Intermediate iOS 10 Programming with Swift by Simon Ng

Author:Simon Ng
Language: eng
Format: epub, pdf
Publisher: GitBook

Quick note: If you run the app on iPhone 6/6 Plus simulator, the result will be slightly difference. I will explain it in the later chapter.

Customizing the Collection Cell Background

Cool, right? With a few lines of code, you can create a grid-based photo app. What if you want to add a picture frame to the photos? Like other UI elements, UICollectionViewCell lets developers easily customize its background.

A collection view cell is comprised of three different views including background, selected background and content view: 

Background View – background view of the cell

Selected Background View – the background view when the cell is selected. When the user selects the cell, this selected background view will be layered above the background view.

Content View – obviously, it's the cell content.

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