从ios swift中的图像获取位置详细信息

Posted 2023-03-08

【中文标题】从ios swift中的图像获取位置详细信息

【英文标题】：Getting location details from image in ios swift

【发布时间】：2017-12-12 06:15:36

【问题描述】：

我正在尝试使用从图像中获取位置详细信息 UIImagePickerControllerReferenceURL 但我发现 PHAsset.fetchAssets(withALAssetURLs: [URL], options: opts) 已被弃用。请帮助我获取位置详细信息。

我们可以使用PHAssetCollection吗？如果是请帮助我

   public func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any])

    print(info)
    let chosenImage = info[UIImagePickerControllerOriginalImage] as! UIImage
    selectedImage.contentMode = .scaleAspectFit
    selectedImage.image = chosenImage
    dismiss(animated:true, completion: nil)

    if let URL = info[UIImagePickerControllerReferenceURL] as? URL 
        let opts = PHFetchOptions()
        opts.fetchLimit = 1
        let assets = PHAsset.fetchAssets(withALAssetURLs: [URL], options: opts)
        let asset = assets[0]
        print(asset.location)
        // The location is "asset.location", as a CLLocation

        // ... Other stuff like dismiss omitted
    

【问题讨论】：

另一种选择是您可以将图像保存到 doc 目录并使用该路径。

【参考方案1】：

到目前为止，我发现的唯一解决方案是即使在 ios 11 中也使用 iOS 10 代码块，而忽略 UIImagePickerControllerReferenceURL deprecated 消息（密钥仍然存在并在 iOS 11 中有效）

import AssetsLibrary

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) 

    if let imageUrl = info[UIImagePickerControllerReferenceURL] as? NSURL
        print(imageUrl.absoluteString)  //"assets-library://asset/asset.JPG?id=ED7AC36B-A150-4C38-BB8C-B6D696F4F2ED&ext=JPG"


        // access image from URL
        let assetLibrary = ALAssetsLibrary()
        assetLibrary.asset(for: imageUrl as URL! , resultBlock:  (asset: ALAsset!) -> Void in
            if let actualAsset = asset as ALAsset? 
                let assetRep: ALAssetRepresentation = actualAsset.defaultRepresentation()
                let iref = assetRep.fullResolutionImage().takeUnretainedValue()
                let image = UIImage.init(cgImage: iref)
                self.img.image = image
            
        , failureBlock:  (error) -> Void in
        )
    

    dismiss(animated: true, completion: nil)

希望这会有所帮助。