i am trying to get the file name from image pathurl
but i am getting an error like "Cannot convert value of type 'URL' to type 'NSString' in coercion"can anyone help me to convert as NSstring .Thanks in advance
if var imgUrl = info[UIImagePickerController.InfoKey.imageURL] as? URL{
let imgName = imgUrl.lastPathComponent
let documentDirectory = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first
let localPath = documentDirectory?.appending(imgName)
var 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)
let filename = (photoURL as NSString).lastPathComponent
// pdfURL is your file url
let fileExtention = (filename as NSString).pathExtension // get your file extension
let pathPrefix = (filename as NSString).deletingPathExtension
img.image = image
(In Swift) all methods for path manipulation are in the URL struct. No conversion needed
let filename = photoURL.lastPathComponent
// pdfURL is your file url
let fileExtention = photoURL.pathExtension // get your file extension
let pathPrefix = photoURL.deletingPathExtension.lastPathComponent
img.image = image
And don't use NS classes in Swift at all if there is a native equivalent.
And please consider warnings like
Variable 'image' was never mutated; consider changing to 'let' constant
Related
In my application, I am writing an image to a URL file and saving the relative URL in order to retrieve the image later on. This is what I am doing, but it is not working. Is there anything you see wrong.
let imageRelativeURL = pendingPostData[2]
let documentsPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as NSString
let urlString = "\(documentsPath)/\(imageRelativeURL).jpg"
let image = UIImage(contentsOfFile: urlString)
// This is the line that is causing the error
let imageData = UIImageJPEGRepresentation(image!, 1.0)
I am getting this error:
Thread 1: FATAL ERROR: Unexpectedly found nil while wrapping an Optional Value
This is how I am saving the relative URL.
let uniqueRelativeID = NSUUID().uuidString
let documentsPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as NSString
let outputPath = "\(documentsPath)/\(uniqueRelativeID).jpg"
let relativePath = "\(uniqueRelativeID).jpg"
let relativeURL = URL(fileURLWithPath: relativePath)
let imageURL = URL(fileURLWithPath: outputPath, relativeTo: relativeURL)
do {
try UIImageJPEGRepresentation(chosenImg, 1.0)?.write(to: imageURL)
} catch {
print("There was a problem writing image file.")
}
saveVideoData(data: imageURL.relativeString)
i have a bunch of images in my App's Documents Directory. i want to load one of them in an UIImage that i have in my view. this is what i do:
myImage.image = UIImage(named: "image.jpg") // the file exist but this returns nil
I also tried to init the image using:
myImage.image = UIImage(contentsOfFile: imagePath) //this also doesn't work but the path i got starts (at least in the sim) with file://
Anyone can suggest something? I'm kinda a noob in iOS programming.
Thanks
EDIT:
imagePath comes from:
func getImgPath(name: String) -> String
{
let documentsDirectory = self.getDocumentsDirectory()
let fullpath = documentsDirectory.appendingPathComponent(name)
return fullpath.absoluteString
}
This might help
let documentDirectory = FileManager.SearchPathDirectory.documentDirectory
let userDomainMask = FileManager.SearchPathDomainMask.userDomainMask
let paths = NSSearchPathForDirectoriesInDomains(documentDirectory, userDomainMask, true)
if let dirPath = paths.first
{
let imageURL = URL(fileURLWithPath: dirPath).appendingPathComponent("name.png")
let image = UIImage(contentsOfFile: imageURL.path)
// Do whatever you want with the image
}
Try adding your images under Assets.xcassets. Then you'll be able to reference your image by:
UIImage(named: 'yourImageName')
You can conveniently add images with various size settings.
You can get the path of the image as fowllows:
let imagePath = try! FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true).appendingPathComponent("image.jpg")
If this doesn't work, check if your file name is correct.
I understand that if you are downloading images from internet means, you need to convert the URL to UIImage
if let url = URL(string: "your url") {
let data = try? Data(contentsOf: url)
if let imageData = data {
if let image = UIImage(data: imageData) {
imageView.image = image
}
}
}
If i understand your question correct, this will be the answer.
