我正在使用以下命令从命令行构建/运行iOS应用：
xcodebuild -sdk "${TARGET_SDK}" -xcconfig "${CONFIG_FILE_PATH}" -configuration Release
/usr/bin/xcrun -sdk "${TARGET_SDK}" PackageApplication -v "${PROJECT_BUILD_DIR}/${APPLICATION_NAME}.app" -o "${OUTPUT_DIR}/${APPLICATION_NAME}.ipa"
有没有清理目标的命令，或者这些命令会自动清理。
来自 xcodebuild 手册页面：
xcodebuild [-project projectname] [-target targetname ...] [-configuration configurationname] [-sdk [sdkfullpath | sdkname]] [buildaction ...] [setting=value ...] [-userdefault=value ...]
构建操作可以采用以下值（UPD 13.08.2018）：
action ...
Specify one or more actions to perform. Available actions are:
build Build the target in the build root (SYMROOT). This is the default action, and
is used if no action is given.
build-for-testing Build the target and associated tests in the build root (SYMROOT). This will
also produce an xctestrun file in the build root. This requires specifying a
scheme.
analyze Build and analyze a target or scheme from the build root (SYMROOT). This
requires specifying a scheme.
archive Archive a scheme from the build root (SYMROOT). This requires specifying a
scheme.
test Test a scheme from the build root (SYMROOT). This requires specifying a
scheme and optionally a destination.
test-without-building Test compiled bundles. If a scheme is provided with -scheme then the command
finds bundles in the build root (SRCROOT). If an xctestrun file is provided
with -xctestrun then the command finds bundles at paths specified in the
xctestrun file.
install-src Copy the source of the project to the source root (SRCROOT).
install Build the target and install it into the target's installation directory in
the distribution root (DSTROOT).
clean Remove build products and intermediate files from the build root (SYMROOT).
根据你的情况
xcodebuild -sdk "${TARGET_SDK}" -xcconfig "${CONFIG_FILE_PATH}" -configuration Release clean build
这个命令行中有两个构建操作: 'clean'和'build'。首先执行'clean'操作，然后执行'build'操作。如文档所述，您可以在一个命令中指定多个构建操作，这样做而不是使用单独的命令确保所有构建操作的其他选项都相同。
你可以直接删除 build 文件夹：
rm -rf ./build