Lately, I find myself often dealing with a lot of Xcode build phases. One common problem that I encounter is that SwiftUI previews won’t work if some build phase runs a script which messes with Xcode project file or with individual files. For example, script which sorts files alphabetically may modify Xcode project file which will prevent previews to work. To work around this problem, you can check if Xcode is building for previews and then decide whether to run the script or not.

if [ ${ENABLE_PREVIEWS} == NO ];
then
echo "Running sorting script"
fi

I have spent some time playing with Apple’s Multi Peer connectivity framework on iOS. It is incredible what kind of apps it enables. Here is my unfinished sample app that allows for voice calls in cases where there is no internet access or even infrastructure Wi-Fi. I have to say that most difficult part was configuring AVAudioEngine it is extremely easy to mess things up. Audio is hard.