CollectionViewController DetailViewController의 속성을 보지 못했습니다.

Question

저는 초보자이며, 왜 CollectionViewController가 DetailViewController의 속성을 보지 못하고 있는지 이해하려고합니다 ... 어떤 조언이나 통찰력도 인정 될 것입니다. 아래의 코드 ... 각각 내 detailViewController.h 및 내 CollectionViewController.m입니다.

// DetailViewController.h 
// RecipePhoto 
// 


#import <UIKit/UIKit.h> 

@interface DetailViewController : UIViewController 

@property (weak, nonatomic) IBOutlet UIImageView *recipeImageView; 
@property (nonatomic) NSString *recipeImageName; 
- (IBAction)close:(id)sender; 

@end 


#import "RecipeCollectionViewController.h" 
#import "DetailViewController.h". 

@interface RecipeCollectionViewController() <UICollectionViewDataSource, UICollectionViewDelegate> 
{ 
    NSArray *recipeImages; 
} 
@end 

@implementation RecipeCollectionViewController 

static NSString * const reuseIdentifier = @"Cell"; 

- (void)viewDidLoad { 
    [super viewDidLoad]; 

    recipeImages = [NSArray arrayWithObjects:@"angry_birds_cake.jpg", @"creme_brelee.jpg", @"egg_benedict.jpg", @"full_breakfast.jpg", @"green_tea.jpg", @"ham_and_cheese_panini.jpg", @"ham_and_egg_sandwich.jpg", @"hamburger.jpg", @"instant_noodle_with_egg.jpg", @"japanese_noodle_with_pork.jpg", @"mushroom_risotto.jpg", @"noodle_with_bbq_pork.jpg", @"starbucks_coffee.jpg", @"thai_shrimp_cake.jpg", @"vegetable_curry.jpg", @"white_chocolate_donut.jpg", nil]; 
    } 


// In a storyboard-based application, you will often want to do a little preparation before navigation 
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { 

if ([segue.identifier isEqualToString:@"showRecipePhoto"]) { 
NSArray *indexPaths = [self.collectionView indexPathsForSelectedItems]; 

     // Get the new view controller using [segue destinationViewController]. 

    DetailViewController *detailViewController = [segue destinationViewController]; 
NSIndexPath *indexPath = [indexPaths objectAtIndex:0]; 

    // Pass the selected object to the new view controller. 
    DetailViewController.recipeImageName = [recipeImages[indexPath.section] objectAtIndex:indexPath.row]; 
[self.collectionView deselectItemAtIndexPath:indexPath animated:NO]; 
} 
} 

#pragma mark <UICollectionViewDataSource> 

- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView { 
    //return arrayName.count; 
    return 1; 
} 

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section { 
    return recipeImages.count; 
} 
//provides the data for the collection view cells 
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath { 
    UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath]; 

    // Configure the cell 
    UIImageView *recipeImageView = (UIImageView *)[cell viewWithTag:100]; 
    recipeImageView.image = [UIImage imageNamed:[recipeImages objectAtIndex:indexPath.row]]; 

    return cell; 
} 

Answer 1

당신은 prepareForSegue에서 클래스 속성으로 recipeImageName을 사용하려고 :

DetailViewController.recipeImageName = [recipeImages[indexPath.section] objectAtIndex:indexPath.row]; 

은 첫 글자의 대소에

detailViewController.recipeImageName = [recipeImages[indexPath.section] objectAtIndex:indexPath.row]; 

지불 세심한주의를해야한다. DetailViewController이 클래스입니다. detailViewController은 지역 변수입니다.