Created
March 27, 2014 05:32
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Multiple CollectionViews Bug - Solution
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| // | |
| // EDSViewController.m | |
| // MultipleCollectionViews | |
| // | |
| // Created by Eduardo Diaz Sancha on 3/26/14. | |
| // Copyright (c) 2014 edsancha. All rights reserved. | |
| // | |
| #import "EDSViewController.h" | |
| #import "EDSCollectionViewCell.h" | |
| #define BUG_SOLUTION 0 | |
| @interface EDSViewController () <UICollectionViewDataSource, UICollectionViewDelegate> | |
| @property (strong, nonatomic) IBOutlet UICollectionView *firstCollectionView; | |
| @property (strong, nonatomic) IBOutlet UICollectionView *secondCollectionView; | |
| @property (strong, nonatomic) IBOutlet UICollectionView *thirdCollectionView; | |
| @property (nonatomic, strong) UICollectionView* selectionBlockedCollectionView; | |
| @property (nonatomic, assign) BOOL selectionBlocked; | |
| @end | |
| @implementation EDSViewController | |
| - (void)viewDidLoad { | |
| [super viewDidLoad]; | |
| // Do any additional setup after loading the view, typically from a nib. | |
| } | |
| - (void)didReceiveMemoryWarning { | |
| [super didReceiveMemoryWarning]; | |
| // Dispose of any resources that can be recreated. | |
| } | |
| #pragma mark - UICollectionViewDataSource | |
| - (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView { | |
| return 1; | |
| } | |
| - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section { | |
| if (collectionView == self.firstCollectionView) { | |
| return 10; | |
| } else if (collectionView == self.secondCollectionView) { | |
| return 15; | |
| } else if (collectionView == self.thirdCollectionView) { | |
| return 20; | |
| } | |
| return 0; | |
| } | |
| - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath { | |
| EDSCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath]; | |
| if (collectionView == self.firstCollectionView) { | |
| cell.defaultColor = [UIColor blueColor]; | |
| } else if (collectionView == self.secondCollectionView) { | |
| cell.defaultColor = [UIColor greenColor]; | |
| } else { | |
| cell.defaultColor = [UIColor redColor]; | |
| } | |
| cell.backgroundColor = cell.defaultColor; | |
| cell.label.text = [NSString stringWithFormat:@"%li",indexPath.row]; | |
| return cell; | |
| } | |
| - (BOOL)collectionView:(UICollectionView *)collectionView shouldHighlightItemAtIndexPath:(NSIndexPath *)indexPath { | |
| NSLog(@"%s", __PRETTY_FUNCTION__); | |
| #if BUG_SOLUTION | |
| if (!self.selectionBlocked){ | |
| self.selectionBlocked = YES; | |
| self.selectionBlockedCollectionView = collectionView; | |
| return YES; | |
| } else { | |
| return NO; | |
| } | |
| #endif | |
| return YES; | |
| } | |
| - (void)collectionView:(UICollectionView *)collectionView didHighlightItemAtIndexPath:(NSIndexPath *)indexPath { | |
| NSLog(@"%s", __PRETTY_FUNCTION__); | |
| } | |
| - (void)collectionView:(UICollectionView *)collectionView didUnhighlightItemAtIndexPath:(NSIndexPath *)indexPath { | |
| NSLog(@"%s", __PRETTY_FUNCTION__); | |
| #if BUG_SOLUTION | |
| self.selectionBlocked = NO; | |
| #endif | |
| } | |
| - (BOOL)collectionView:(UICollectionView *)collectionView shouldSelectItemAtIndexPath:(NSIndexPath *)indexPath { | |
| NSLog(@"%s", __PRETTY_FUNCTION__); | |
| #if BUG_SOLUTION | |
| return (self.selectionBlockedCollectionView == collectionView); | |
| #endif | |
| return YES; | |
| } | |
| - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath { | |
| NSLog(@"%s", __PRETTY_FUNCTION__); | |
| #if BUG_SOLUTION | |
| self.selectionBlockedCollectionView = nil; | |
| #endif | |
| [collectionView deselectItemAtIndexPath:indexPath animated:YES]; | |
| UIViewController *viewController = [self.storyboard instantiateViewControllerWithIdentifier:@"viewController"]; | |
| if (collectionView == self.firstCollectionView) { | |
| viewController.title = @"From First CollectionView"; | |
| viewController.view.backgroundColor = [UIColor blueColor]; | |
| } else if (collectionView == self.secondCollectionView) { | |
| viewController.title = @"From Second CollectionView"; | |
| viewController.view.backgroundColor = [UIColor greenColor]; | |
| } else { | |
| viewController.title = @"From Third CollectionView"; | |
| viewController.view.backgroundColor = [UIColor redColor]; | |
| } | |
| [self.navigationController pushViewController:viewController animated:YES]; | |
| } | |
| @end |
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