Long titles move buttons out of page

[ElderLars]

I have a problem on ios with this custom renderer. When the titles is too long it pushes the buttons out of screen. I would like to have the title truncated instead but cannot find a way to handle that.
We have the title left aligned and we only use the renderer for iOS.
I have tried to find a way to measure the buttons but the widths is allways showing zero for me.
Do you have an idea for a solution or can you hint me were to look?
Thank you for helping.