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comment charger l'image à partir du chemin local ios Swift (par chemin)

Dans mon application, je stocke une image dans le stockage local et j'enregistre le chemin de cette image dans ma base de données. Comment puis-je charger l'image à partir de ce chemin?

Voici le code que j'utilise pour sauvegarder l'image:

 let myimage : UIImage = UIImage(data: data)!
            let fileManager = NSFileManager.defaultManager()
            let urls = fileManager.URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)
            let documentDirectory = urls[0] as NSURL


            print(documentDirectory)
            let currentDate = NSDate()

            let dateFormatter = NSDateFormatter()
            dateFormatter.dateStyle = .NoStyle
            dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
            let convertedDate = dateFormatter.stringFromDate(currentDate)
            let imageURL = documentDirectory.URLByAppendingPathComponent(convertedDate)
            imageUrlPath  = imageURL.absoluteString
            print(imageUrlPath)
            UIImageJPEGRepresentation(myimage,1.0)!.writeToFile(imageUrlPath, atomically: true)

Et c'est le chemin où mon image stockée

file:///var/mobile/Containers/Data/Application/B2A1EE50-D800-4BB0-B475-6C7F210C913C/Documents/2016-06-01%2021:49:32

C'est comme ça que j'ai essayé de récupérer l'image mais elle n'affiche rien.

let image : String = person?.valueForKey("image_local_path") as! String
        print(person!.valueForKey("image_local_path")! as! String)
        cell.img_message_music.image = UIImage(contentsOfFile: image)
iosswiftimagensdocumentdirectory
19
Jack.Right

Dossier/B2A1EE50- ... change à chaque fois que vous exécutez l'application.

../Application/B2A1EE50-D800-4BB0-B475-6C7F210C913C/Documents/..

Ce qui fonctionne pour moi, c'est de stocker fileName et d'obtenir le dossier des documents.

Swift 3 +

Créer un getter pour le dossier du répertoire

var documentsUrl: URL {
    return FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
}

Enregistrer l'image:

private func save(image: UIImage) -> String? {
    let fileName = "FileName"
    let fileURL = documentsUrl.appendingPathComponent(fileName)
    if let imageData = UIImageJPEGRepresentation(image, 1.0) {
       try? imageData.write(to: fileURL, options: .atomic)
       return fileName // ----> Save fileName
    }
    print("Error saving image")
    return nil
}

Charger l'image:

private func load(fileName: String) -> UIImage? {
    let fileURL = documentsUrl.appendingPathComponent(fileName)
    do {
        let imageData = try Data(contentsOf: fileURL)
        return UIImage(data: imageData)
    } catch {
        print("Error loading image : \(error)")
    }
    return nil
}
37
zsyesenko

Vous pouvez également essayer ceci.

  1. Vérifiez si votre chemin existe

if NSFileManager.defaultManager().fileExistsAtPath(imageUrlPath) {}

  1. Créez une URL vers votre chemin

let url = NSURL(string: imageUrlPath)

  1. Créez des données pour votre URL

let data = NSData(contentsOfURL: url!)

  1. Liez l'url à votre imageView

imageView.image = UIImage(data: data!)

Code final :

if NSFileManager.defaultManager().fileExistsAtPath(imageUrlPath) {
    let url = NSURL(string: imageUrlPath)
    let data = NSData(contentsOfURL: url!)
    imageView.image = UIImage(data: data!)
}
9
Jimmy James

Ce code fonctionne pour moi

func getImageFromDir(_ imageName: String) -> UIImage? {

    if let documentsUrl = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first {
        let fileURL = documentsUrl.appendingPathComponent(imageName)
        do {
            let imageData = try Data(contentsOf: fileURL)
            return UIImage(data: imageData)
        } catch {
            print("Not able to load image")
        }
    }
    return nil
}
3
Pankaj Jangid

Swift 4:

if FileManager.default.fileExists(atPath: imageUrlPath) {
            let url = NSURL(string: imageUrlPath)
            let data = NSData(contentsOf: url! as URL)

            chapterImage.image = UIImage(data: data! as Data)
        }
3
Konstantin Komarov

Cet exemple de code peut faire économiser de la frappe à quelqu'un,

écrire un UIImage sur le disque dans votre propre répertoire:

IM = UIImage, your image. for example, IM = someUIView.image or from the camera

let newPhotoFileName = randomNameString() + ".jpeg"
let imagePath = checkedImageDirectoryStringPath() + "/" + newPhotoFileName

let imData = UIImageJPEGRepresentation(IM, 0.20)
FileManager.default.createFile(atPath: imagePath, contents: imData, attributes: nil)

print("saved at filename \(newPhotoFileName)")

plus tard pour lire cette image ...

