how to load image from local path ios swift (by path)

Question

In my app I am storing an image in local storage and I am saving the path of that image in my database. How can I load the image from that path?

Here is the code I a

Answer 1

This is working for me and I think is a fast and clean way to do it.

Swift 5.0

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)
let imageData = try? Data(contentsOf: imageUrl)
let image = UIImage(data: imageData!)

Where "imageUrl" is the value of your imageURL from documents folder. And "image" is the resulting image you can use anywhere you need.

Answer 2

This sample code may save someone some typing,

write an UIImage to disk in your own directory:

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)")

later to read that image ...

.. and convert it back to a UIImage as in a 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")
    ...

Here are the extremely handy functions used above...

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
    }
}

and

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)
}

and

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")
    }
}