Thank you for providing this tutorial. I am learning swift.
Using the Xcode project downloaded from raywenderlich.com I observe two problems which I think others should be aware of. I will be happy to provide more information if it is needed. You may already be aware of these problems.
The game does not run properly on the SE simulator, but it does run OK on an actual device.
What happens with the simulator is the score does not update properly. The score only updates when another UIevent occurs.
When running the game on both the simulator and and actual device; when the about screen is closed (after about 30 seconds) the debug console displays the errors shown below:
2019-03-01 14:17:31.344311-0500 BullsEye[894:162397] Could not signal service com.apple.WebKit.WebContent: 113: Could not find specified service
2019-03-01 14:17:31.347918-0500 BullsEye[894:162397] Could not signal service com.apple.WebKit.Networking: 113: Could not find specified service
Below is information about the Xcode environment on my Mac.
Version: 10.1 (10B61)
Xcode: 10.1 (14460.46)
Instruments: 10.1 (64460.27)
Here is information about the Mac OS that I am using:
System Software Overview:
System Version: macOS 10.13.6 (17G5019)
Kernel Version: Darwin 17.7.0