Xcode 12. 'AVCapturePhotoOutput' 类型的值没有成员 'supportedFlashModes'

Question

在新的 Xcode 12 中，出现错误：Value of type 'AVCapturePhotoOutput' has no member 'supportedFlashModes' 当我尝试到达 https://developer.apple.com/documentation/avfoundation/avcapturephotooutput/1648766-supportedflashmodes 有什么建议吗？

Answer 1

似乎是 Xcode 12 上的错误，但您可以使用宏条件解决它：

#if !targetEnvironment(simulator)
guard stillImageOutput?.supportedFlashModes.contains(mode) == true else { return }
//rest of your code
#endif

Answer 2

正如@Andy Heard wrote:

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.

Answer 3

对于XCode 12回归（叹息），你可以像这样使用__版本

    var flashModesSupported: [AVCaptureDevice.FlashMode] {
        #if targetEnvironment(simulator)
        return self.photoOutput.__supportedFlashModes.compactMap { AVCaptureDevice.FlashMode.init(rawValue: [=10=].intValue) }
        #else
        return self.photoOutput.supportedFlashModes
        #endif
    }

有一份报告没有触发 SPI（因此，可以安全地提交到应用商店）

Answer 4

你可以试试这个：

let device2 = AVCapturePhotoOutput()

if (device2.supportedFlashModes.contains(.auto)){

} else {
            
}

Xcode 12. 'AVCapturePhotoOutput' 类型的值没有成员 'supportedFlashModes'

Xcode 12. Value of type 'AVCapturePhotoOutput' has no member 'supportedFlashModes'

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