UICollectionView

Question 1

In UICollectionView:

Methods called always during layout process?

Answer 1

• prepareLayout
• collectionViewContentSize
• layoutAttributesForElementsInRect:

Question 2

In UICollectionView:

What is a Supplementary View?

Answer 2

Any view that isn’t a cell and display data. Their contents are driven by the data source object.

Question 3

In UICollectionView:
What class is responsible for displaying one unit of content to a user at a time?

Answer 3

UICollectionViewCell

Question 4

In UICollectionView:
What class determines the attributes of items and returns that information to the collection view

Answer 4

UICollectionViewLayout

Question 5

In UICollectionView:
What class encapsulates all layout-related properties of an item in the collection view?

Answer 5

UICollectionViewLayoutAttributes

Question 6

In UICollectionView:

What is the method from UICollectionViewLayout that returns the attributes of elements in rect?

Answer 6

layoutAttributesForElementsInRect:

Question 7

In UICollectionView:

What is the method from UICollectionViewLayout that returns the attributes of an element at given indexPath?

Answer 7

layoutAttributesForItemAtIndexPath:

Question 8

In UICollectionView:

What is a Decoration View?

Answer 8

It act as pure ornamentation. They are owned and managed entirely by the layout object and do not get their contents from the data source.

Question 9

In UICollectionView:

Method used to register a cell into an UICollectionView?

Answer 9

registerNib( , forSypplementaryViewOfKind:, withReuseIdrntifier: )