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[英]How to avoid blocking the UI when using the iPhone camera via AVFoundation?
[英]how to get focal length of camera of iPhone using AVFoundation
如何找到 iPhone 相机镜头的焦距。 我已经通过这个找到了镜头光圈值:- let aperture = currentcamera?.lensAperture
print("Aperture of camera is:-",aperture!)
为此,您需要首先从相机中获取图像,然后从返回的 Exif 数据中读取其焦距属性。 示例代码在这里给出并复制如下以供参考:
// delegate method for the image picker
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
let metadata = info[UIImagePickerControllerMediaMetadata] as? NSDictionary
let exifdata = metadata!["{Exif}"] as! NSDictionary
// focal length
let focalLength = exifdata["FocalLength"] as! Double
print("Focal length \(focalLength)")
}
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