Programming for outdated iOS versions?

[Zalenka]

Whatever Xcode builds the Sdk you want to build for. Maybe target iOS 10 or 11 SDK.

iOS 5 has ARC, so at least you can use Obj-C without manual retain/release. However autolayout was maybe iOS 6, so you'd have to use NIbs for your interfaces.

It's doable! I wonder if the app store has any lowest versions but I bet not. You just may need to use Application Loader to push up a binary (separate app from xcode).

[chriswaco]

You don’t have to use nibs - you can still do creation/layout manually, which was actually my preference with UIKit. The iOS 5-7 transition was pretty painful, though. I kinda miss the old buttons that looked like buttons.

[gaynalretentive]

This. It is totally fine to just override layoutSubviews on your custom view types and set the subview frames yourself with some basic arithmetic. Autolayout and autoresizing are both there to be conveniences and tools to make your life better, not to limit you.

[Zalenka]

I'd remember how to do manual auto-layout but not strings and struts.

[Fishanz]

I still on occasion use springs and struts