我以纵向模式创建了AVCaptureVideoPreviewLayer,我想知道如何在保持纵向模式的同时以16:9比例(横向宽高比)显示它
我尝试过:
1。赋予Camera PreviewLayer 16:9大小,但显示为缩放
2。我尝试在此处使用videoPreviewLayer?.connection?.videoOrientation = AVCaptureVideoOrientation.landscape
的分辨率是完美的,但它显示为旋转图像(横向相机)
我想以横向宽高比将相机倾斜到人像或 具有横向宽高比的人像相机
答案 0 :(得分:0)
计算纵横比,然后相应缩放图像。
func imageWithImage (sourceImage:UIImage, scaledToWidth: CGFloat) -> UIImage {
let oldWidth = sourceImage.size.width
let scaleFactor = scaledToWidth / oldWidth
let newHeight = sourceImage.size.height * scaleFactor
let newWidth = oldWidth * scaleFactor
UIGraphicsBeginImageContext(CGSize(width:newWidth, height:newHeight))
sourceImage.draw(in: CGRect(x:0, y:0, width:newWidth, height:newHeight))
let newImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return newImage!
}