最近在用 Xcode 16.2 开发小组件，在 iOS17.5 模拟器小组件一切正常，但在 iOS 15.2 模拟器却怎么都找不到小组件，找遍了百度和Google都没找到解决方案，最终总算在苹果开发者社区找到了思路。
一般情况 Xcode 16+ 才会有这个问题，苹果开发者社区有苹果的工程师说正在修复中，但我现在找不到那篇帖子了...
国外有很多开发者遇到了这个问题，但不知道为什么国内好像完全找不到开发者提过这个问题
截止现在，解决方案就是将 Xcode 降级回 Xcode 15.4，其中也有些坑，下面是具体的步骤。
1. 安装 Xcode 15.4
1.1 官网下载 Xcode 15.4
地址：developer.apple.com/download/al…
下载：Xcode 15.4
1.2 在保留 Xcode 16.2 的基础上安装 Xcode 15.4
将下载的 Xcode_15.4.xip 双击解压，会得到一个 Xcode 应用，可以把这个应用放在特定目录，或直接放在 Mac 的应用程序下，并命名为 Xcode-15.4，我是直接放在应用程序里。
1.3 通过指令切换 Xcode 版本
切换到15.4：sudo xcode-select -s /Applications/Xcode-15.4.app/Contents/Developer
切换到16.2：sudo xcode-select -s /Applications/Xcode.app/Contents/Developer
查看当前 Xcode 版本：xcodebuild -version
2. 原项目（flutter）跑不起来了？
Xcode 15.4 安装好了，现在新问题来了，我的项目跑不起来了（不确定别人的项目能不能直接运行，放在我切换版本后项目跑不起来了），其实就是 ios/Runner.xcodeproj/project.pbxproj 文件配置有问题，但我没找到具体是哪里有问题。
存在两个问题：
- 执行
open ios/Runner.xcodeproj打开 Xcode 时， Xcode 闪退 - 执行
flutter run时报错
ProcessException: Process exited abnormally with exit code -6:
Command line invocation:
/Applications/Xcode-15.4.app/Contents/Developer/usr/bin/xcodebuild -list
User defaults from command line:
IDEPackageSupportUseBuiltinSCM = YES
2024-12-23 13:06:27.542 xcodebuild[70820:19190217] [MT] DVTAssertions: ASSERTION FAILURE in
DevToolsCore/Xcode3Core/LegacyProjects/Frameworks/DevToolsCore/DevToolsCore/ProjectModel/DataModel/References/SynchronizedGroups/PBXFileSystemSynchronizedAbstractGroup.m:28
Details: Assertion failed: IDEFileSystemSynchronizedGroupsAreEnabled()
Object: <PBXFileSystemSynchronizedRootGroup>
Method: +allocWithZone:
Thread: <_NSMainThread: 0x12800fa50>{number = 1, name = main}
Hints:
Backtrace:
0 -[DVTAssertionHandler handleFailureInMethod:object:fileName:lineNumber:assertionSignature:messageFormat:arguments:] (in DVTFoundation)
1 _DVTAssertionHandler (in DVTFoundation)
2 _DVTAssertionFailureHandler (in DVTFoundation)
3 _DVTAssertionWarningHandler (in DVTFoundation)
4 -[PBXFileSystemSynchronizedAbstractGroup initWithName:path:sourceTree:] (in DevToolsCore)
5 -[PBXPListUnarchiver _unarchiveObjectWithGlobalIDHexString:] (in DevToolsCore)
6 -[PBXPListUnarchiver _decodeMutableObjectArrayFromPListArray:] (in DevToolsCore)
7 -[PBXPListUnarchiver decodeMutableObjectArrayForKey:] (in DevToolsCore)
8 -[PBXUnarchivingBinding readValueForObject:fromPListUnarchiver:] (in DevToolsCore)
9 -[PBXObject _unarchiveValuesForArchiveMask:fromPListUnarchiver:] (in DevToolsCore)
10 -[PBXObject readFromPListUnarchiver:] (in DevToolsCore)
11 -[PBXReference readFromPListUnarchiver:] (in DevToolsCore)
12 -[PBXPListUnarchiver _unarchiveObjectWithGlobalIDHexString:] (in DevToolsCore)
13 -[PBXPListUnarchiver decodeObjectForKey:] (in DevToolsCore)
14 -[PBXUnarchivingBinding readValueForObject:fromPListUnarchiver:] (in DevToolsCore)
15 -[PBXObject _unarchiveValuesForArchiveMask:fromPListUnarchiver:] (in DevToolsCore)
16 -[PBXObject readFromPListUnarchiver:] (in DevToolsCore)
17 -[PBXContainer readFromPListUnarchiver:] (in DevToolsCore)
