Errors when trying to compile a project using Charts

[tonucha]

What did you do?

I have two Swift Projects with Charts in them.
Project 1 contains views added to the demo project, cloned from Github. This works fine with hardcoded data on a barchart showing 'Expected' and 'Actual' levels of activity.
Project 2 is my 'real' project. It uses a number of AWS functions, retrieves data from the cloud, etc and I need to replicate the bar chart with the two datasets. This already had a pod file.

• I added " pod 'Charts' " to the podfile (excluding the " ")
• I ran "pod install" at the terminal --- all fine
• I opened my xcworkspace and added a view to one of the View Controllers. I selected BarChartView in the Class, and saw 'Charts' in the Module (all looking good!)
  -I created a new file and entered "import Charts" - Error: No such Module.
• I commented it out and tried to compile.

What did you expect to happen?

I expected the project to compile (!) -- for once the problem was not caused by me (that's a first!)

What happened instead?

I got 5 errors in the file ChartUtils.swift
Ambiguous Operator +
Use of undeclared type NSAttributedStringKey (in 4 different places)
I then opened the corresponding file in my 'working test project' and realised that the two files are different.

Charts Environment

Charts version/Branch/Commit Number:
3.0
Xcode version:
8.2.1
Swift version:
10.9
Platform(s) running Charts:

macOS version running Xcode:
OSX El Capitan 10.11.6

Demo Project

GN_IOS_Light copy.zip

[tonucha]

ps... the number of compilation errors goes up and down.
-Cannot use instance member '_viewPortHandler' within property initializer...'
-count is unavailable: there is no universally good answer...'

[thierryH91200]

please read "readme"

Xcode 9.3 / Swift 4.1
iOS >= 8.0 (Use as an Embedded Framework)
tvOS >= 9.0
macOS >= 10.11