UICollectionView 不显示单元格 [英] UICollectionView don't show the cell

问题描述

UIViewController 包含 UICollectionView.还有 UICollectionViewCell 有自己的类 &XIB (CurrentCell.h, CurrentCell.m, CurrentCell.xib).

There is UIViewController which contain UICollectionView. Also there is UICollectionViewCell which has own class & XIB (CurrentCell.h, CurrentCell.m, CurrentCell.xib).

在我的 UIViewController.h 中:

@property (strong, nonatomic) IBOutlet UICollectionView *collection;

在我的 UIViewController.m 中:

@synthesize collection;

在viewDidLoad中:

[self.collection registerClass:[CurrentCell class] forCellWithReuseIdentifier:@"cellCurRecipe"];

UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc] init];
[flowLayout setItemSize:CGSizeMake(120, 90)];
[flowLayout setSectionInset:UIEdgeInsetsMake(5, 10, 5, 10)];
[flowLayout setScrollDirection:UICollectionViewScrollDirectionHorizontal];
[self.collection setCollectionViewLayout:flowLayout];

在cellForItemAtIndexPath中:

static NSString *CellIdentifier = @"cellCurRecipe";    
CurrentCell *cell = (CurrentCell *)[self.collection dequeueReusableCellWithReuseIdentifier:CellIdentifier forIndexPath:indexPath];   
Recipes *recipe = [currRecipesArray objectAtIndex:indexPath.item];  
[cell.image setImage: recipe.image]; 
return cell;

但是:如果我直观地点击单元格 didSelectItemAtIndexPath 方法调用.

But: if I tap intuitively to the cell didSelectItemAtIndexPath method calls.

已编辑

现在一切正常！

我忘记在 CurrentCell.m 中初始化单元格:

I forgot to init the cell in CurrentCell.m:

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
        NSArray *arrayOfViews = [[NSBundle mainBundle] loadNibNamed:@"CurrentCell" owner:self options:nil];

        if ([arrayOfViews count] < 1) {
            return nil;
        }

        if (![[arrayOfViews objectAtIndex:0] isKindOfClass:[UICollectionViewCell class]]) {
            return nil;
        }

        self = [arrayOfViews objectAtIndex:0];
    }
    return self;
}

推荐答案

注册笔尖，而不是类.如果单元格完全在代码中制作，您应该只需要注册一个类.如果您使用 xib，请注册(使用 registerNib:forCellWithReuseIdentifier:).如果您在故事板中制作单元格，则不要注册任何内容.

Register the nib, not the class. You should only need to register a class if the cell is made completely in code. If you use a xib, then register that (with registerNib:forCellWithReuseIdentifier:). If you make the cell in a storyboard, then don't register anything.

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