
	`170`	`+ if ([strongSelf.dataSource respondsToSelector:@selector(collectionView:itemAtIndexPath:didMoveToIndexPath:)]) {`
	`171`	`+ [strongSelf.dataSource collectionView:strongSelf.collectionView itemAtIndexPath:previousIndexPath didMoveToIndexPath:newIndexPath];`
	`172`	`+ }`
	`173`	`+ }];`
`169`	`174`	`}`
`170`	`175`
`171`	`176`	`- (void)invalidatesScrollTimer {`