18 -[PBXProject readFromPListUnarchiver:] (in DevToolsCore)
19 -[PBXPListUnarchiver _unarchiveObjectWithGlobalIDHexString:] (in DevToolsCore)
20 -[PBXPListUnarchiver decodeRootObject] (in DevToolsCore)
21 +[PBXProject projectWithFile:errorHandler:readOnly:] (in DevToolsCore)
22 -[Xcode3Project initWithFilePath:extension:workspace:options:error:] (in DevToolsCore)
23 __82+[IDEContainer _retainedContainerAtFilePath:fileDataType:workspace:options:error:]_block_invoke_2 (in IDEFoundation)
24 _dispatch_client_callout (in libdispatch.dylib)
25 _dispatch_lane_barrier_sync_invoke_and_complete (in libdispatch.dylib)
26 DVTDispatchBarrierSync (in DVTFoundation)
27 -[DVTDispatchLock performLockedBlock:] (in DVTFoundation)
28 __82+[IDEContainer _retainedContainerAtFilePath:fileDataType:workspace:options:error:]_block_invoke (in IDEFoundation)
29 __58-[DVTModelObjectGraph performBlockCoalescingModelChanges:]_block_invoke (in DVTFoundation)
30 -[DVTModelGraphTransactionScope performTransaction:] (in DVTFoundation)
31 -[DVTModelObjectGraph performBlockCoalescingModelChanges:] (in DVTFoundation)
32 +[IDEContainer _retainedContainerAtFilePath:fileDataType:workspace:options:error:] (in IDEFoundation)
33 -[IDEWorkspace _configureWrappedWorkspaceWithError:] (in IDEFoundation)
34 __82+[IDEContainer _retainedContainerAtFilePath:fileDataType:workspace:options:error:]_block_invoke (in IDEFoundation)
35 +[IDEContainer _retainedContainerAtFilePath:fileDataType:workspace:options:error:] (in IDEFoundation)
36 +[IDEContainer retainedWrappedWorkspaceForContainerAtFilePath:fileDataType:error:] (in IDEFoundation)
37 -[Xcode3CommandLineBuildTool _resolveInputOptionsWithTimingSection:] (in Xcode3Core)
38 -[Xcode3CommandLineBuildTool run] (in Xcode3Core)
39 XcodeBuildMain (in libxcodebuildLoader.dylib)
40 -[XcodebuildPreIDEHandler loadXcode3ProjectSupportAndRunXcode3CommandLineBuildToolWithArguments:] (in xcodebuild)
41 -[XcodebuildPreIDEHandler runWithArguments:] (in xcodebuild)
42 main (in xcodebuild)
43 start (in dyld)
Command: /usr/bin/arch -arm64e xcrun xcodebuild -list
2.1 判断 Xcode 15.4 是否安装正确
方法一：
flutter create test 新建一个新的 flutter 项目，看看能不能正常运行，并且能够通过 Xcode 打开，如果可以，则可以继续下一步
方法二：
直接用 Xcode 15.4 创建一个空白项目，如果能正常运行，则说明安装正确
2.2 解决方案
- 备份项目根目录下的
ios目录 - 删除项目根目录下的
ios目录 - 重新生成
ios目录，执行flutter create . - 重新生成
ios目录后会重新生成bundle identifier，建议全局新生成的 bundle identifier，替换成以前的，不然运行项目会报错 - 尝试运行
flutter run，第一次运行时可能会报错，没关系，再运行一次就行了
Error (Xcode): Building for 'iOS-simulator', but linking in object file (/Applications/xxxx/ios/Pods/ZXSDK/ZXSDK.framework/ZXSDK[arm64][3](ZXSDKTcpSessionManager.o)) built for 'iOS'
Error (Xcode): Linker command failed with exit code 1 (use -v to see invocation)
Could not build the application for the simulator.
Error launching application on iPhone 13 Pro.
- 正常情况下就能成功运行 flutter 项目了，如果能正常运行了，则可以恢复iOS的配置了（注意：这个时候别恢复 project.pbxproj 和小组件代码！！）
- 项目正常运行后再添加空白小组件，小组件名称和配置按照以前的来配置（命名、app group 等）
一般情况会报错：
Error (Xcode): Cycle inside Runner; building could produce unreliable results.
