iPad 故事板上的 Segue 标识符答案

【问题标题】：Segue Identifier on iPad StoryboardiPad 故事板上的 Segue 标识符
【发布时间】：2014-01-23 19:52:51
【问题描述】：

我有一个应用程序设置了收藏视图，其中一个具有一系列单元格，然后与另一个具有全屏单元格的单元格连接以重新创建照片库。我在 iPhone 上可以正常工作，但是当我尝试在 iPad 上单击第一个单元格时，应该可以识别索引路径中的项目并将其传递给全屏视图，但这种情况没有发生。

我相信我正在寻找一个 segue 标识符的原因，因为这是一个通用应用程序，所以我对两种用途都使用相同的代码。在 iPhone 故事板上，我可以设置 segue 标识符，但这不会出现在 iPad 故事板上。问题是…。这是正常的吗？有办法解决吗？我可以根据要求提供代码，但目前认为它与问题无关。

代码是：

第一个集合视图

@implementation Study3CollectionViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}


- (void)viewDidLoad {
    [super viewDidLoad];
    [self createData];
}

- (void)createData {

    self.dresserImages = [NSMutableArray array];

    [self.dresserImages addObject:[[NSMutableDictionary alloc]
                                   initWithObjectsAndKeys:@"Newton Wardrobes", @"name",
                                   @"IMG_4723.JPG", @"image", nil]];
    [self.dresserImages addObject:[[NSMutableDictionary alloc]
                                   initWithObjectsAndKeys:@"Newton Wardrobes", @"name",
                                   @"IMG_4726.JPG", @"image", nil]];
    [self.dresserImages addObject:[[NSMutableDictionary alloc]
                                   initWithObjectsAndKeys:@"Newton Wardrobes", @"name",
                                   @"IMG_4729.JPG", @"image", nil]];
    [self.dresserImages addObject:[[NSMutableDictionary alloc]
                                   initWithObjectsAndKeys:@"Newton Wardrobes", @"name",
                                   @"IMG_4730.JPG", @"image", nil]];
    [self.dresserImages addObject:[[NSMutableDictionary alloc]
                                   initWithObjectsAndKeys:@"Newton Wardrobes", @"name",
                                   @"IMG_4731.JPG", @"image", nil]];


    [self.collectionView reloadData];

}

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


- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *identifier = @"Cell";

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

    UIImageView *dresserImageView = (UIImageView *)[cell viewWithTag:100];
    dresserImageView.image = [UIImage imageNamed:[[self.dresserImages objectAtIndex:indexPath.row] objectForKey:@"image"]];

    return cell;
}

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
    if (_startingIndexPath) {
        NSInteger currentIndex = floor((scrollView.contentOffset.x - scrollView.bounds.size.width / 1) / scrollView.bounds.size.width) + 1;
        if (currentIndex < [self.dresserImages count]) {
            self.title = self.dresserImages[currentIndex][@"name"];
        }
    }
}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if ([segue.identifier isEqualToString:@"collectionView"])

    {
        Study3DetailCollectionViewController *destViewController = (Study3DetailCollectionViewController *)segue.destinationViewController;

        NSIndexPath *indexPath = [[self.collectionView indexPathsForSelectedItems] objectAtIndex:0];

        destViewController.startingIndexPath = indexPath;

        [destViewController.collectionView scrollToItemAtIndexPath:indexPath atScrollPosition:UICollectionViewScrollPositionCenteredHorizontally animated:NO];

        [self.collectionView deselectItemAtIndexPath:indexPath animated:NO];
    }
}

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];

    [self.collectionView scrollToItemAtIndexPath:self.startingIndexPath atScrollPosition:UICollectionViewScrollPositionCenteredHorizontally animated:NO];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

详细视图

@implementation Study3DetailCollectionViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}


- (void)viewDidLoad {
    [super viewDidLoad];
    [self createData];
}

- (void)createData {

    self.dresserImages = [NSMutableArray array];

    [self.dresserImages addObject:[[NSMutableDictionary alloc]
                                   initWithObjectsAndKeys:@"Newton Wardrobes", @"name",
                                   @"IMG_4723.JPG", @"image", nil]];
    [self.dresserImages addObject:[[NSMutableDictionary alloc]
                                   initWithObjectsAndKeys:@"Newton Wardrobes", @"name",
                                   @"IMG_4726.JPG", @"image", nil]];
    [self.dresserImages addObject:[[NSMutableDictionary alloc]
                                   initWithObjectsAndKeys:@"Newton Wardrobes", @"name",
                                   @"IMG_4729.JPG", @"image", nil]];
    [self.dresserImages addObject:[[NSMutableDictionary alloc]
                                   initWithObjectsAndKeys:@"Newton Wardrobes", @"name",
                                   @"IMG_4730.JPG", @"image", nil]];
    [self.dresserImages addObject:[[NSMutableDictionary alloc]
                                   initWithObjectsAndKeys:@"Newton Wardrobes", @"name",
                                   @"IMG_4731.JPG", @"image", nil]];


    [self.collectionView reloadData];

}

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


- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *identifier = @"Cell";

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

    UIImageView *dresserImageView = (UIImageView *)[cell viewWithTag:100];
    dresserImageView.image = [UIImage imageNamed:[[self.dresserImages objectAtIndex:indexPath.row] objectForKey:@"image"]];

    return cell;
}

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
    if (_startingIndexPath) {
        NSInteger currentIndex = floor((scrollView.contentOffset.x - scrollView.bounds.size.width / 1) / scrollView.bounds.size.width) + 1;
        if (currentIndex < [self.dresserImages count]) {
            self.title = self.dresserImages[currentIndex][@"name"];
        }
    }
}

- (BOOL) shouldAutorotate
{
    return YES;
}

-(NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskAll;
}

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];

    UICollectionViewFlowLayout *layout = (UICollectionViewFlowLayout *)self.collectionView.collectionViewLayout;
    layout.itemSize = self.view.bounds.size;

    [self.collectionView scrollToItemAtIndexPath:self.startingIndexPath atScrollPosition:UICollectionViewScrollPositionCenteredHorizontally animated:NO];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

【问题讨论】：

您是否在两个情节提要上设置了标识符？
是的，你应该提供代码，尤其是prepareForSegues:sender: part
如果您的应用是通用应用，则必须单独为 iPad 故事板设置 segue 标识符
我的意思是它没有出现是我没有选择输入它的选项，您通常输入的选项卡只是说不适用，因为它在 iPhone 选项卡上，并且我可以输入。 iPhone 工作得很好。
你能显示标签的截图吗？ :)

标签： ios ipad storyboard uistoryboardsegue

【解决方案1】：

刚刚看到你说“没有出现在 iPad 故事板中”。

不自己设置就不会出现。

您需要进入 iPad 故事板文件并在其中再次设置 segue 标识符。

【讨论】：

【解决方案2】：

如果您在 iPad 上使用与 iPhone 相同的故事板，那么您可以简单地复制 iPhone 故事板的内容并将其粘贴到 iPad 故事板上。事情会放错地方，但如果使用自动布局，它将在运行时修复。或者你可以关注this

【讨论】：