Question

我试图摆脱使用 AVFoundation 拍摄的照片中的 EXIF 数据，如何在swift（2）中执行此操作首选，Objective-C也没关系，我知道如何将代码转换为swift。

为什么吗 我完成了我的研究，我发现许多着名的Social Media（Reddit Source等等）确实删除了EXIF数据以用于身份和其他目的。

如果您认为这是重复的帖子，请阅读我提出的问题并提供链接。谢谢。

Answer 1

我的回答很基于this previous question。我修改了代码以使用Swift 2.0。

let imageData = ImageHelper.removeExifData(UIImagePNGRepresentation(image))

然后你可以简单地做这样的事情：

在我的示例中，我删除了旋转和EXIF数据。如果您需要删除其他任何内容，可以轻松搜索密钥。只需对生成的数据进行额外检查，因为它是可选的。

Answer 2

你有UIImage吗？然后，您可以将UIImage转换为数据并将其再次保存到图像，新图像将不具有任何EXIF数据

Swift 3

let imageData:Data = UIImagePNGRepresentation(image!)!



func saveToPhotoLibrary_iOS9(data:NSData, completionHandler: @escaping (PHAsset?)->()) {
    var assetIdentifier: String?
    PHPhotoLibrary.requestAuthorization { (status:PHAuthorizationStatus) in
        if(status == PHAuthorizationStatus.authorized){

            PHPhotoLibrary.shared().performChanges({
                let creationRequest = PHAssetCreationRequest.forAsset()
                let placeholder = creationRequest.placeholderForCreatedAsset

                creationRequest.addResource(with: PHAssetResourceType.photo, data: data as Data, options: nil)
                assetIdentifier = placeholder?.localIdentifier

            }, completionHandler: { (success, error) in
                if let error = error {
                    print("There was an error saving to the photo library: \(error)")
                }

                var asset: PHAsset? = nil
                if let assetIdentifier = assetIdentifier{
                    asset = PHAsset.fetchAssets(withLocalIdentifiers: [assetIdentifier], options: nil).firstObject//fetchAssetsWithLocalIdentifiers([assetIdentifier], options: nil).firstObject as? PHAsset
                }
                completionHandler(asset)
            })
        }else {
            print("Need authorisation to write to the photo library")
            completionHandler(nil)
        }
    }

}

Answer 3

已接受答案的 Swift 5 版本：

extension Data {
    func byRemovingEXIF() -> Data? {
        guard let source = CGImageSourceCreateWithData(self as NSData, nil),
              let type = CGImageSourceGetType(source) else
        {
            return nil
        }

        let count = CGImageSourceGetCount(source)
        let mutableData = NSMutableData()
        guard let destination = CGImageDestinationCreateWithData(mutableData, type, count, nil) else {
            return nil
        }

        let exifToRemove: CFDictionary = [
            kCGImagePropertyExifDictionary: kCFNull,
            kCGImagePropertyGPSDictionary: kCFNull,
        ] as CFDictionary

        for index in 0 ..< count {
            CGImageDestinationAddImageFromSource(destination, source, index, exifToRemove)
            if !CGImageDestinationFinalize(destination) {
                print("Failed to finalize")
            }
        }

        return mutableData as Data
    }
}

Swift：如何从AVFoundation拍摄的照片中删除EXIF数据？

3 个答案: