How do I save a UIImage to a file?

Question

If I have a UIImage from an imagePicker, how can I save it to a subfolder in the documents directory?

Answer 1

In Swift 4:

// Create path.
let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
if let filePath = paths.first?.appendingPathComponent("MyImageName.png") {
    // Save image.
    do {
       try UIImagePNGRepresentation(image)?.write(to: filePath, options: .atomic)
    }
    catch {
       // Handle the error
    }
}

Answer 2

NSData *imageData = UIImagePNGRepresentation(image);
[imageData writeToFile:path atomically:YES];

where path is the name of the file you want to write it to.

Answer 3

In Swift 3:

// Create path.
let paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
let filePath = "\(paths[0])/MyImageName.png"

// Save image.
UIImagePNGRepresentation(image)?.writeToFile(filePath, atomically: true)