单击CollectionViewCell将显示先前选定的单元格而不是当前单元格
我有一个问题，当我点击一个单元格时，没有任何反应，当我点击第二个单元格显示前一个单元格（或我先点击的那个）的数据时，我认为它显示错误的索引.item（在详细视图中）
#define API_V3_CHANNEL_URL @"examples.json" @interface MSContestListViewController () @end @implementation MSContestListViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. CGRect frame = CGRectMake(0.0, 0.0, self.view.frame.size.width, self.view.frame.size.height); NSArray *colors = [[NSArray alloc] initWithObjects: [UIColor colorWithRed:1 green:0.529 blue:0.357 alpha:1.0], [UIColor colorWithRed:1 green:0.439 blue:0.357 alpha:1.0], [UIColor colorWithRed:0.937 green:0.302 blue:0.357 alpha:1.0], [UIColor colorWithRed:0.737 green:0.212 blue:0.357 alpha:1.0], nil]; CAGradientLayer *gradient = [DREasyGradient gradientWithFrame:frame orientation:DRHorizontalGradient colors:colors]; [self.view.layer insertSublayer:gradient atIndex:0]; _segmentedControl.backgroundColor = [UIColor colorWithWhite:1.0 alpha:0.2]; [self fetchEntries]; [self fetchEntriesWinner]; [self fetchEntriesPhotos]; } - (void)fetchEntries { NSString *searchURL = [API_V3_CHANNEL_URL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; NSData *searchData = [NSData dataWithContentsOfURL:[NSURL URLWithString:searchURL]]; NSDictionary *searchDict =[NSJSONSerialization JSONObjectWithData:searchData options:NSJSONReadingMutableContainers error:nil]; //self.readArray = [searchDict objectForKey:@"CONTESTS"]; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"status == %@", @"LIVE"]; self.readArray = [[searchDict objectForKey:@"CONTESTS"] filteredArrayUsingPredicate:predicate]; NSLog(@"%@", self.readArray); } - (void)fetchEntriesWinner { NSString *searchURL = [API_V3_CHANNEL_URL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; NSData *searchData = [NSData dataWithContentsOfURL:[NSURL URLWithString:searchURL]]; NSDictionary *searchDict =[NSJSONSerialization JSONObjectWithData:searchData options:NSJSONReadingMutableContainers error:nil]; //self.readArray = [searchDict objectForKey:@"CONTESTS"]; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"status == %@", @"ARCHIVED"]; self.readArrayWinner = [[searchDict objectForKey:@"CONTESTS"] filteredArrayUsingPredicate:predicate]; NSLog(@"winner array : %@", self.readArrayWinner); } - (void)fetchEntriesPhotos { NSString *searchURL = [API_V3_CHANNEL_URL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; NSData *searchData = [NSData dataWithContentsOfURL:[NSURL URLWithString:searchURL]]; NSDictionary *searchDict =[NSJSONSerialization JSONObjectWithData:searchData options:NSJSONReadingMutableContainers error:nil]; //self.readArray = [searchDict objectForKey:@"CONTESTS"]; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"status == %@", @"LIVE"]; self.readArrayPhotos = [[searchDict objectForKey:@"CONTESTS"] filteredArrayUsingPredicate:predicate]; NSLog(@"%@", self.readArray); } - (IBAction)segmentedControlAction:(id)sender { switch(_segmentedControl.selectedSegmentIndex) { case 0: if(self.readArray.count == 0) { [self fetchEntries]; } else { [self.collectionView reloadData]; } break; case 1: if(self.readArrayWinner.count == 0) { [self fetchEntriesWinner]; } else { [self.collectionView reloadData]; } break; case 2: if(self.readArrayPhotos.count == 0) { [self fetchEntriesPhotos]; } else { [self.collectionView reloadData]; } break; default: break; } } - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section { switch (_segmentedControl.selectedSegmentIndex) { case 0: return [self.readArray count]; break; case 1: return [self.readArrayWinner count]; break; case 2: return [self.readArrayPhotos count]; break; default: break; } return 0; } - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"pictureCell"; MSContestListCollectionViewCell *cell = (MSContestListCollectionViewCell *)[self.collectionView dequeueReusableCellWithReuseIdentifier:CellIdentifier