I am saving path in Database return by UIImagepicker from Gallery
let imageURL = info[UIImagePickerControllerReferenceURL] as! NSURL
let imageName = imageURL.lastPathComponent
let documentDirectory = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).first! as String
//let localPath = documentDirectory.stringByAppendingPathComponent(imageName!)
let imagePath = String("\(documentDirectory)/\(imageName!)")
where path look like
/Users/kshitijghule/Library/Developer/CoreSimulator/Devices/3AC7B500-E980-4A00-BC32-34FA3C7DDE8A/data/Containers/Data/Application/838FB5A1-4448-46C9-8BEC-2E939668B97D/Documents/asset.JPG
Now i want load this image from this path.
i used this code
let url = NSURL(string:"/Users/kshitijghule/Library/Developer/CoreSimulator/Devices/3AC7B500-E980-4A00-BC32-34FA3C7DDE8A/data/Containers/Data/Application/838FB5A1-4448-46C9-8BEC-2E939668B97D/Documents/asset.JPG")!//path from database but mention static
let imageData = NSData(contentsOfURL:url)!
cell?.petImageView.image = UIImage(data: imageData)
But i am getting crash at line
let imageData = NSData(contentsOfURL:url)!
How to fix this issue? It will work on device ?
If you are storing images in the document directory store only image name in the db
At the time of retrieval append the current document directory path with your image name like you done at save time
let documentDirectory = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).first! as String
//let localPath = documentDirectory.stringByAppendingPathComponent(imageName!)
//imageName which you have stored in the db at retrieval time
let imagePath = String("\(documentDirectory)/\(imageName!)")
let url = NSURL(string:imagePath)
let imageData = NSData(contentsOfURL:url)!
as i have also this type of issue at last if found that the app number of simulator(838FB5A1-4448-46C9-8BEC-2E939668B97D) is changes which cause the issue
Hope this may solve your issue
I have answered a similar question here.You only have to save those paths to your database, and from the database path you can retrieve those images.
Save image in Document Directory taken from Gallery or Camera.
func origionalImage(origionalImage: UIImage!, editedImage: UIImage!, userInfo info: [NSObject : AnyObject]!) {
let imageData = NSData(data:UIImagePNGRepresentation(origionalImage)!)
let paths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)
let docs: String = paths[0]
let imageName = self.randomStringWithLength(6) as String
//imageName can save in sqlite to load image later
let fullPath = String("\(docs)/\(imageName).png")
print(fullPath)
let result = imageData.writeToFile(fullPath, atomically: true)
print("FILE WRITTEN SUCCESS=>:\(result)")
}
Load Image from Database
let tempDBObject = self.petListArray[indexPath.row] as! Database
cell?.petName.text = tempDBObject.Hname
//Doc Path
let documentDirectory = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).first! as String
let imagePath = String("\(documentDirectory)/\(tempDBObject.Hpath!)")
if imagePath == "" {
}else{
cell?.petImageView.image = UIImage(contentsOfFile: imagePath)
}
I am developing an app where user can save 13 screenshots and display them on a single view as thumbnails or as a full screen image. This is how I save the screenshots:
let fileName:String = self.stickerUsed + "saved" + ".png"
var arrayPaths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as! NSString
var pngFileName = arrayPaths.stringByAppendingPathComponent(fileName)
UIImagePNGRepresentation(resizeImage(screenshot!, newSize: CGSizeMake(self.view.frame.width, self.view.frame.height))).writeToFile(pngFileName, atomically:true)
NSUserDefaults.standardUserDefaults().setObject(pngFileName, forKey: self.stickerUsed)
NSUserDefaults.standardUserDefaults().synchronize()
and this is how i retrieve them:
var defaultName:String = self.stickerUsed + "saved" + ".png"
let path = NSSearchPathForDirectoriesInDomains(
.DocumentDirectory, .UserDomainMask, true)[0] as! NSString
let fileName = NSUserDefaults.standardUserDefaults()
.stringForKey(stickerUsed) ?? defaultName
let imagePath = path.stringByAppendingPathComponent(fileName)
let image = UIImage(named: imagePath )
How do i overwrite the saved images ? When i use the code to save imageof a different screenshot with same filename and then retrieve it i get the previous image that was initially saved and new image is not overwritten!
