How To Change the On-Screen iOS Keyboard Theme


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I have been working on color theme support in my Code Notes For iOS application. Part of that requires that I change the on-screen keyboard theme to match the light / dark theme selection.

There is a complication, whilst you can set the keyboard theme different for a UITextField when it gets focus for editing, I want to do it globally across the application and without having a text field present at the time it is set.

To do this I set it on the UITextField class rather than any text field that might currently be on display.

So for the default light keyboard I use

UITextField.appearance().keyboardAppearance = .default

For the dark keyboard I use

UITextField.appearance().keyboardAppearance = .dark

There are several options, but these are the ones that meet my needs. Here is the complete list of built-in options.

.dark
.default
.light
.alert