Ios Nativescript xcode 11.6生成失败'；未找到框架'；

我试图将xcode更新到版本12，但后来意识到我需要NS 7来使用xcode 12构建我的应用程序。然后我再次卸载了xcode 12，重新安装了xcode 11.6，并将我的package.json、package-lock.json和webpack.config恢复到以前的版本。但是，当我再次尝试为iOS构建时（使用tns run iOS），我遇到了以下错误：

ld: warning: directory not found for option '-F/Users/eaglebe/Desktop/Develop/EagleBe/Eagle.Mobile/platforms/ios/build/Debug-iphonesimulator/BEMCheckBox'
ld: warning: directory not found for option '-F/Users/eaglebe/Desktop/Develop/EagleBe/Eagle.Mobile/platforms/ios/build/Debug-iphonesimulator/DBCameraButton'
ld: warning: directory not found for option '-F/Users/eaglebe/Desktop/Develop/EagleBe/Eagle.Mobile/platforms/ios/build/Debug-iphonesimulator/DKCarouselView'
ld: warning: directory not found for option '-F/Users/eaglebe/Desktop/Develop/EagleBe/Eagle.Mobile/platforms/ios/build/Debug-iphonesimulator/IQMediaPickerController'
ld: warning: directory not found for option '-F/Users/eaglebe/Desktop/Develop/EagleBe/Eagle.Mobile/platforms/ios/build/Debug-iphonesimulator/MDFInternationalization'
ld: warning: directory not found for option '-F/Users/eaglebe/Desktop/Develop/EagleBe/Eagle.Mobile/platforms/ios/build/Debug-iphonesimulator/MNFloatingActionButton'
ld: warning: directory not found for option '-F/Users/eaglebe/Desktop/Develop/EagleBe/Eagle.Mobile/platforms/ios/build/Debug-iphonesimulator/MaterialComponents'
ld: warning: directory not found for option '-F/Users/eaglebe/Desktop/Develop/EagleBe/Eagle.Mobile/platforms/ios/build/Debug-iphonesimulator/QBImagePickerController'
ld: warning: directory not found for option '-F/Users/eaglebe/Desktop/Develop/EagleBe/Eagle.Mobile/platforms/ios/build/Debug-iphonesimulator/SCSiriWaveformView'
ld: warning: directory not found for option '-F/Users/eaglebe/Desktop/Develop/EagleBe/Eagle.Mobile/platforms/ios/build/Debug-iphonesimulator/Toast-Swift'
ld: framework not found BEMCheckBox
clang: error: linker command failed with exit code 1 (use -v to see invocation)
error: the following command failed with exit code 1 but produced no further output
Ld /Users/eaglebe/Library/Developer/Xcode/DerivedData/EagleMobile-dlaonoymliziqscnnntolzcsxnom/Build/Intermediates.noindex/EagleMobile.build/Debug-iphonesimulator/EagleMobile.build/Objects-normal/x86_64/Binary/EagleMobile normal x86_64
note: Using new build system
note: Building targets in parallel
note: Planning build
note: Constructing build description
** BUILD FAILED **

Unable to apply changes on device: 7384FF43-9F0F-4724-B430-375B5C993F43. Error is: Command xcodebuild failed with exit code 65.

我试过很多东西。使用nativescript中的高级安装文档时，命令

sudo gem install cocoapods

失败，表示未安装de命令行工具。但是，当我转到xcode>preferences>location时，我看到安装并选择了正确的命令行工具。然后我尝试使用

xcode-select--switch/

，然后

sudo-gem-install-cocoapods

工作，但是xcode构建仍然失败，并出现相同的错误。似乎是更新到xcode 12，然后重新安装xcode 11.6导致了这个问题

有人有这方面的经验吗？或者执行iOS云构建的最简单方法是什么（因为NS Sidekick不再提供它）