I made your code cleaner and fixed the problem! Comments will help you learn some basic stuff about how it works.
First, define function that gives you full filepath from filename:
func documentsPathWithFileName(fileName : String) -> String {
// Get file path to document directory root
let documentsDirectoryPath = NSSearchPathForDirectoriesInDomains(.CachesDirectory, .UserDomainMask, true)[0] as! String
return documentsDirectoryPath.stringByAppendingPathComponent(fileName)
}
And then, function that takes UIImage and saves it, or replaces it, depending:
func saveOverrideImage(screenshot : UIImage, stickerName : String) {
// Get file path poining to documents directory
let filePath = documentsPathWithFileName(stickerName)
// We could try if there is file in this path (.fileExistsAtPath())
// BUT we can also just call delete function, because it checks by itself
NSFileManager.defaultManager().removeItemAtPath(filePath, error: nil)
// Resize image as you want
let image : NSData = UIImagePNGRepresentation(resizeImage(screenshot!, newSize: CGSizeMake(self.view.frame.width, self.view.frame.height)))
// Write new image
image.writeToFile(filePath, atomically: true)
// Save your stuff to
NSUserDefaults.standardUserDefaults().setObject(stickerName, forKey: self.stickerUsed)
NSUserDefaults.standardUserDefaults().synchronize()
}
Also, following the same style, you can get image:
func imageForStickerName(stickerName : String) -> UIImage? {
// Get file path poining to documents directory
let filePath = documentsPathWithFileName(stickerName)
// Get image from file on given local url
return UIImage(contentsOfFile: filePath)
}
Hope it helps!
Try You can use
var error:NSError?
var resultingURL:NSURL?
let oldURL:NSURL = NSURL.fileURLWithPath("<old path>")!
let newURL:NSURL = NSURL.fileURLWithPath("<new path>")!
fileManager.replaceItemAtURL(oldURL,
withItemAtURL: newURL,
backupItemName: nil,
options: .UsingNewMetadataOnly,
resultingItemURL: &resultingURL,
error: &error)
or you can delete old file and write new on, for more details on FileManager visit here
I'm trying to save, and later load, an image from disk. The following works on the simulator, but when I test on the device, I get unexpectedly found nil while unwrapping an Optional value.
Saving image to disk:
let sketchData: NSData = UIImagePNGRepresentation(sketch)
let destinationFolder: String = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as String
let sketchPath: String = "\(destinationFolder)\(currentProjectID).png"
defaults.setObject(sketchPath, forKey: "sketchpath")
sketchData.writeToFile(sketchPath, atomically: true)
Loading image from disk:
let sketchPath: String = defaults.objectForKey("sketchpath") as String
let image = UIImage(contentsOfFile: sketchPath)
Here's an example path. It's identical in saving and loading, so the issue is not trying to load from a different file path.
/var/mobile/Containers/Data/Application/72EDBC3D-F9D8-4108-8A64-751A10FF1E71/Documents4.png
Does saving to an actual device require a different file path?
You just forgot to add "/" between the folder and the file's name:
let sketchPath: String = "\(destinationFolder)/\(currentProjectID).png"
You should use stringByAppendingPathComponent and stringByAppendingPathExtension:
let currentProjectID = "Test"
// you can also use NSFileManager's method URLsForDirectory to find the device's DocumentDirectory
let destinationFolder = (NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask).first as NSURL).path!
let sketchPath = destinationFolder.stringByAppendingPathComponent(currentProjectID).stringByAppendingPathExtension("png")!
You are also saving it as NSData so you should load it as NSData
let imageData: NSData = UIImagePNGRepresentation(UIImage(data: NSData(contentsOfURL: NSURL(string:"http://i.stack.imgur.com/Xs4RX.jpg")!)! ))
imageData.writeToFile(sketchPath, atomically: true)
let loadedImage = UIImage(data: NSData(contentsOfFile: sketchPath)! )!!