Create YTPivotBarReorder.m

Sources/YTPivotBarReorder.m

@@ -0,0 +1,73 @@
+#import "YTPivotBarReorder.h"
+#import "uYouPlus.h"
+
+@interface YTPivotBarReorder ()
+
+@property (strong, nonatomic) UICollectionView *collectionView;
+@property (strong, nonatomic) NSMutableArray *pivotBarItems;
+
+@end
+
+@implementation YTPivotBarReorder
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    self.title = @"Reorder Pivot Bar Icons";
+    self.view.backgroundColor = [UIColor systemBackgroundColor];
+    
+    UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc] init];
+    layout.itemSize = CGSizeMake(100, 100);
+    layout.scrollDirection = UICollectionViewScrollDirectionHorizontal;
+    
+    self.collectionView = [[UICollectionView alloc] initWithFrame:self.view.bounds collectionViewLayout:layout];
+    self.collectionView.delegate = self;
+    self.collectionView.dataSource = self;
+    self.collectionView.dragDelegate = self;
+    self.collectionView.dropDelegate = self;
+    self.collectionView.dragInteractionEnabled = YES;
+    [self.collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"Cell"];
+    [self.view addSubview:self.collectionView];
+    
+    self.pivotBarItems = [@[@"Home", @"Shorts", @"Subscriptions", @"Notifications", @"Library"] mutableCopy];
+}
+
+- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
+    return self.pivotBarItems.count;
+}
+
+- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
+    UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath];
+    UILabel *label = [[UILabel alloc] initWithFrame:cell.contentView.bounds];
+    label.text = self.pivotBarItems[indexPath.row];
+    label.textAlignment = NSTextAlignmentCenter;
+    [cell.contentView addSubview:label];
+    return cell;
+}
+
+- (NSArray<UIDragItem *> *)collectionView:(UICollectionView *)collectionView itemsForBeginningDragSession:(id<UIDragSession>)session atIndexPath:(NSIndexPath *)indexPath {
+    NSItemProvider *itemProvider = [[NSItemProvider alloc] initWithObject:self.pivotBarItems[indexPath.row]];
+    UIDragItem *dragItem = [[UIDragItem alloc] initWithItemProvider:itemProvider];
+    dragItem.localObject = self.pivotBarItems[indexPath.row];
+    return @[dragItem];
+}
+
+- (void)collectionView:(UICollectionView *)collectionView performDropWithCoordinator:(id<UICollectionViewDropCoordinator>)coordinator {
+    NSIndexPath *destinationIndexPath = coordinator.destinationIndexPath;
+    if (!destinationIndexPath) {
+        destinationIndexPath = [NSIndexPath indexPathForRow:self.pivotBarItems.count - 1 inSection:0];
+    }
+
+    for (id<UICollectionViewDropItem> dropItem in coordinator.items) {
+        NSIndexPath *sourceIndexPath = dropItem.sourceIndexPath;
+        if (sourceIndexPath) {
+            [collectionView performBatchUpdates:^{
+                id item = self.pivotBarItems[sourceIndexPath.row];
+                [self.pivotBarItems removeObjectAtIndex:sourceIndexPath.row];
+                [self.pivotBarItems insertObject:item atIndex:destinationIndexPath.row];
+                [collectionView moveItemAtIndexPath:sourceIndexPath toIndexPath:destinationIndexPath];
+            } completion:nil];
+        }
+    }
+}
+
+@end