在 IOS 中使用 AVFoundation 捕获相机图像和实时滤镜

Question

我正在制作 Live Sticker 应用程序并使用 AVFoundation 捕获图像。我遇到的问题是，当我保存图像时，它只保存图像而不是图像上的贴纸我有 2 个问题
1=>用动态贴纸保存图像 2=> 将图像方向更改为纵向模式

相机预览图层代码I am getting just image not live sticker

I want to save image with sticker like shown in image but getting only image

     func setupCameraPreview() {
    self.previewLayer = AVCaptureVideoPreviewLayer(session: self.session)
    self.previewLayer.videoGravity = AVLayerVideoGravity.resizeAspect
    let rootLayer = self.overlay.layer

    rootLayer.masksToBounds = true
    self.previewLayer.frame = rootLayer.bounds
    rootLayer.addSublayer(self.previewLayer)
}

我正在使用此代码保存图像

    private func imageFromSampleBuffer(sampleBuffer: CMSampleBuffer) -> UIImage? {
    guard let imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer) else { return nil }
    let ciImage = CIImage(cvPixelBuffer: imageBuffer)
    let context = CIContext()
    guard let cgImage = context.createCGImage(ciImage, from: ciImage.extent) else { return nil }
    return UIImage(cgImage: cgImage)
}

Answer 1

你必须连同叠加贴纸一起绘制图像。

假设您在 preview 视图中添加了贴纸。
image 是您从 imageFromSampleBuffer 或 stillImage

获得的图像

var imageView = UIImageView(image: image)
imageView.frame = preview.bounds
//   imageView.contentMode = UIViewContentModeScaleAspectFit;
preview.addSubview(imageView)
preview.sendSubview(toBack: imageView)
var layer: CALayer? = preview.layer
UIGraphicsBeginImageContextWithOptions((layer?.frame.size)!, false, 0.0)
if let aContext = UIGraphicsGetCurrentContext() {
    layer?.render(in: aContext)
}
var img: UIImage? = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()

 self.yourImageView.image = img

在 IOS 中使用 AVFoundation 捕获相机图像和实时滤镜

Capture camera image along with live filters Using AVFoundation in IOS

avfoundation

ios

swift4