UICollectionView不顯示

Question

我試圖從UICollectionView文件目錄顯示圖像的任何圖像，一切工作正常，但似乎沒有圖像

- (void)viewDidLoad 

{ 

    [super viewDidLoad]; 

    // Initialize recipe image array 

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 

    NSString *documentsDirectory = [paths objectAtIndex:0]; 



    NSArray *dirContents = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:documentsDirectory error:nil]; 


    NSMutableArray *image = [NSMutableArray array]; 


    for (NSString *tString in dirContents) { 

     if ([tString hasSuffix:@".png"]) { 

      [image addObject:tString]; 


      listeImages = [NSArray arrayWithArray:image]; 


     } 

    } 


} 


- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{ 

    return listeImages.count; 



} 


- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{ 

    static NSString *identifier = @"Cell"; 

    UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath]; 



    UIImageView *listeImageView = (UIImageView *)[cell viewWithTag:100]; 

    UILabel *LabelView = (UILabel *)[cell viewWithTag:110]; 

    LabelView.text = [listeImages objectAtIndex:indexPath.row]; 

    listeImageView.image = [UIImage imageNamed:[listeImages objectAtIndex:indexPath.row]]; 

    NSLog(@" List UIImageView listeImageView.image %@",listeImageView.image); 

cell.backgroundColor =的UIColor redColor]

cell.backgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"photo-frame.png"]]; 



    NSLog(@" List NSArray *listeImages %@",listeImages); 

    cell.tag = indexPath.row; 

    return cell; 

} 

與此一段代碼，顯示正確的UICollectionView的UILabel良好，但不顯示圖像。

我使用這行代碼將我的圖像存儲在listeImageView.image中。

UIImageView *listeImageView = (UIImageView *)[cell viewWithTag:100]; 
    listeImageView.image = [UIImage imageNamed:[listeImages objectAtIndex:indexPath.row]]; 

這裏是我的NSLog的結果：

2014-10-11 09:46:31.117 imgapp[2803:60b] List NSArray *listeImages; (
    "image10102014233607.png", 
    "image10102014233616.png", 
    "image10102014233627.png" 
) 
2014-10-11 09:46:31.158 imgapp[2803:60b] List UIImageView listeImageView.image (null) 
2014-10-11 09:46:31.171 imgapp[2803:60b] List UIImageView listeImageView.image (null) 
2014-10-11 09:46:31.178 imgapp[2803:60b] List UIImageView listeImageView.image (null) 

任何幫助將不勝感激。

感謝

Answer 1

你不加入你的listeImageView任何東西。 與

[cell addSubview:listeImageView]; 

嘗試它，或者如果你真的想成爲backgroundView

cell.backgroundView = listeImageView; 

但它會是乾淨多了，如果你創建一個自定義UICollectionViewCell級，你可以定義哪些內容該細胞有。

Answer 2

您擁有以下，

listeImageView.image = [UIImage imageNamed:[listeImages objectAtIndex:indexPath.row]]; 

但你這樣做，

cell.backgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"photo-frame.png"]]; 

爲什麼你不使用如下的listeImageView： -

cell.backgroundView = listeImageView; 

這應該讓你的形象。

更新： -

for (NSString *tString in dirContents) { 

    if ([tString hasSuffix:@".png"]) { 

       **[image addObject:[UIImage imageWithContentsOfFile:tString] ]; //Do this as in below line you were not create a image object which you are trying to get.** 

     //Also check your image array for object, that is it getting stored or not. 
     //  [image addObject:tString]; 

    } 

} 

listeImages = [NSArray arrayWithArray:image]; //Do this after you have added all objects in your image mutable array and not in for loop as this will initialise it many tiems depending on your loop run count. 

Answer 3

具有u想給背景色而不是細胞backgroundview.do的，一旦如果有可能與你的相同的代碼！你可以嘗試像這樣：-UIImageView * listeImageView =（UIImageView *）[cell viewWithTag：100]; [cell bringviewtoFront：listeImageView];

Answer 4

你可以在子類化UICollectionViewCell，並在故事板中設置子視圖好多了。您的代碼可能會更清潔這種方式：

static NSString *kCustomCellIdentifier = @"customcell"; 

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath 
{ 
    MYAPPCustomCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:kCustomCellIdentifier forIndexPath:indexPath]; 

    // Load custom image 
    NSString *imageName = [listeImages objectAtIndex:indexPath.row]; 
    if (imageName) 
    { 
     UIImage *image = [UIImage imageNamed:imageName]; 
     if (image) 
     { 
      cell.customImageView.image = image; 
     } 
     else 
     { 
      // Set an empty state here 
      cell.customImageView.image = [UIImage imageNamed:@"errorImage.png"]; 
     } 
    } 

    return cell; 
}