Swift - Create a GIF from Images and turn it into

问题:

This might be an amateur question, but although I have searched Stack Overflow extensibly, I haven't been able to get an answer for my specific problem.

I was successful in creating a GIF file from an array of images by following a Github example:

func createGIF(with images: [NSImage], name: NSURL, loopCount: Int = 0, frameDelay: Double) {

    let destinationURL = name
    let destinationGIF = CGImageDestinationCreateWithURL(destinationURL, kUTTypeGIF, images.count, nil)!

    // This dictionary controls the delay between frames
    // If you don't specify this, CGImage will apply a default delay
    let properties = [
        (kCGImagePropertyGIFDictionary as String): [(kCGImagePropertyGIFDelayTime as String): frameDelay]
    ]


    for img in images {
        // Convert an NSImage to CGImage, fitting within the specified rect
        let cgImage = img.CGImageForProposedRect(nil, context: nil, hints: nil)!

        // Add the frame to the GIF image
        CGImageDestinationAddImage(destinationGIF, cgImage, properties)
    }

    // Write the GIF file to disk
    CGImageDestinationFinalize(destinationGIF)
}

Now, I would like to turn the actual GIF into NSData so I can upload it to Firebase, and be able to retrieve it on another device.

To achieve my goal, I have two options: Either to find how to use the code above to extract the GIF created (which seems to directly be created when creating the file), or to use the images on the function's parameters to create a new GIF but keep it on NSData format.

Does anybody have any ideas on how to do this?

回答1:

Since nobody went ahead for over six months I will just put the answer from @Sachin Vas' comment here:

You can get the data using NSData(contentsOf: URL)