Add test app to demonstrate Changeset with collection view.

[bwhiteley]

Added an iPhone app target to explore using Changeset while updating UICollectionView.

A naive implementation is provided for comparison.

Some of the problems identified in issue #12 are demonstrated. This example app will aid in resolving those problems, and will thereafter serve as a good example for people interested in using Changeset.

[osteslag]

Thanks a lot, @bwhiteley. I will look into this shortly.

[osteslag]

Looks like you forgot to include your CollectionViewController.swift file:

<unknown>:0: error: no such file or directory: '../notables-ios/Notables/Features/FeedFilter/CollectionViewController.swift'
Command /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc failed with exit code 1

Please commit it, and I’ll continue looking into it.

And in the meantime, do you have any idea as to what the correct Changeset behaviour should be?

[bwhiteley]

How strange... I've added the missing file. Sorry about that.

At a minimum I would expect there to be a way to use the edits with UICollectionView and UITableView since both the Readme and DeLong's blog suggest it is well suited for that.

Thanks again for looking into this.

[osteslag]

The main goal for me to write Changeset is to use it with these two view classes. I have used it with table views for a while now, and haven’t encountered any problems. I’m curious to see what the problem is.

I’m also extremely busy at work at the moment (closing up on a big release), so I will have to fit it into my busy schedule.

[bwhiteley]

I added a second tab to the test app that uses a table view instead of a collection view. The table view suffers from the same problem as the collection view.

[osteslag]

You’re ahead of me, @bwhiteley. Thanks! Good to hear UITableView behaves the same at least.