A way to change the return key on iOS keyboard?

[rnikander]

I know in UIKit how to do this. There is a property of UITextField called returnKeyType. But I'm wondering if something is exposed for me to do this from Rust? I tried grabbing the UIView out of the raw window handle and setting the returnKeyType, but the protocol method is optional and not implemented.

RawWindowHandle::UiKit(handle) => {
    let ui_view = handle.ui_view.as_ptr();
    let ui_view: Retained<UIView> = unsafe { Retained::from_raw(ui_view as *mut _).unwrap() };
    let proto: &ProtocolObject<dyn UITextInputTraits> = cast_protocol(&*ui_view).unwrap();
    unsafe { proto.setReturnKeyType(UIReturnKeyType::Done) };  // <- nope, crashes

[madsmtm]

Well, the reason this doesn't work is because our view is neither a UITextField nor UITextView.

There's been a bit of work on this in the past in #3571.

For now, I'd suggest you create such a view yourself, and insert it as a subview with ui_view.addSubview(&my_custom_text_view). This probably requires a bit of fiddling to get the input focus correct, you might have to also set it up so that it resizes to the parent view.