Save UIImage array in NSUserDefaults

Question

I want to put a UIImage array into UserDefaults and then retrieve it. After that set the retrieved images in an image view. How can I do that?

Answer 1

First of all that is not ideal way to save image in user default but if you want you can do following things

Save

let imageData = NSKeyedArchiver.archivedData(withRootObject: placesArray)
UserDefaults.standard.set(imageData, forKey: "images")

Retrieve

       let imageData = UserDefaults.standard.object(forKey: "images") as? NSData

        if let imageData = imageData {
            let imageArray = NSKeyedUnarchiver.unarchiveObject(with: imageData as Data) as? [UIImage]!
            print(placesArray)
        }

Note: You should save your image in document directory and then save that name array to user default.

Save image in document directory

func saveImageDocumentDirectory(){
        let fileManager = NSFileManager.defaultManager()
        let paths = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as NSString).stringByAppendingPathComponent("apple.jpg")
        let image = UIImage(named: "apple.jpg")
        print(paths)
        let imageData = UIImageJPEGRepresentation(image!, 0.5)
        fileManager.createFileAtPath(paths as String, contents: imageData, attributes: nil)
    }

Retrieve image

func getImage(name : String){
        let fileManager = NSFileManager.defaultManager()
        let imagePAth = (self.getDirectoryPath() as NSString).stringByAppendingPathComponent(name)
        if fileManager.fileExistsAtPath(imagePAth){
            self.imageView.image = UIImage(contentsOfFile: imagePAth)
        }else{
            print("No Image")
        }
    }

func getDirectoryPath() -> String {
    let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)
    let documentsDirectory = paths[0]
    return documentsDirectory
}