Instance Property


The margins used to lay out content in a section.


@property NSEdgeInsets sectionInset;


If the delegate does not implement the collectionView:layout:insetForSectionAtIndex: method, the flow layout object uses the value of this property to set the margins for each section.

Section insets reflect the spacing at the outer edges of the section. The margins affect the positioning of the header view, the minimum space on either side of each line of items, and the distance from the last line to the footer view, as shown in Figure 1. The margin insets do not affect the size of the header and footer views in the nonscrolling direction.

Figure 1

Applying edge insets to the items in a section

The default insets are all set to 0.

See Also

Configuring the Item Spacing


The minimum spacing (in points) to use between rows or columns.


The minimum spacing (in points) to use between items in the same row or column.


The estimated size of items in the collection view.


The default size to use for items.