Why extension to UIImage is not working?

Question

I'm following the tutorial here to display GIF image on UIImage. I have write the extension UIImage+GIF.swift which basically like this:

extension UIImage {

    public class func gifImage(named: String) -> UIImage {
        ...
    }
}

along with bunch other functions.

But when I tried to do this:

myImageView.image = UIImage.gifImage(named: "loading.gif");

Xcode complains type UIImage has no member "gifImage". Why? Any how can I fix this? Thanks.

EDIT:

I have also tried to make it a static function like this, but it still doesn't work:

extension UIImage {

    static func gifImage(named: String) -> UIImage {
        ...
    }
}

[http://stackoverflow.com/questions/27919620/how-to-load-gif-image-in-swift](http://stackoverflow.com/questions/27919620/how-to-load-gif-image-in-swift) — Nirav Hathi, Apr 13 '17 at 06:21
@NiravHathi thanks. I actually found the link in my question through this same QA. which led to the original issue here where I can't access static functions on this particular extension. — Chen Li Yong, Apr 13 '17 at 06:26

score 0 · Answer 1 · answered Apr 13 '17 at 05:35

0

import UIKit    
extension UIImage {
        func gifImage(named: String) -> UIImage {
            //Add your logic here
        }
    }

This should work.

answered Apr 13 '17 at 05:35

How if I want to add a "static" function? Function which I can call from `UIImage` class directly without instantiating it. – Chen Li Yong Apr 13 '17 at 06:00

Uma_Shanker_Tiwari · Answer 2 · 2017-04-13T06:06:24.110

0

Make your extenssion public

public extension UIImage {

public func gifImage(named: String) -> UIImage {
    ...
}
}

use extenssion like this

yourImageView.gifImage(named: "your image name")

edited Apr 13 '17 at 06:06

answered Apr 13 '17 at 06:00

I have added the `public` keyword to the `extension` but it still doesn't work... – Chen Li Yong Apr 13 '17 at 06:02
don't make it class function i have edited the answer pls check. – Uma_Shanker_Tiwari Apr 13 '17 at 06:07
hmm ok let me try it. I need to make modification to the functions though. – Chen Li Yong Apr 13 '17 at 06:16

2 Answers2