How to have buttons persist through views while maintaining same functionality

I'm just getting into ios development and I'm wondering how to accomplish this.

Say for example I have 3 screens - I want each of those screens to have the same 1 button that links to the same place whether you tap it on screen 1 2 or 3.

Is there a way to accomplish this without having a separate method for each view controller?

Also if a solution is too much to type out, are there any good references/guides I can look at for this?

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Edit: Another example in case it is a bit confusing - having a login button in the same position across 5 different screens that all take you to the same login screen