.. et le reconvertir en UIImage comme dans un UIImageView

NAME = that filename, like jahgfdfs.jpg

let p = checkedImageDirectoryStringPath() + "/" + NAME
devCheckExists(fullPath: p)

var imageData: Data? = nil
do {
    let u = URL(fileURLWithPath: p)
    imageData = try Data(contentsOf: u)
}
catch {
    print("catastrophe loading file?? \(error)")
    return
}

// and then to "make that an image again"...

imageData != nil {

    picture.image = UIImage(data: imageData!)
    print("that seemed to work")
}
else {

    print("the imageData is nil?")
}

// or for example...

Alamofire.upload(
    multipartFormData: { (multipartFormData) in
        multipartFormData.append(imageData!,
           withName: "file", fileName: "", mimeType: "image/jpeg")
    ...

Voici les fonctions extrêmement pratiques utilisées ci-dessus ...

func checkedImageDirectoryStringPath()->String {

    // create/check OUR OWN IMAGE DIRECTORY for use of this app.

    let paths = NSSearchPathForDirectoriesInDomains(
                      .documentDirectory, .userDomainMask, true)

    if paths.count < 1 {
        print("some sort of disaster finding the our Image Directory - giving up")
        return "x"
        // any return will lead to disaster, so just do that
        // (it will then gracefully fail when you "try" to write etc)
    }

    let docDirPath: String = paths.first!
    let ourDirectoryPath = docDirPath.appending("/YourCompanyName")
    // so simply makes a directory called "YourCompanyName"
    // which will be there for all time, for your use

    var ocb: ObjCBool = true
    let exists = FileManager.default.fileExists(
                  atPath: ourDirectoryPath, isDirectory: &ocb)

    if !exists {
        do {
            try FileManager.default.createDirectory(
                    atPath: ourDirectoryPath,
                    withIntermediateDirectories: false,
                    attributes: nil)

            print("we did create our Image Directory, for the first time.")
            // never need to again
            return ourDirectoryPath
        }
        catch {
            print(error.localizedDescription)
            print("disaster trying to make our Image Directory?")
            return "x"
            // any return will lead to disaster, so just do that
        }
    }

    else {

        // already exists, as usual.
        return ourDirectoryPath
    }
}

et

func randomNameString(length: Int = 7)->String{

    enum s {
        static let c = Array("abcdefghjklmnpqrstuvwxyz12345789".characters)
        static let k = UInt32(c.count)
    }

    var result = [Character](repeating: "a", count: length)

    for i in 0..<length {
        let r = Int(arc4random_uniform(s.k))
        result[i] = s.c[r]
    }

    return String(result)
}

et

func devCheckExists(fullPath: String) {

    var ocb: ObjCBool = false
    let itExists = FileManager.default.fileExists(atPath: fullPath, isDirectory: &ocb)
    if !itExists {
        // alert developer. processes will fail at next step
        print("\n\nDOES NOT EXIST\n\(fullPath)\n\n")
    }
}
1
Fattie

Remplacez absoluteString par path

let myimage : UIImage = UIImage(data: data)!
        let fileManager = NSFileManager.defaultManager()
        let urls = fileManager.URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)
        let documentDirectory = urls[0] as NSURL


        print(documentDirectory)
        let currentDate = NSDate()

        let dateFormatter = NSDateFormatter()
        dateFormatter.dateStyle = .NoStyle
        dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
        let convertedDate = dateFormatter.stringFromDate(currentDate)
        let imageURL = documentDirectory.URLByAppendingPathComponent(convertedDate)
        imageUrlPath  = imageURL.path
        print(imageUrlPath)
        UIImageJPEGRepresentation(myimage,1.0)!.writeToFile(imageUrlPath, atomically: true)
1
iYoung