多亏了Sharpkits，我找到了解决方案（此代码对我有用）：
func capture(_ captureOutput: AVCapturePhotoOutput, didFinishProcessingPhotoSampleBuffer photoSampleBuffer: CMSampleBuffer?, previewPhotoSampleBuffer: CMSampleBuffer?, resolvedSettings: AVCaptureResolvedPhotoSettings, bracketSettings: AVCaptureBracketedStillImageSettings?, error: Error?) { if let error = error { print(error.localizedDescription) } if let sampleBuffer = photoSampleBuffer, let previewBuffer = previewPhotoSampleBuffer, let dataImage = AVCapturePhotoOutput.jpegPhotoDataRepresentation(forJPEGSampleBuffer: sampleBuffer, previewPhotoSampleBuffer: previewBuffer) { let imageData = AVCapturePhotoOutput.jpegPhotoDataRepresentation(forJPEGSampleBuffer: sampleBuffer, previewPhotoSampleBuffer: nil) let dataProvider = CGDataProvider(data: imageData as! CFData) let cgImageRef = CGImage(jpegDataProviderSource: dataProvider!, depre: nil, shouldInterpolate: true, intent: CGColorRenderingIntent.absoluteColorimetric) let image = UIImage(cgImage: cgImageRef!, scale: 1.0, orientation: UIImageOrientation.right) let cropedImage = self.cropToSquare(image: image) let newImage = self.scaleImageWith(cropedImage, and: CGSize(width: 600, height: 600)) print(UIScreen.main.bounds.width) self.tempImageView.image = newImage self.tempImageView.isHidden = false } else { } }
