How to upload image that was taken from UIImagePickerController

Question

After user choose image from the iPhone library with UIImagePickerController, I want to upload it to my server using ASIHTTPRequest library.

Answer 1

The easiest way I found is

Step 1: Get path for DocumentsDirectory

func fileInDocumentsDirectory(filename: String) -> String {
    let documentsFolderPath = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)[0] as NSString
    return documentsFolderPath.appendingPathComponent(filename)
}

Step 2: Save at the path with tempFileName

 func saveImage(image: UIImage, path: String ) {
    let pngImageData = UIImagePNGRepresentation(image)

    do {
        try pngImageData?.write(to: URL(fileURLWithPath: path), options: .atomic)
    } catch {
        print(error)
    }
}

Step 3: Usage in imagePickerController function

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]){

    if var image = info[UIImagePickerControllerOriginalImage] as? UIImage {// image asset

    self.saveImage(image: image, path: fileInDocumentsDirectory(filename: "temp_dummy_image.png"))

}

Step 4 : To get the image when required

get the reference like this

let localfilepath = self.fileInDocumentsDirectory(filename: "temp_dummy_image.png")

Step 5: After using the image, to trash the temp image

func removeTempDummyImagefileInDocumentsDirectory(filename: String) {

    let fileManager = FileManager.default
    let documentsUrl =  FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first! as NSURL
    let documentsPath = documentsUrl.path

    do {
        if let documentPath = documentsPath
        {
            let fileNames = try fileManager.contentsOfDirectory(atPath: "\(documentPath)")
            print("all files in cache: \(fileNames)")
            for fileName in fileNames {

                if (fileName.hasSuffix(".png"))
                {
                    let filePathName = "\(documentPath)/\(fileName)"
                    try fileManager.removeItem(atPath: filePathName)
                }
            }

            let files = try fileManager.contentsOfDirectory(atPath: "\(documentPath)")
            print("all files in cache after deleting images: \(files)")
        }

    } catch {
        print("Could not clear temp folder: \(error)")
    }

}