Databases
StackOverflow2013
Postsdbo
POUICollectionView Header Compatible Views
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POUICollectionView Header Compatible Views
    primarykey
    data
    text
    <p>I've constructed an <code>UICollectionView</code> in a storyboard and implemented all of its required data source and delegate methods in the view controller. In the storyboard, I checked the <code>Section Header</code> property on the collection view and set the header view's class to a subclass of <code>UICollectionResusableView</code> (in the storyboard).</p> <p>From here, I dragged in two UI elements onto the header view via the storyboard--a label and a segmented control:</p> <p><img src="https://i.stack.imgur.com/6fTAo.jpg" alt="enter image description here"></p> <p>When the program is executed, the label appears in the header view of the collection view (with no actual code required), but the segmented control does not. However, when a segmented control is dragged onto a typical <code>UIView</code>, it displays and is manipulatable with no code required. Even when instantiated through code in an <code>IBOutlet</code>, the segmented control does not appear.</p> <p>Why is the segmented control not visible on the collection view's header while it is in a typical <code>UIView</code>, and why does the label display without issue?</p> <p><strong>UPDATE</strong></p> <p>Here is the init method for the custom header view, in which I attempted adding the segmented control programmatically (as opposed to in the storyboard):</p> <pre><code>- (id)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { _segmentedControl = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:@"One", @"Two", nil]]; [_segmentedControl setFrame:CGRectMake(0, 0, 100, 50)]; [_segmentedControl addTarget:self action:@selector(segmentedControlChanged:) forControlEvents:UIControlEventValueChanged]; [self addSubview:_segmentedControl]; } return self; } </code></pre> <p>As requested, here is the <code>-[UICollectionReusableView viewForSupplementaryElementOfKind:]</code> method in the main view controller:</p> <pre><code>- (UICollectionReusableView *)collectionView:(UICollectionView *)cv viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath { GalleryHeader *headerView = [cv dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"HeaderView" forIndexPath:indexPath]; return headerView; } </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USThe Kraken
    1. USThe Kraken
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POUICollectionView Header Compatible Views
      1. USThe Kraken
      1. VTBountyStart
    2. VO
      singulars
      1. POUICollectionView Header Compatible Views
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POUICollectionView Header Compatible Views
      1. This table or related slice is empty.
      1. VTUpMod
    1. CODid you implement the `uicollectionviewdatasource` method `collectionView:viewForSupplementaryElementOfKind:atIndexPath:`?
      singulars
      1. POUICollectionView Header Compatible Views
      1. USmicantox
    2. COYes I did. I'll post the code for that too.
      singulars
      1. POUICollectionView Header Compatible Views
      1. USThe Kraken
    3. COOk, ill wait for the edit then
      singulars
      1. POUICollectionView Header Compatible Views
      1. USmicantox
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload