UICollectionViewController의 ALAssets에 이미지가 표시되지 않습니다.

Question

collectionViewCell의 각 항목에있는 장치 갤러리에서 ALAssets 목록을 표시하는 데 문제가 있습니다.

내 이미지가 컬렉션보기에 표시되지 않습니다. 나는 친척 게시물에서 찾은 모든 해결책을 시도했지만 대답을 찾지 못했습니다 ... 왜? ARC & 스토리 보드를 사용하여

아이폰 5, IOS 6.0.2, 엑스 코드 4.5, :

여기 내 dev에 환경입니다.

#의 AppDelegate.m

-(void)loadPhotosFromDevice 
{ 
    //deviceMedia = [[NSMutableArray alloc] init]; 
    ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init]; 

    // Enumerate just the photos and videos group by using ALAssetsGroupSavedPhotos. 
    if([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) 
    { 
     [library enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos  usingBlock:^(ALAssetsGroup *group, BOOL *stop) 
     { 
      // Within the group enumeration block, filter if necessary 
      [group setAssetsFilter:[ALAssetsFilter allPhotos]]; 
      [group enumerateAssetsUsingBlock:^(ALAsset *alAsset, NSUInteger index,  BOOL *innerStop) 
       { 
        // The end of the enumeration is signaled by asset == nil. 
        if (alAsset) 
        { 
         ALAssetRepresentation *representation = [alAsset defaultRepresentation]; 

         [self addPhoto:representation andAsset:alAsset]; 
        } 
        else 
        { 
         //NSLog(@"Done! Count = %d", deviceMedia.count); 
         //Do something awesome 
        } 
       }]; 
     } 
          failureBlock: ^(NSError *error) { 
           // Typically you should handle an error more gracefully than this. 
           NSLog(@"No groups"); 
          }]; 
    } 
} 

2 : 내 위임에 장치 미디어로 MutableArray를 가져

: 1. 먼저, 여기

그리고

내 코드입니다 . "Media"객체 클래스에 "AddPhoto"메서드를 사용하여 모든 데이터를 보냅니다.

,210

#의 AppDelegate.m

-(void)addPhoto:(ALAssetRepresentation *)asset andAsset:alAsset 
    { 
    //NSLog(@"Adding photo!"); 

    Media *media = [[Media alloc] init]; 
    media.baseurl = @""; 
    media.url = [asset.url absoluteString]; 

    Thumbnail *t = [[Thumbnail alloc] init]; 
    t.rep = asset; 
    t.url = [asset.url absoluteString]; 

    media.thumbnails = [[Thumbnail alloc] initWithRepresentation:asset]; 
    media.name = asset.filename; 
    media.asset = alAsset; 
    media.isFromDevice = YES; 
    [getPhotos addObject:media]; 
    NSLog(@"\nDevice Photo added array"); 
    } 

# Media.h

import <AssetsLibrary/AssetsLibrary.h> 

@interface Media : NSObject 
{ 
    //General 
    AudioInfo *audioInfo; 
    Info *info; 
    Header *header; 
    Status *requestStatus; 
    Exif *exif; 
    Thumbnail *thumbnails; 
    NSString *name; 
    NSString *uploaddt; 
    NSString *baseurl; 
    NSString *url; 
    NSString *createdt; 
    NSString *takendt; 
    NSString *recorddt; 
    ALAsset *asset; 
    bool isFromDevice; 
} 
//General 

    @property (nonatomic, retain) Thumbnail *thumbnails; 
    @property (nonatomic, retain) Status *requestStatus; 
    @property (nonatomic, retain) NSString *name; 
    @property (nonatomic, retain) NSString *uploaddt; 
    @property (nonatomic, retain) NSString *baseurl; 
    @property (nonatomic, retain) NSString *url; 
    @property (nonatomic, retain) NSString *createdt; 
    @property (nonatomic, retain) NSString *takendt; 
    @property (nonatomic, retain) NSString *recorddt; 
    @property (nonatomic, retain) ALAsset *asset; 
    @property (nonatomic, readwrite) bool isFromDevice; 

