NSBluetoothAlwaysUsageDescription required, but bluetooth is not used

Question

In my ios app with new Xcode 11 GM Seed 2 after deploy, apple returned error: ITMS-90683: Missing Purpose String in Info.plist with NSBluetoothAlwaysUsageDe

Answer 1

I was able to snuff out CoreBluetooth usages by scanning for symbol usages, specifically looking for CBCentralManager. The script I wrote to do so:

#!/usr/bin/env bash
#
# find-bluetooth-usages.sh   ...

check_references_corebluetooth() {
  nm "$1" | grep "CBCentralManager" 2>&1 >/dev/null
}

find_usages () {
  app_path=$1
  if [[ ! -d $app_path || ! -d "$app_path/Frameworks" ]]; then
    echo "$app_path is not a valid app directory."
    exit 1
  fi
  app_filename=$(basename -- "$app_path")
  app_name="${app_filename%.*}"

  if check_references_corebluetooth "$app_path/$app_name"; then
    echo "$app_name contains references to CoreBluetooth"
  fi
  for framework_filename in $(ls "$app_path/Frameworks" | egrep '\.framework$'); do
    framework_path="$app_path/Frameworks/$framework_filename"
    framework_name=$(basename "$framework_path" .framework)
    if check_references_corebluetooth "$framework_path/$framework_name"; then
      echo "$framework_name contains references to CoreBluetooth"
    fi
  done
}

for arg in "$@"; do
  find_usages "$arg"
done

This will dig through the main binary + its included frameworks to find CBCentralManager references. Ex:

./find-bluetooth-usages.sh /path/to/MyApp.app