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iosswift3swift4xcode9mach-o

Swift Apple Mach-O linker error

I converted my project from swift 3 to swift 4 and am using the latest version of xcode 9. On building, I get the following error :

Undefined symbols for architecture arm64: "__T0So22AVCapturePhotoSettingsC12AVFoundation01_abC16SwiftNativeTypesACWP", referenced from: __T06SpotMi8CameraVCC12capturePhotoyypF in CameraVC.o "__T012AVFoundation39_AVCapturePhotoSettingsSwiftNativeTypesPAAE016availablePreviewc11PixelFormatG0SaySo8NSNumberCGfg", referenced from: __T06SpotMi8CameraVCC12capturePhotoyypF in CameraVC.o ld: symbol(s) not found for architecture arm64 I am out of clues. Any help will be much appreciated.

Cheers!

Solution

  • There is a bug in XCode9. Apple inadvertendly made some functions in AVFoundation private.

    Workaround:

    Change availablePreviewPhotoPixelFormatTypes to __availablePreviewPhotoPixelFormatTypes in your source.

    Same goes for the following:

    supportedColorSpaces -> __supportedColorSpaces

    supportedFlashModes -> __supportedFlashModes

    availableRawPhotoPixelFormatTypes -> __availableRawPhotoPixelFormatTypes

    availablePhotoPixelFormatTypes -> __availablePhotoPixelFormatTypes

    Then it might compile! Good Luck!