Try Sample AVCAM from apple found error

Question

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

Undefined symbols for architecture x86_64:
\"__T0So22AVC

Answer 1

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.