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• ホームスクリーンから、ユーザーが頻繁することを素早く行うことが可能

• 最後に閲覧したデータに、一回でアクセスするような機能を提供することが可能

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• 画面遷移せずとも、コンテンツをプレビューすることが可能

• 一回一回画面遷移して戻るを繰り返さなくても、内容を覗けるので内容を素早く確認可能

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if ([self.traitCollection respondsToSelector:@selector(forceTouchCapability)] && self.traitCollection.forceTouchCapability ==UIForceTouchCapabilityAvailable) { self.previewingContext = [self registerForPreviewingWithDelegate:self sourceView:self.collectionView]; }

- (UIViewController *)previewingContext:(id<UIViewControllerPreviewing>)previewingContext viewControllerForLocation:(CGPoint)location { UICollectionView *collectionView = self.collectionView; NSIndexPath *indexPath = [collectionView indexPathForItemAtPoint:location]; if (!indexPath) { return nil; } if (![self collectionView:collectionView shouldSelectItemAtIndexPath:indexPath]) { return nil; }

UICollectionViewCell *cell = [collectionView cellForItemAtIndexPath:indexPath]; previewingContext.sourceRect = cell.frame; // [...] }

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- (UIViewController *)previewingContext:(id<UIViewControllerPreviewing>)previewingContext viewControllerForLocation:(CGPoint)location { // [...] UICollectionViewCell *cell = [collectionView cellForItemAtIndexPath:indexPath]; previewingContext.sourceRect = cell.frame; [cell resetAllGestures]; // <- // [...] } // [...] - (void)resetAllGestures { NSMutableArray *gestures = [NSMutableArray arrayWithArray:self.tileItemView.gestureRecognizers]; [gestures addObjectsFromArray:self.listItemView.gestureRecognizers]; for (UIGestureRecognizer *recognizer in gestures) { recognizer.enabled = NO; recognizer.enabled = YES; } }

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