iOS 14: Quick dive into the new UIColorWell
This looks like an ideal solution if you want to let user pick multiple colors.Published: July 4, 2020
While checking out the new
UIColorPickerViewController in iOS 14 I have noticed that there is also new control called
UIColorWell. I initially thought that this could be part of the color picker available separately but it is something very different.
UIColorPickerViewController so we don't have to. It either shows rainbow circle or the selected color with rainbow rim. When the user taps the color well it automatically opens instance of
UIColorPickerViewController and shows selected color if user has selected one.
We can also set the
supportsAlpha property to
false to allow only opaque colors. Same as with
That's introduction done. Let's go over usage.
UIColorWell does not play well with Interface Builder. It is not available in the objects library so you need plain
UIView and then set its class to
UIColorWell even then there is no preview. The control is roughly 25x25 points so set constraints accordingly 🙂
selectedColor property we can use to pre-select color or observe for changes. As Apple notes in the docs it supports KVO and also sends
valueChanged so to get notified of changes we can attach target like so:
colorWell.addTarget(self, action: #selector(colorWellChanged(_:)), for: .valueChanged)
And I believe that is all there is to
UIColorWell as of right now. It would be nice if it worked in Storyboards or could be triggered programatically (for example when user selects table view cell) but I did not find a way to do this. Tried the
sendActions(for: .touchUpInside) method but with no luck. If you know how, please let me know at @nemecek_f.
Uses: Xcode 12 & Swift 5.3