UICollectionView并使用Parse推送到detailViewController
我使用tapGesture方法将图像从UICollectionView包装到detailViewController viewController.h中，如下所示：
#import <Parse/Parse.h> @interface CardsViewController : UIViewController <UICollectionViewDelegateFlowLayout> { NSMutableArray *allImages; NSArray *cardFileArray; } @property (weak, nonatomic) IBOutlet UICollectionView *imageCollection 和viewController.m如下
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView { return 1; } - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{ return [cardFileArray count]; } - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath { static NSString *identifier = @"MyCell"; Cards *cell = (Cards *)[collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath]; PFObject *imageObject = [cardFileArray objectAtIndex:indexPath.row]; PFFile *imageFile = [imageObject objectForKey:KEY_IMAGE4]; cell.spinController.hidden = NO; [cell.spinController startAnimating]; [imageFile getDataInBackgroundWithBlock:^(NSData *data, NSError *error) { if (!error) { cell.imageView.image = [UIImage imageWithData:data]; [cell.spinController stopAnimating]; cell.spinController.hidden = YES; } }]; return cell; } - (void)singleTapGestureCaptured:(UITapGestureRecognizer *)gesture{ CGPoint touchPoint = [gesture locationInView:imageCollection]; NSUInteger touchPage = floorf(touchPoint.x / imageCollection.frame.size.width); NSIndexPath *indexPath = [imageCollection indexPathForItemAtPoint:touchPoint]; if (indexPath == nil) { touchPage = touchPage % ([allImages count]); } //Push the image to another view detailViewController*ptvc = [self.storyboard instantiateViewControllerWithIdentifier:@"imageDetail"]; [self.navigationController pushViewController:ptvc animated:YES]; ptvc.imageString = [cardFileArray objectAtIndex:touchedPage]; }
detailViewController.h如下
@property (strong, nonatomic) IBOutlet UIImageView *Preview; @property (strong, nonatomic) UIImage *imagePreview;
所以为DetailViewController我把viewDidload这一行
- (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. //self.imageView.image = [UIImage imageNamed:self.imageViewDetail]; self.Preview.image = self.imagePreview; }
但该应用程序崩溃并在viewDidload上标记行; 所以任何意见，我需要puch的uicollectionView到detailView的形象
首先要解决这个问题，你需要从parsing中识别didselect中的图像，并声明segue以及以下内容
[self performSegueWithIdentifier:@"showDetails" sender:imageCollection]; PFObject *object = [cardFileArray objectAtIndex:indexPath.row]; PFFile *file = [object objectForKey:KEY_IMAGE4]; [file getDataInBackgroundWithBlock:^(NSData *data, NSError *error) { if (!error) { Cards *recipe = [[Cards alloc] init]; recipe.imageView.image = [UIImage imageWithData:data]; } }];
那么你执行Segue方法，并像正常的链接到详细视图，而不是以下
链接你segue到“你的细胞”和cellview中的imageview
最后，将你的单元格导入到详细视图中，并在头文件中声明它（这将链接到你的segue）
我希望这能帮到您
两件事情
-
删除轻拍手势识别器并使用
-(void) collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath -
我看到你正在使用故事板..只需连接两个视图控制器推推。 将一个UIImage设置为detailViewController的属性
-(void) collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath { //store indexPath.row to a variable accessible outside this function selectedRow = indexPath.row; [self performSegueWithIdentifier:@"detail" sender:nil]; } - (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { DetailViewController *detail = [segue destinationViewController]; [detail setImageForDetail:[UIImage imageWithData:[allImages objectAtIndex:selectedRow]]]; //imageArray is the array used to populate the imageCollectionView and i assume they are stored as NSDATA }
在DetailViewController.h中添加
@property (strong,nonatomic) UIImage *imageForDetail;
在DetailViewController.m中添加viewDidLoad，
self.Preview.image = self.imageForDetail;