Quick Look Previews from the Ground Up

WWDC 2018

Supported file types

• (new) USDZ (AR format)
• Images, Videos, Audio files, PDF documents
• HTML documents, Rich Text Format (RTF) documents
• Text files that conform to public.text
• iWork and Office documents
• ZIP archives
• File formats covered by 3rd Party Quick Look preview extensions

When to use Quick Look

• Zoom into photos
• Flick through a collection of photos
• Play back an audio file or video
• Present a document PDF

When not to use Quick Look

Presenting Quick Look

Presenting Quick Look

Modal

Push

Controlling Quick Look

Creating a Preview Extension

Step 1 — Creation using Xcode template

Step 2 — Editing the Info.plist

Step 3 — QLPreviewingController protocol

Thumbnail Extension

Creating a Thumbnail Extension

Step 1 — Creation using Xcode template

Step 2 — Editing the Info.plist

Step 3 — Implementing your QLThumbnailProvider subclass

• Using CoreGraphics, UIKit

Demo