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Modifying EXIF Data with Swift 3
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//: Playground - noun: a place where people can play | |
import UIKit | |
import ImageIO | |
import MobileCoreServices | |
let TEST_IMAGE: String = "replace.jpg" | |
let beach: UIImage = UIImage(named: TEST_IMAGE)! | |
let imageData: Data = UIImageJPEGRepresentation(beach, 1)! | |
let cgImgSource: CGImageSource = CGImageSourceCreateWithData(imageData as CFData, nil)! | |
let uti: CFString = CGImageSourceGetType(cgImgSource)! | |
let dataWithEXIF: NSMutableData = NSMutableData(data: imageData) | |
let destination: CGImageDestination = CGImageDestinationCreateWithData((dataWithEXIF as CFMutableData), uti, 1, nil)! | |
let imageProperties = CGImageSourceCopyPropertiesAtIndex(cgImgSource, 0, nil)! as NSDictionary | |
let mutable: NSMutableDictionary = imageProperties.mutableCopy() as! NSMutableDictionary | |
var EXIFDictionary: NSMutableDictionary = (mutable[kCGImagePropertyExifDictionary as String] as? NSMutableDictionary)! | |
print("before modification \(EXIFDictionary)") | |
EXIFDictionary[kCGImagePropertyExifUserComment as String] = "type:video" | |
mutable[kCGImagePropertyExifDictionary as String] = EXIFDictionary | |
CGImageDestinationAddImageFromSource(destination, cgImgSource, 0, (mutable as CFDictionary)) | |
CGImageDestinationFinalize(destination) | |
let testImage: CIImage = CIImage(data: dataWithEXIF as Data, options: nil)! | |
let newproperties: NSDictionary = testImage.properties as NSDictionary | |
print("after modification \(newproperties)") |
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