Cycle details:
→ That command depends on command in Target 'Runner': script phase “[CP] Embed Pods Frameworks”
○ Target 'Runner'
○ That command depends on command in Target 'Runner': script phase “Thin Binary”
○ Target 'Runner' has process command with output '/Applications/xxx/build/ios/Debug-iphonesimulator/Runner.app/Info.plist'
○ Target 'Runner' has copy command from '/Applications/xxx/build/ios/Debug-iphonesimulator/GoldStatisticsWidgetExtension.appex' to
'/Applications/xxx/build/ios/Debug-iphonesimulator/Runner.app/PlugIns/GoldStatisticsWidgetExtension.appex'
○ That command depends on command in Target 'Runner': script phase “[CP] Copy Pods Resources”
○ Target 'Runner'
Raw dependency cycle trace:
target: ->
node: <all> ->
command: <all> ->
node: /Applications/xxx/build/ios/Debug-iphonesimulator/Runner.app/_CodeSignature ->
command: P0:target-Runner-18c1723432283e0cc55f10a6dcfd9e0288a783a885d8b0b3beb2e9f90bde3f49-:Debug:CodeSign
/Applications/xxx/build/ios/Debug-iphonesimulator/Runner.app ->
node: /Applications/xxx/build/ios/Debug-iphonesimulator/Runner.app/Frameworks/MTBBarcodeScanner.framework/ ->
directoryTreeSignature: } ->
directoryContents: /Applications/xxx/build/ios/Debug-iphonesimulator/Runner.app/Frameworks/MTBBarcodeScanner.framework ->
CYCLE POINT ->
node: /Applications/xxx/build/ios/Debug-iphonesimulator/Runner.app/Frameworks/MTBBarcodeScanner.framework ->
command: P2:target-Runner-18c1723432283e0cc55f10a6dcfd9e0288a783a885d8b0b3beb2e9f90bde3f49-:Debug:PhaseScriptExecution [CP] Embed Pods Frameworks
/Users/huasonglin/Library/Developer/Xcode/DerivedData/Runner-boutaagkxdqvsudyjujbixiwquit/Build/Intermediates.noindex/Runner.build/Debug-iphonesimulator/Runner.buil
d/Script-8A940D512DFEAEA305376EAA.sh ->
node:
/Users/huasonglin/Library/Developer/Xcode/DerivedData/Runner-boutaagkxdqvsudyjujbixiwquit/Build/Intermediates.noindex/Runner.build/Debug-iphonesimulator/Runner.buil
d/InputFileList-8A940D512DFEAEA305376EAA-Pods-Runner-frameworks-Debug-input-files-0e33b0ae31be6888f6074c90212e344b-resolved.xcfilelist ->
command: P2:target-Runner-18c1723432283e0cc55f10a6dcfd9e0288a783a885d8b0b3beb2e9f90bde3f49-:Debug:WriteAuxiliaryFile
/Users/huasonglin/Library/Developer/Xcode/DerivedData/Runner-boutaagkxdqvsudyjujbixiwquit/Build/Intermediates.noindex/Runner.build/Debug-iphonesimulator/Runner.buil
d/InputFileList-8A940D512DFEAEA305376EAA-Pods-Runner-frameworks-Debug-input-files-0e33b0ae31be6888f6074c90212e344b-resolved.xcfilelist ->
node: <target-Runner-18c1723432283e0cc55f10a6dcfd9e0288a783a885d8b0b3beb2e9f90bde3f49--fused-phase4-thin-binary> ->
command: P0:::Gate target-Runner-18c1723432283e0cc55f10a6dcfd9e0288a783a885d8b0b3beb2e9f90bde3f49--fused-phase4-thin-binary ->
node:
<execute-shell-script-18c1723432283e0cc55f10a6dcfd9e02f1eee2015e8ff5ebcd27678f788c2826-target-Runner-18c1723432283e0cc55f10a6dcfd9e0288a783a885d8b0b3beb2e9f90bde3f4
9-> ->
command: P2:target-Runner-18c1723432283e0cc55f10a6dcfd9e0288a783a885d8b0b3beb2e9f90bde3f49-:Debug:PhaseScriptExecution Thin Binary
/Users/huasonglin/Library/Developer/Xcode/DerivedData/Runner-boutaagkxdqvsudyjujbixiwquit/Build/Intermediates.noindex/Runner.build/Debug-iphonesimulator/Runner.buil
