xcodebuild：错误：'APP.xcworkspace'不存在

我正在尝试使用gitlab设置CI。当我尝试在本地构建时，出现以下错误： xcodebuild：错误：'APP.xcworkspace'不存在。
APP不是真实名称。我也在使用CocoaPods。

I am trying to set up CI with gitlab. When I try to build locally, I get this error : xcodebuild: error: 'APP.xcworkspace' does not exist. "APP" not being the real name. I am also using CocoaPods.

在终端中运行以下命令后，就会发生这种情况：
gitlab-ci-multi-runner exec shell build_project

This happens after I run this command in terminal: gitlab-ci-multi-runner exec shell build_project

我已经检查过，并且该文件确实存在于我称为命令的同一文件夹中。

I have checked and the file does exist in the same folder I call the command.

这是我的.gitlab-ci.yml文件：

This is my .gitlab-ci.yml file:

stages:
  - build

build_project:
  stage: build
  script:
    - xcodebuild clean -workspace APP.xcworkspace -scheme APP | xcpretty
    - xcodebuild test -workspace APP.xcworkspace -scheme APP -destination 'platform=iOS Simulator,name=iPhone 7,OS=10.2' | xcpretty -s
  tags:
    - v0.0.1

Xcode版本：8.2.1

Xcode version: 8.2.1

Cocoapods版本：1.2.0

Cocoapods version: 1.2.0

Gitlab-runner版本：1.11.0

Gitlab-runner version : 1.11.0

Alex