@end 

3. 그런 다음 나는 CollectionViewController에이를 표시 :

#PhotoDisplayCloudViewController

,

@implementation PhotoDisplayCloudViewController 

- (void)viewDidLoad { 
    AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate]; 
    tableau = appDelegate.getPhotos; 
    [super viewDidLoad]; 
} 

- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{ 
    return 1; 
} 

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{ 
    return tableau.count; 
} 

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{ 
    //CELL 
    UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"cell" forIndexPath:indexPath]; 
    Media *object = [[Media alloc] init]; 
    object = [tableau objectAtIndex:indexPath.row]; 

    //IMAGE 
    NSString *url = [NSString stringWithFormat:@"%@%@", object.baseurl, object.thumbnails.url]; 
    NSLog(@"%@ start loading", object.name); 
    UIImageView *image = [[UIImageView alloc] init]; 
    if (object.isFromDevice) 
    {  
     image = [[UIImageView alloc] initWithImage:[UIImage imageWithCGImage :[object.asset.self thumbnail]]];   
    } 
    else 
    { 
     image = [[UIImageView alloc] initWithImage:[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString: url]]]]; 
    } 
    [image setFrame:CGRectMake(image.frame.origin.x, image.frame.origin.y, 72, 72)]; 

    //LABEL 
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(image.frame.origin.x+6, image.frame.origin.y+58, 60, 12)]; 
    label.textAlignment = NSTextAlignmentCenter; 
    label.textColor = UIColor.blackColor; 
    label.contentMode = UIViewContentModeBottom; 
    label.font = [UIFont fontWithName:@"Times New Roman" size:9]; 
    label.text = object.name; 

    //ADD VIEWS 

    [cell addSubview:image]; 
    [cell addSubview:label]; 
    NSLog(@"%@ end loading", object.name); 

    return cell; 
} 

- (void)didGrabImage:(UIImage *)image { 
    [collectionCell addSubview:image]; 
} 

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath 
{ 
    PhotoDetailViewController *photoDetailViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"photoDetail"]; 
    photoDetailViewController.MaPhoto=[tableau objectAtIndex:indexPath.row]; 
    [self.navigationController pushViewController:photoDetailViewController animated:YES]; 

} 
@end 

나에게 명확 ^^

사전 들으 답변 해주세요! "adaydesign의 블로그"에

덕분에, 나는있는 UIImageView에 내 자산을로드하는 데이 방법을 사용 :

Answer 1

나는 내 문제에 대한 답을 발견 그것은 완벽하게 작동

!

-(void)loadPhotoFromURL:(NSURL*)imgURL thumbnail:(BOOL)useThumbnail showIn:(UIImageView*)imView{ 

    if (imgURL!=nil) { 

     ALAssetsLibraryAssetForURLResultBlock resultBlock = ^(ALAsset *myasset){ 

      CGImageRef iref; 

      if (useThumbnail) { 

       iref = [myasset thumbnail]; 

      }else { 

       ALAssetRepresentation *rep = [myasset defaultRepresentation]; 

       iref = [rep fullScreenImage]; 

      } 

      if (iref) { 

       UIImage *resPhoto = [UIImage imageWithCGImage:iref]; 

        //NSLog(@"photo size:%f x %f",resPhoto.size.width,resPhoto.size.height); 

       imView.image = resPhoto; 

       } 

     };//end result block 


     ALAssetsLibraryAccessFailureBlock failureBlock = ^(NSError *error){ 

      NSLog(@"error...."); 

     };//end failureBlock 


     ALAssetsLibrary *assetLib = [[[ALAssetsLibrary alloc] init] autorelease]; 

     [assetLib assetForURL:imgURL 

        resultBlock:resultBlock 

       failureBlock:(ALAssetsLibraryAccessFailureBlock)failureBlock]; 

     }//end if 

}//end function