Compiling for iOS 11.0, but module 'PhoneNumberKit' has a minimum deployment target of iOS 12.0: /Users/wf/Library/Developer/Xcode/DerivedData/Runner-eulxxjktligrmudeatqhkbqlshne/Build/Products/Debug-iphoneos/PhoneNumberKit/PhoneNumberKit.framework/Modules/PhoneNumberKit.swiftmodule/arm64-apple-ios.swiftmodule
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解决方法:
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最后选择 iOS12,然后就可以了