How to convert code objective c to Swift to save image?

Question

I have seen this code in other post, for save pictures:

  // Create path.
 NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,      NSU         


        

Answer 1

Use this category to save any image on document directory

import Foundation
import UIKit
import ImageIO
import MobileCoreServices

extension UIImage {
    func writeAtPath(path:String) -> Bool {

        let result = CGImageWriteToFile(self.CGImage!, filePath: path)
        return result
    }

    private func CGImageWriteToFile(image:CGImageRef, filePath:String) -> Bool {
        let imageURL:CFURLRef = NSURL(fileURLWithPath: filePath)
        var destination:CGImageDestinationRef? = nil

        let ext = (filePath as NSString).pathExtension.uppercaseString

        if ext == "JPG" || ext == "JPEG" {
            destination = CGImageDestinationCreateWithURL(imageURL, kUTTypeJPEG, 1, nil)
        } else if ext == "PNG" || ext == "PNGF" {
            destination = CGImageDestinationCreateWithURL(imageURL, kUTTypePNG, 1, nil)
        } else if ext == "TIFF" || ext == "TIF" {
            destination = CGImageDestinationCreateWithURL(imageURL, kUTTypeTIFF, 1, nil)
        } else if ext == "GIFF" || ext == "GIF" {
            destination = CGImageDestinationCreateWithURL(imageURL, kUTTypeGIF, 1, nil)
        } else if ext == "PICT" || ext == "PIC" || ext == "PCT" || ext == "X-PICT" || ext == "X-MACPICT" {
            destination = CGImageDestinationCreateWithURL(imageURL, kUTTypePICT, 1, nil)
        } else if ext == "JP2" {
            destination = CGImageDestinationCreateWithURL(imageURL, kUTTypeJPEG2000, 1, nil)
        } else  if ext == "QTIF" || ext == "QIF" {
            destination = CGImageDestinationCreateWithURL(imageURL, kUTTypeQuickTimeImage, 1, nil)
        } else  if ext == "ICNS" {
            destination = CGImageDestinationCreateWithURL(imageURL, kUTTypeAppleICNS, 1, nil)
        } else  if ext == "BMPF" || ext == "BMP" {
            destination = CGImageDestinationCreateWithURL(imageURL, kUTTypeBMP, 1, nil)
        } else  if ext == "ICO" {
            destination = CGImageDestinationCreateWithURL(imageURL, kUTTypeICO, 1, nil)
        } else {
            fatalError("Did not find any matching path extension to store the image")
        }

        if (destination == nil) {
            fatalError("Did not find any matching path extension to store the image")
            return false
        } else {
            CGImageDestinationAddImage(destination!, image, nil)

            if CGImageDestinationFinalize(destination!) {
                return false
            }
            return true
        }
    }
}

// This is how to use this category in your application.

func testImageWrite() -> Bool {

    let img = UIImage(named: "test")

    var path = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)[0]
    path = (path as NSString).stringByAppendingPathComponent("Test.png")

    let result = img?.writeAtPath(path)

    return result!
}