https://github.com/mosheberman/scrollviewsnapshotter

A demo project showing how to correctly snapshot the contents UIScrollView and its subclasses.
https://github.com/mosheberman/scrollviewsnapshotter

Last synced: 11 months ago
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A demo project showing how to correctly snapshot the contents UIScrollView and its subclasses.

• Host: GitHub
• URL: https://github.com/mosheberman/scrollviewsnapshotter
• Owner: MosheBerman
• License: mit
• Created: 2016-04-11T00:35:41.000Z (about 10 years ago)
• Default Branch: master
• Last Pushed: 2016-04-12T16:21:03.000Z (about 10 years ago)
• Last Synced: 2025-04-10T00:15:46.522Z (about 1 year ago)
• Language: Swift
• Size: 26.4 KB
• Stars: 18
• Watchers: 2
• Forks: 3
• Open Issues: 3
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# ScrollViewSnapshotter

A demo project showing how to correctly snapshot the contents UIScrollView and its subclasses.

About:

---

Historically, the suggested approach to snapshotting a scrollview was to resize the scroll view's  `frame` to match its `contentSize`. This became inconvenient with the introduction of autolayout on iOS.

This example scrolls through the contents of a scrollview subclass (in this case a collection view) and generates a PDF. 

The magic comes from translating the core graphics current transformation matrix along with the `contentOffset`. Check out the ScrollViewSnapshotter class for implementation details and a ton of notes. Those notes are also available on [my blog](http://blog.mosheberman.com/generating-a-pdf-from-a-uiscrollview/).

License:

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MIT