how to use ios simulator on expo react native code example

Example: setup android simulator for expo or react native on mac

[ -d "$HOME/Library/Android/sdk" ] && ANDROID_SDK=$HOME/Library/Android/sdk || ANDROID_SDK=$HOME/Android/Sdk
echo "export ANDROID_SDK=$ANDROID_SDK" >> ~/`[[ $SHELL == *"zsh" ]] && echo '.zshenv' || echo '.bash_profile'`