Try Sample AVCAM from apple found error

10
votes

When I tried sample AVCAM swift with Xcode Version 9.0 beta 5 (9M202q). I found errors.

Undefined symbols for architecture x86_64:
"__T0So22AVCapturePhotoSettingsC12AVFoundation01_abC16SwiftNativeTypesACWP", referenced from: __T05AVCam20CameraViewControllerC12capturePhoto33_F53A4CF98D799BDDCA6C04BA14C549A1LLySo8UIButtonCFyycfU_ in CameraViewController.o
"__T012AVFoundation39_AVCapturePhotoSettingsSwiftNativeTypesPAAE016availablePreviewc11PixelFormatG0Says6UInt32VGfg", referenced from: __T05AVCam20CameraViewControllerC12capturePhoto33_F53A4CF98D799BDDCA6C04BA14C549A1LLySo8UIButtonCFyycfU_ in CameraViewController.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)

What is the problem? and How can fix that?

4
iosswiftxcodeios11
your library does not support for simulator, check once in device - Anbu.Karthik
I will try your solution. I will update later - David Sujarwadi
@Anbu.Karthik I tried building without device it doesn't work. Now I tried build with device some problem. Do you know how to fixed it? - David Sujarwadi
wht is the problem - Anbu.Karthik
@aBikis please see the official workaround: stackoverflow.com/a/45861760/333733 - gbhall

4 Answers

24
votes

Update 15 Sept 2017:

Official response from Apple:

Our apologies. For apps using Swift 3.2 or Swift 4.0, several AVFoundation capture APIs (public extensions on external protocol) were inadvertently marked private in Xcode 9. The following AVFoundation API are temporarily unavailable:

  • AVCaptureDevice.Format.supportedColorSpaces

  • AVCaptureDevice.supportedFlashModes

  • AVCapturePhotoOutput.availablePhotoPixelFormatTypes

  • AVCapturePhotoOutput.availableRawPhotoPixelFormatTypes

  • AVCapturePhotoSettings.availablePreviewPhotoPixelFormatTypes

    As a workaround you can use the SwiftPrivate versions of these API by prepending each API with double underscore (__). For example, change AVCaptureDevice.Format.supportedColorSpaces to AVCaptureDevice.Format.__supportedColorSpaces.

I can confirm using __availablePreviewPhotoPixelFormatTypes fixes the build errors.

E.g. 

let settings = AVCapturePhotoSettings()
let previewPixelType = settings.__availablePreviewPhotoPixelFormatTypes.first!

Source: https://forums.developer.apple.com/thread/86810#259270

Update 14 Sept 2017:

Issue reoccurs in Xcode 9.0 GM (9A235).

Filed new bug report for reference: rdar://34420979

Previous:

Update: Fixed in Xcode Beta 6.

Filed a bug report rdar://33935456 for Xcode Version 9.0 beta 5 (9M202q).

9
votes

Xcode 9.0 beta 5 (9M202q) definitely has a problem with AVCam Swift revision 2017-06-06. Fortunately the problem is isolated to these three lines in CameraViewController.swift:

if !photoSettings.availablePreviewPhotoPixelFormatTypes.isEmpty {
    photoSettings.previewPhotoFormat = [kCVPixelBufferPixelFormatTypeKey as String: photoSettings.availablePreviewPhotoPixelFormatTypes.first!]
}

Comment out the above code and AVCam will compile and run fine on a device running the latest iOS 11 beta.

1
votes

This appears to be an Xcode bug. The sample code builds fine in Xcode 9.0 beta (9M136h). Reported to Apple as rdar://33903950.

Update: Radar is now closed. Issue is fixed in Xcode 9.0 Beta 6 (9M214v).

-2
votes

Try to add AVFoundation to linked frameworks (Target -> Build Phases -> Link Binary with Libraries)