我正在尝试向用户提供照片库中的图像选择。因此，我正在使用UIImagePickerController进行选择。但是，在文件系统中获取其初始URL会带来一个问题（CKAsset需要此文件）。
我的代码。
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {
let imageURL = info[UIImagePickerControllerReferenceURL] as NSURL
let path = imageURL.path!
let imageName = path.lastPathComponent
let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)
let documentDirectory = paths.first as String!
let localPath = documentDirectory + "/" + imageName
let imageData = NSData(contentsOfFile: localPath)!
let image = UIImage(data: imageData)!
picker.dismissViewControllerAnimated(true, completion: nil)
}
imageURL有点神秘。它描述了资产URL，但没有描述文件系统中的一个。它看起来像：assets-library://asset/asset.JPG?id=B6C0A21C-07C3-493D-8B44-3BA4C9981C25&ext=JPG。
根据此逻辑，路径是/asset.JPG，其中asset.JPG是图像的名称。
然后，我正在访问我的Documents文件夹并尝试在其中找到具有路径的文件：
/ Users / Eugene / Library / Developer / CoreSimulator / Devices / 3C5E9A23-8220-4B37-BD14-F1E42EEC2C7C / data / Containers / Data / Application / 20EBAAE2-6C6F-4651-A48F-16A222CCB3A2 / Documents / asset.JPG
也很隐秘，但是对于不存在的图像来说似乎是真实的路径...找不到具有该路径的图像。这让我恶心。
我是否必须从头开始保存图像？还是还有其他路要走？
我已经使用AssetsLibrary API浏览了几本教程，但是没有发现任何有用的解决方案。预先谢谢！
好的，我已经解决了这个问题。
您要做的就是简单地抓取图像（info[UIImagePickerControllerOriginalImage] as UIImage）并保存到给定目录。如果您只需要保存1张图片，那么效果很好。下面的代码ID。
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {
let imageURL = info[UIImagePickerControllerReferenceURL] as NSURL
let imageName = imageURL.path!.lastPathComponent
let documentDirectory = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).first as String
let localPath = documentDirectory.stringByAppendingPathComponent(imageName)
let image = info[UIImagePickerControllerOriginalImage] as UIImage
let data = UIImagePNGRepresentation(image)
data.writeToFile(localPath, atomically: true)
let imageData = NSData(contentsOfFile: localPath)!
let photoURL = NSURL(fileURLWithPath: localPath)
let imageWithData = UIImage(data: imageData)!
picker.dismissViewControllerAnimated(true, completion: nil)
}
在SWIFT 4]中，您可以尝试使用，它工作正常。
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
if let imgUrl = info[UIImagePickerControllerImageURL] as? URL{
let imgName = imgUrl.lastPathComponent
let documentDirectory = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first
let localPath = documentDirectory?.appending(imgName)
let image = info[UIImagePickerControllerOriginalImage] as! UIImage
let data = UIImagePNGRepresentation(image)! as NSData
data.write(toFile: localPath!, atomically: true)
//let imageData = NSData(contentsOfFile: localPath!)!
let photoURL = URL.init(fileURLWithPath: localPath!)//NSURL(fileURLWithPath: localPath!)
print(photoURL)
}
APPDEL.window?.rootViewController?.dismiss(animated: true, completion: nil)
}
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {
//this block of code grabs the path of the file
let imageURL = info[UIImagePickerControllerReferenceURL] as NSURL
let imagePath = imageURL.path!
let localPath = NSURL(fileURLWithPath: NSTemporaryDirectory()).URLByAppendingPathComponent(imagePath)
//this block of code adds data to the above path
let path = localPath.relativePath!
let imageName = info[UIImagePickerControllerOriginalImage] as UIImage
let data = UIImagePNGRepresentation(imageName)
data?.writeToFile(imagePath, atomically: true)
//this block grabs the NSURL so you can use it in CKASSET
let photoURL = NSURL(fileURLWithPath: path)
}
检查此解决方案。
快速4
let imgUrl = info[UIImagePickerController.InfoKey.imageURL] as? URL
对于Swift 5+，根据@Jaydip回答