How to save image

Question

I want to save image with userdefaults and use it in another view with this code but it shows an error .

UserDefaults.standard.set(img , forKey : \"simg\")
         


        

Answer 1

This is how I would do it. You have multiple places to save it to, the user's Documents folder is usually best:

func cacheImageAsPNG(image: UIImage, localID: String) {
    let userDocumentsURL = URL(fileURLWithPath: NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0])
    if let imageData = UIImagePNGRepresentation(image) {
        let filename = userDocumentsURL.appendingPathComponent("\(localID).png")

        if  FileManager.default.createFile(atPath: filename.path, contents: imageData, attributes: nil) {
            print("wrote file:\n\(filename.path)")
        } else {
            print("couldn't write the file:\n\(filename.path)")
        }
    }
}

if you want it erased by the system during times of peak memory usage, the cache directory is a better place:

 let cachesPath = NSSearchPathForDirectoriesInDomains(.cachesDirectory, .userDomainMask, true).last!

Edit: Retrieving the Image

func cachedImage(localID: String) -> UIImage? {
    let userDocumentsURL = URL(fileURLWithPath: NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0])
    let cachePath = userDocumentsURL.appendingPathComponent("\(localID).png")

    return UIImage(named: cachePath.path)
}