forIndexPath:indexPath]; cell.titleContest.adjustsFontSizeToFitWidth = YES; cell.titleContest.minimumScaleFactor = 0.5; cell.pictureImageView.layer.cornerRadius = 5; cell.pictureImageView.clipsToBounds = YES; cell.titleView.layer.cornerRadius = 5; cell.titleView.clipsToBounds = YES; switch (_segmentedControl.selectedSegmentIndex) { case 0: { NSDictionary *searchResult = [self.readArray objectAtIndex:indexPath.item]; NSString *stringImage = [searchResult objectForKey:@"featuredImage"]; NSString *image = [NSString stringWithFormat:@"https://srv.mediaswapp.com/%@", stringImage]; [cell.pictureImageView sd_setImageWithURL:[NSURL URLWithString:image] placeholderImage:[UIImage imageNamed:@"placeholder.png"]]; cell.titleContest.text = [searchResult objectForKey:@"description"]; cell.statusContest.text = [searchResult objectForKey:@"status"]; break; } case 1: { NSDictionary *searchResult2 = [self.readArrayWinner objectAtIndex:indexPath.item]; NSString *stringImage = [searchResult2 objectForKey:@"featuredImage"]; NSString *image = [NSString stringWithFormat:@"https://srv.mediaswapp.com/%@", stringImage]; [cell.pictureImageView sd_setImageWithURL:[NSURL URLWithString:image] placeholderImage:[UIImage imageNamed:@"placeholder.png"]]; cell.titleContest.text = [searchResult2 objectForKey:@"description"]; cell.statusContest.text = [searchResult2 objectForKey:@"status"]; break; } case 2: { NSDictionary *searchResult3 = [self.readArrayPhotos objectAtIndex:indexPath.item]; NSString *stringImage = [searchResult3 objectForKey:@"featuredImage"]; NSString *image = [NSString stringWithFormat:@"https://srv.mediaswapp.com/%@", stringImage]; [cell.pictureImageView sd_setImageWithURL:[NSURL URLWithString:image] placeholderImage:[UIImage imageNamed:@"placeholder.png"]]; cell.titleContest.text = [searchResult3 objectForKey:@"description"]; cell.statusContest.text = [searchResult3 objectForKey:@"status"]; break; } default: break; } return cell; } - (void)collectionView:(UICollectionView *)collectionView didDeselectItemAtIndexPath:(NSIndexPath *)indexPath { NSDictionary *searchResult = [self.readArray objectAtIndex:indexPath.item]; NSString *videoID = [searchResult objectForKey:@"description"]; NSString *stringImage = [searchResult objectForKey:@"featuredImage"]; NSString *image = [NSString stringWithFormat:@"https://srv.mediaswapp.com/%@", stringImage]; UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"Main" bundle: nil]; MSContestDetailViewController *yourController = (MSContestDetailViewController *)[mainStoryboard instantiateViewControllerWithIdentifier:@"contestDetailViewController"]; yourController.urlImage = image; yourController.contestName = videoID; yourController.contestTime = [searchResult objectForKey:@"drawDate"]; [self.navigationController pushViewController:yourController animated:YES]; } @end 您应该使用didSelectItemAtIndexPath函数而不是didDeselectItemAtIndexPath ：
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath { NSDictionary *searchResult = [self.readArray objectAtIndex:indexPath.item]; NSString *videoID = [searchResult objectForKey:@"description"]; NSString *stringImage = [searchResult objectForKey:@"featuredImage"]; NSString *image = [NSString stringWithFormat:@"https://srv.mediaswapp.com/%@", stringImage]; UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"Main" bundle: nil]; MSContestDetailViewController *yourController = (MSContestDetailViewController *)[mainStoryboard instantiateViewControllerWithIdentifier:@"contestDetailViewController"]; yourController.urlImage = image; yourController.contestName = videoID; yourController.contestTime = [searchResult objectForKey:@"drawDate"]; [self.navigationController pushViewController:yourController animated:YES]; }
否则，当您第一次触摸某个项目时，没有任何反应，因为取消选择了该项目。 然后，当您单击第二个项目时，第二个项目将被选中，但第一个项目将被选中，这将调用您当前的实现。 但实际上，您希望所有代码都在初始选择而不是取消选择时发生 。