Loop over input files in a script in Build Phases

Navigate to Target -> Build Phases on the top left is a plus sign to add a new Build Phase “New Run Script Phase”.

Here you can enter the custom script to run. If you want to access the input or output files you can define use:

• ${SCRIPT_INPUT_FILE_0}
• ${SCRIPT_INPUT_FILE_1}
• ${SCRIPT_INPUT_FILE_n}
• ${SCRIPT_INPUT_FILE_COUNT}
• ${SCRIPT_OUTPUT_FILE_0}
• ${SCRIPT_OUTPUT_FILE_1}
• ${SCRIPT_OUTPUT_FILE_n}
• ${SCRIPT_OUTPUT_FILE_COUNT}

So to iterate over all input file i used:

COUNTER=0
while [$COUNTER -lt ${SCRIPT_INPUT_FILE_COUNT}]; do
    tmp="SCRIPT_INPUT_FILE_$COUNTER"
    FILE=${!tmp}

    echo $FILE

    let COUNTER=COUNTER+1
done

same goes for output files.