UICollectionView 单元格布局不正确

Question

我对@9​​87654322@ 很陌生。我正在制作universal app。我想要的是在 iPad 上每行有 2 个单元格。但在 iPhone 上，每一行只有一个单元格。我能够正确设置 iPad 版本。但我无法理解 iPhone 的设置。

这是目前的设置。你可以在我的storyboard 上看到它看起来还不错。但是当我运行它时，我看到每行仍然有两个单元格。

有人可以帮我解决这个问题吗？

亲切的问候

Answer 1

    - (void)viewDidLoad
    {
        [super viewDidLoad];

        [self.collectionView registerClass:[CVCell class] forCellWithReuseIdentifier:@"cvCell"];

        // Configure layout
        UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc] init];
        [flowLayout setItemSize:CGSizeMake(100, 100)];
        [flowLayout setScrollDirection:UICollectionViewScrollDirectionHorizontal];
        [self.collectionView setCollectionViewLayout:flowLayout];


    }
    -(void)viewWillAppear:(BOOL)animated {

        [super viewWillAppear:animated];
        deviceModel = (NSString*)[UIDevice currentDevice].model;
        NSLog(@"device is = %@",deviceModel);
    }
    -(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
        if ([deviceModel isEqualToString:@"iPhone Simulator"]) {
            return 1;
        }else
        {
            return 2;
        }
    }
    -(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
          return 3;

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

        // Setup cell identifier
        static NSString *cellIdentifier = @"cvCell";

        /* Uncomment this block to use subclass-based cells */
        CVCell *cell = (CVCell *)[collectionView dequeueReusableCellWithReuseIdentifier:cellIdentifier forIndexPath:indexPath];


        if (indexPath.section == 0) {
            cell.backgroundColor = [UIColor redColor];
        }
        if (indexPath.section == 1) {
            cell.backgroundColor = [UIColor blueColor];
        }
        cell.titleLabel.text = [NSString stringWithFormat:@"item %ld",(long)indexPath.section];
        // Return the cell
        return cell;

    }

检查此代码，它将在 iPhone 单元中为您提供一项，在 iPad 中为您提供两项..