我在1.10.1版上使用cordova-plugin-facebook4。当我运行“离子科尔多瓦仿真ios”时，出现此错误：
Undefined symbols for architecture x86_64:
"___isOSVersionAtLeast", referenced from:
-[FBSDKApplicationDelegate application:openURL:sourceApplication:annotation:] in FBSDKCoreKit(FBSDKApplicationDelegate.o)
-[FBSDKApplicationDelegate applicationDidBecomeActive:] in FBSDKCoreKit(FBSDKApplicationDelegate.o)
-[FBSDKApplicationDelegate openURLWithSafariViewController:sender:fromViewController:handler:] in FBSDKCoreKit(FBSDKApplicationDelegate.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
当我删除cordoba-plugin-facebook4时，命令“离子科尔多瓦模拟iOS”起作用。我使用Xcode 8是因为我的Mac OS是10.11.6，并且我的机器太旧了，无法升级Mac OS。我将把执行环境放在下面：
Ionic:
ionic (Ionic CLI) : 4.2.1
Ionic Framework : ionic-angular 3.2.1
@ionic/app-scripts : 1.3.7
Cordova:
cordova (Cordova CLI) : 8.1.2 (cordova-lib@8.1.1)
Cordova Platforms : ios 4.4.0
Cordova Plugins : no whitelisted plugins (13 plugins total)
System:
ios-deploy : 1.9.4
NodeJS : v6.14.4
npm : 3.10.10
OS : OS X El Capitan
Xcode : Xcode 8.0 Build version 8A218a
iOS SDKs:
iOS 10.0 -sdk iphoneos10.0
iOS Simulator SDKs:
Simulator - iOS 10.0 -sdk iphonesimulator10.0
macOS SDKs:
macOS 10.12 -sdk macosx10.12
tvOS SDKs:
tvOS 10.0 -sdk appletvos10.0
tvOS Simulator SDKs:
Simulator - tvOS 10.0 -sdk appletvsimulator10.0
watchOS SDKs:
watchOS 3.0 -sdk watchos3.0
watchOS Simulator SDKs:
Simulator - watchOS 3.0 -sdk watchsimulator3.0
感谢任何帮助人员！