Summary:
Adding a working range example to the example app. This example:
- Displays a list of images downloaded from unsplash.it
- Create 20 uniquely-random sized objects
- When section controllers enter the range, create a data task to download the image
- When finished, store image in `downloadedImage`
- Set in cell if cell is visible
- Don't create task if already downloaded or task created
- Cancel task when section controller is destroyed
- Show a spinner cell while downloading the image
Fixes#84
- [x] All tests pass. Demo project builds and runs.
- [x] I have reviewed the [contributing guide](https://github.com/Instagram/IGListKit/blob/master/CONTRIBUTING.md)
Closes https://github.com/Instagram/IGListKit/pull/89
Differential Revision: D4050210
Pulled By: rnystrom
fbshipit-source-id: 628a777fa819dccd9d9f4f58646cdf72fb4bc65c
Summary:
The scroll delegate got lost in migrating scroll events to their own delegates and broke the sample app. It looks like there's an actual UIKit bug in iOS 10 though. Fixes#87
- [x] All tests pass. Demo project builds and runs.
- [x] I have reviewed the [contributing guide](https://github.com/Instagram/IGListKit/blob/master/CONTRIBUTING.md)
Closes https://github.com/Instagram/IGListKit/pull/88
Differential Revision: D4050213
Pulled By: rnystrom
fbshipit-source-id: 61b29489f28002ad61193df237889b0bb8d34a29
