How to get the custom image name in a UIBarButtonItem button in Swift 3?

Question

I have this method in a custom class:

func changeImage(btn:UIBarButtonItem, imageName: String){
    btn.image = UIImage(named: imageName)
}

I would like write another method that can give me the same name passed in the 'imageName' parameter...something like:

func getImageName(btn:UIBarButtonItem) -> String{
    return btn.image.someVarOrMethodWithImageName
}

I try some of properties and subProperties like

    btn.image?.accessibilityIdentifier
    btn.image?.imageAsset.debugDescription
    btn.image?.imageAsset?.value(forKey: "named")

And others, but none of them are working.

Lot of thanks!

We do not have any possibility to directly access the imageName from UIImage/UIImageView. We could store it somewhere/get some reference. — Santosh, Sep 21 '16 at 14:53
Dup of http://stackoverflow.com/questions/10279314/how-to-get-image-name-used-in-an-uiimage — Santosh, Sep 21 '16 at 14:55
Is not dup, because this case is for Swift, and that case is for Obj-c :) — Gerson Montenegro, Sep 21 '16 at 15:39

score 0 · Accepted Answer · answered Sep 21 '16 at 15:02

Basically what you can do is subclass UIBarButtonItem and declare a property as var imageName: String? and when you assign the image to your UIBarButtonItem, assign this imageName with actual value. So that you can access it later anywhere(unless it is your custom 'UIBarButtonItem' class).

For example:

class MyBarButtonItem: UIBarButtonItem {
    var imageName: String?
}

//....
func changeImage(btn: MyBarButtonItem, imageName: String){
    btn.image = UIImage(named: imageName)
    btn.imageName = imageName
}

func getImageName(btn: MyBarButtonItem) -> String? {
    return btn.imageName
}

Thanks Santosh. Is a little frustrating to know that I can't take that property in a more clean way, but thank you so much :) — Gerson Montenegro, Sep 21 '16 at 15:42

How to get the custom image name in a UIBarButtonItem button in Swift 3?

1 Answers1