d/Script-3B06AD1E1E4923F5004D2608.sh ->
node: /Applications/xxx/build/ios/Debug-iphonesimulator/Runner.app/Info.plist/ ->
directoryTreeSignature: a ->
directoryContents: /Applications/xxx/build/ios/Debug-iphonesimulator/Runner.app/Info.plist ->
node: /Applications/xxx/build/ios/Debug-iphonesimulator/Runner.app/Info.plist ->
command: P0:target-Runner-18c1723432283e0cc55f10a6dcfd9e0288a783a885d8b0b3beb2e9f90bde3f49-:Debug:ProcessInfoPlistFile
/Applications/xxx/build/ios/Debug-iphonesimulator/Runner.app/Info.plist /Applications/xxx/ios/Runner/Info.plist
->
node: /Applications/xxx/build/ios/Debug-iphonesimulator/Runner.app/PlugIns/GoldStatisticsWidgetExtension.appex ->
command: P0:target-Runner-18c1723432283e0cc55f10a6dcfd9e0288a783a885d8b0b3beb2e9f90bde3f49-:Debug:Copy
/Applications/xxx/build/ios/Debug-iphonesimulator/Runner.app/PlugIns/GoldStatisticsWidgetExtension.appex
/Applications/xxx/build/ios/Debug-iphonesimulator/GoldStatisticsWidgetExtension.appex ->
node: <target-Runner-18c1723432283e0cc55f10a6dcfd9e0288a783a885d8b0b3beb2e9f90bde3f49--fused-phase6--cp--copy-pods-resources> ->
command: P0:::Gate target-Runner-18c1723432283e0cc55f10a6dcfd9e0288a783a885d8b0b3beb2e9f90bde3f49--fused-phase6--cp--copy-pods-resources ->
node: /Applications/xxx/build/ios/Debug-iphonesimulator/Runner.app/fluwx_privacy.bundle ->
command: P2:target-Runner-18c1723432283e0cc55f10a6dcfd9e0288a783a885d8b0b3beb2e9f90bde3f49-:Debug:PhaseScriptExecution [CP] Copy Pods Resources
/Users/huasonglin/Library/Developer/Xcode/DerivedData/Runner-boutaagkxdqvsudyjujbixiwquit/Build/Intermediates.noindex/Runner.build/Debug-iphonesimulator/Runner.buil
d/Script-E81C299A0BC0FF032C1949E3.sh ->
node:
/Users/huasonglin/Library/Developer/Xcode/DerivedData/Runner-boutaagkxdqvsudyjujbixiwquit/Build/Intermediates.noindex/Runner.build/Debug-iphonesimulator/Runner.buil
d/InputFileList-E81C299A0BC0FF032C1949E3-Pods-Runner-resources-Debug-input-files-79a01d4b271c4fb1457562b9258ddb89-resolved.xcfilelist ->
command: P2:target-Runner-18c1723432283e0cc55f10a6dcfd9e0288a783a885d8b0b3beb2e9f90bde3f49-:Debug:WriteAuxiliaryFile
/Users/huasonglin/Library/Developer/Xcode/DerivedData/Runner-boutaagkxdqvsudyjujbixiwquit/Build/Intermediates.noindex/Runner.build/Debug-iphonesimulator/Runner.buil
d/InputFileList-E81C299A0BC0FF032C1949E3-Pods-Runner-resources-Debug-input-files-79a01d4b271c4fb1457562b9258ddb89-resolved.xcfilelist ->
node: <target-Runner-18c1723432283e0cc55f10a6dcfd9e0288a783a885d8b0b3beb2e9f90bde3f49--fused-phase5--cp--embed-pods-frameworks> ->
command: P0:::Gate target-Runner-18c1723432283e0cc55f10a6dcfd9e0288a783a885d8b0b3beb2e9f90bde3f49--fused-phase5--cp--embed-pods-frameworks ->
node: /Applications/xxx/build/ios/Debug-iphonesimulator/Runner.app/Frameworks/MTBBarcodeScanner.framework
Could not build the application for the simulator.
Error launching application on iPhone 13 Pro.
在 Xcode 中配置一下 Runner 的 Build Phases，将 Embed Foundation Extensions 移动到 Run Script 前面即可：
正常情况执行 flutter run 就能运行项目，并且能够在 iOS 14、15 找到小组件了，然后再把原项目的小组件代码恢复即可。
3. 其他问题
3.1 运行没报错，但在模拟器找不到小组件
检查一下 Runner -> Targets -> 小组件 的 Minimum Deployments 和 Build Settings 里面的 iOS Deployment Target iOS 版本是不是设置太高了，如果设置太高了，则低于改版本的iOS系统会找不到小组件。
