使用 swift4 在 xcode 中对单个项目使用不同的 GoogleService-Info.plist

我有一个项目，但有 4 个不同的环境（开发、暂存、质量检查、生产）。我已经从移动设备的设置中给出了他们的（环境的网络服务 URL）路径。现在我想为所有这些不同的环境使用不同的 GoogleService-info.plist 。就像当我从后端选择 Dev 时，该项目应该仅采用 Dev 项目的 GoogleService-Info.plist 。这些 GoogleService-Info.plist 是在 4 个不同的帐户上创建的。项目应以编程方式采用 GoogleService-info.plist 的路径。我尝试过以下代码

1]通过参考this https://medium.com/@brunolemos/how-to-setup-a-different-firebase-project-for-debug-and-release-environments-157b40512164url ，我创建了两个文件夹 Dev 和 QA （目前）并尝试通过编程方式给出它们的路径

#if DEV
    print("[FIREBASE] Development mode.")
    filePath = Bundle.main.path(forResource: "GoogleService-Info", 
ofType: "plist", inDirectory: "Dev")
    #elseif QA
    print("[FIREBASE] QA mode.")
    filePath = Bundle.main.path(forResource: "GoogleService-Info", 
ofType: "plist", inDirectory: "QA")
    #endif
    let options = FirebaseOptions.init(contentsOfFile: filePath)!
    FirebaseApp.configure(options: options)

但它会抛出一个错误

Thread 1: Fatal error: Unexpectedly found nil while unwrapping an Optional value

on

 let options = FirebaseOptions.init(contentsOfFile: filePath)!

这条线

2]其次，我通过 GoogleService-Info-QA.plist 更改了 GoogleService-Info.plist 的名称，并尝试以编程方式访问该文件

private func configureFirebase() {
    guard   let plistPath = Bundle.main.path(forResource: 
"GoogleService-Info-QA", ofType: "plist"),
        let options =  FirebaseOptions(contentsOfFile: plistPath)
        else { return }
    FirebaseApp.configure(options: options)
}

但它会抛出一个错误

Terminating app due to uncaught exception 'FIRAppNotConfigured', 
reason: 'Failed to get default Firebase Database instance. Must 
call `[FIRApp configure]` (`FirebaseApp.configure()` in Swift) 
before using Firebase Database.

对于此确认，您必须执行以下步骤：

1. 转到项目设置
2. 选择您的开发目标
3. 转到构建阶段
4. 单击图标并创建名为 GOOGLESERVICE_INFO_PLIST 的新运行脚本
5. 使用以下脚本

//Name of the resource we're selectively copying
GOOGLESERVICE_INFO_PLIST=GoogleService-Info.plist

//Get references to dev and prod versions of the GoogleService-Info.plist
//NOTE: These should only live on the file system and should NOT be part of the target (since we'll be adding them to the target manually)
GOOGLESERVICE_INFO_DEV=${PROJECT_DIR}/projectFolder/Firebase/Dev/${GOOGLESERVICE_INFO_PLIST}
GOOGLESERVICE_INFO_PROD=${PROJECT_DIR}/projectFolder/Firebase/Prod/${GOOGLESERVICE_INFO_PLIST}

//Make sure the dev version of GoogleService-Info.plist exists
echo "Looking for ${GOOGLESERVICE_INFO_PLIST} in ${GOOGLESERVICE_INFO_DEV}"

if [ ! -f $GOOGLESERVICE_INFO_DEV ]
then
echo "No Development GoogleService-Info.plist found. Please ensure it's in the proper directory."
exit 1
fi

//Make sure the prod version of GoogleService-Info.plist exists
echo "Looking for ${GOOGLESERVICE_INFO_PLIST} in ${GOOGLESERVICE_INFO_PROD}"
if [ ! -f $GOOGLESERVICE_INFO_PROD ]
then
echo "No Production GoogleService-Info.plist found. Please ensure it's in the proper directory."
exit 1
fi

//Get a reference to the destination location for the GoogleService-Info.plist
PLIST_DESTINATION=${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}.app
echo "Will copy ${GOOGLESERVICE_INFO_PLIST} to final destination: ${PLIST_DESTINATION}"

//Copy over the prod GoogleService-Info.plist for Release builds
if [ "${CONFIGURATION}" == "Release" ]
then
echo "Using ${GOOGLESERVICE_INFO_PROD}"
cp "${GOOGLESERVICE_INFO_PROD}" "${PLIST_DESTINATION}"
else
echo "Using ${GOOGLESERVICE_INFO_DEV}"
cp "${GOOGLESERVICE_INFO_DEV}" "${PLIST_DESTINATION}"
fi

• 最后一步：确保您已将 GoogleService-Info.plist 放置在项目中正确的位置路径中，您可以找到附图作为参考。

GOOGLESERVICE_INFO_DEV=${PROJECT_DIR}/项目文件夹/Firebase/Dev/${GOOGLESERVICE_INFO_PLIST} GOOGLESERVICE_INFO_PROD=${PROJECT_DIR}/项目文件夹/Firebase/Prod/${GOOGLESERVICE_INFO_PLIST}

项目文件夹是你当前的项目文件夹