Question or problem with Swift language programming:
I’m trying to provide a user selection of an image from Photo Library. Thus I’m using UIImagePickerController for selecting. But here comes an issue with getting its initial URL in the file system (I need this for CKAsset).
My code.
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 is kinda cryptic. It describes Asset URL, but not one in File System. And it looks like: assets-library://asset/asset.JPG?id=B6C0A21C-07C3-493D-8B44-3BA4C9981C25&ext=JPG.
According to this logic the path is /asset.JPG where asset.JPG is a name of the image.
Then I’m accessing my Documents folder and trying to find there a file with path:
Cryptic as well but seems to be a real path for a not existing image… No image with that path can be found. And this makes me sick.
Do I have to save an image from the beginning? Or is there any other way to go?
I’ve looked through several tutorials using AssetsLibrary API but I didn’t find anything useful to solve my problem. Thank you in advance!
How to solve the problem:
Solution 1:
Okay, I’ve solved the issue.
All you have to do is simply grab the image (info[UIImagePickerControllerOriginalImage] as UIImage) and save to the given directory. If you need to save only 1 picture it works great. The code id below.
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)
}
Solution 2:
In SWIFT 4 u Can Try This, It’s working properly.
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)
}
Solution 3:
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)
}
Solution 4:
check this solution.
import AssetsLibrary
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
self.imagePicker = picker
if let selectedImage = info[UIImagePickerControllerOriginalImage] as? UIImage {
let controller = CropViewController(image: selectedImage )
controller.delegate = self
picker.presentViewController(controller, animated: true, completion: nil)
}
else if let imageUrl = info[UIImagePickerControllerReferenceURL] as? NSURL{
let assetLibrary = ALAssetsLibrary()
assetLibrary.assetForURL(imageUrl , resultBlock: { (asset: ALAsset!) -> Void in
if let actualAsset = asset as ALAsset? {
let assetRep: ALAssetRepresentation = actualAsset.defaultRepresentation()
let iref = assetRep.fullResolutionImage().takeUnretainedValue()
let image = UIImage(CGImage: iref)
let controller = CropViewController(image: image)
controller.delegate = self
picker.presentViewController(controller, animated: true, completion: nil)
}
}, failureBlock: { (error) -> Void in
})
}
}
Solution 5:
For Swift 5+ ;according to @Jaydip answer
if let imgUrl = info[UIImagePickerController.InfoKey.imageURL] as? URL{
let imgName = imgUrl.lastPathComponent
let documentDirectory = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first
let localPath = documentDirectory?.appending(imgName)
let image = info[UIImagePickerController.InfoKey.originalImage] as! UIImage
let data = image.pngData()! as NSData
data.write(toFile: localPath!, atomically: true)
//let imageData = NSData(contentsOfFile: localPath!)!
let photoURL = URL.init(fileURLWithPath: localPath!)//NSURL(fileURLWithPath: localPath!)
print(photoURL)
}
