Add array backing to illustrate deletion

steipete · Mar 20, 2013 · 04123be · 04123be
1 parent 6c0ab0b
commit 04123be
Show file tree

Hide file tree

Showing 2 changed files with 85 additions and 4 deletions.
diff --git a/Examples/CollectionView-Simple/CollectionView/ViewController.m b/Examples/CollectionView-Simple/CollectionView/ViewController.m
@@ -53,11 +53,45 @@ OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 NSString *kDetailedViewControllerID = @"DetailView";    // view controller storyboard id
 NSString *kCellID = @"cellID";                          // UICollectionViewCell storyboard id
 
+@interface ViewController(){
+
+    NSMutableArray *_sections;
+
+}
+@end
+
 @implementation ViewController
 
+- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{
+
+    return [_sections count];
+
+}
+
 - (NSInteger)collectionView:(UICollectionView *)view numberOfItemsInSection:(NSInteger)section;
 {
-    return 32;
+    return [_sections[section] count];
+}
+
+- (void)loadView{
+    [super loadView];
+
+    _sections = [NSMutableArray array];
+
+    for (NSUInteger i = 0; i < 3; i++) {
+
+        NSMutableArray *tempArray = [NSMutableArray arrayWithArray:@[[NSNull null],[NSNull null],[NSNull null]]];
+
+        [_sections addObject:tempArray];
+    }
+
+}
+
+- (void)viewDidLoad{
+    [super viewDidLoad];
+
+    self.collectionView.allowsMultipleSelection = YES;
+
 }
 
 - (PSUICollectionViewCell *)collectionView:(PSUICollectionView *)cv cellForItemAtIndexPath:(NSIndexPath *)indexPath;
@@ -94,4 +128,42 @@ - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
     }
 }
 
+- (IBAction)delete:(id)sender{
+
+    [self.collectionView performBatchUpdates:^{
+
+        [self.collectionView performBatchUpdates:^{
+
+            NSArray *indexPaths = [self.collectionView indexPathsForSelectedItems];
+
+            NSArray *sortedArray = [indexPaths sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) {
+
+                return [obj2 compare:obj1];
+
+            }];
+
+            [sortedArray enumerateObjectsUsingBlock:^(NSIndexPath *indexPath, NSUInteger idx, BOOL *stop) {
+
+                [_sections[indexPath.section] removeObjectAtIndex:indexPath.item];
+
+            }];
+
+            [self.collectionView deleteItemsAtIndexPaths:indexPaths];
+
+
+
+        } completion:^(BOOL finished) {
+
+            [[self.collectionView indexPathsForSelectedItems] enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
+
+                [self.collectionView deselectItemAtIndexPath:obj animated:NO];
+
+            }];
+
+        }];
+
+    } completion:nil];
+
+}
+
 @end
diff --git a/Examples/CollectionView-Simple/CollectionView/en.lproj/MainStoryboard.storyboard b/Examples/CollectionView-Simple/CollectionView/en.lproj/MainStoryboard.storyboard
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="2.0" toolsVersion="2843" systemVersion="11G63" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" initialViewController="Pxb-db-V9M">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="2.0" toolsVersion="3084" systemVersion="12C60" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" initialViewController="Pxb-db-V9M">
     <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="1929"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="2083"/>
     </dependencies>
     <scenes>
         <!--Navigation Controller-->
@@ -64,7 +64,13 @@
                             <outlet property="delegate" destination="dmE-Kn-TpH" id="pKl-zO-lPR"/>
                         </connections>
                     </collectionView>
-                    <navigationItem key="navigationItem" title="Collection View" id="Qqd-gG-ZaX"/>
+                    <navigationItem key="navigationItem" title="Collection View" id="Qqd-gG-ZaX">
+                        <barButtonItem key="rightBarButtonItem" systemItem="trash" id="8uS-PN-C12">
+                            <connections>
+                                <action selector="delete:" destination="dmE-Kn-TpH" id="QWs-eh-jsA"/>
+                            </connections>
+                        </barButtonItem>
+                    </navigationItem>
                     <simulatedNavigationBarMetrics key="simulatedTopBarMetrics" barStyle="blackOpaque" prompted="NO"/>
                 </collectionViewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="2FN-eK-xyQ" userLabel="First Responder" sceneMemberID="firstResponder"/>
@@ -127,6 +133,9 @@
         </class>
         <class className="ViewController" superclassName="PSUICollectionViewController">
             <source key="sourceIdentifier" type="project" relativePath="./Classes/ViewController.h"/>
+            <relationships>
+                <relationship kind="action" name="delete:"/>
+            </relationships>
         </class>
     </classes>
     <simulatedMetricsContainer key="defaultSimulatedMetrics">