I've been using the Zed editor for writing iOS and Mac apps for some time now, with great results. Here's how to do that: Build, run and debug iOS and Mac apps in Zed instead of Xcode (I really should have posted it here sooner).
Build and run performance is just as good as Xcode – there's no need to suffer through the slow builds you might have experienced with similar solutions. And you get code navigation, completion and other such quality of life stuff you'd expect.
Setup is fairly straightforward – the article takes you through it step by step. You need to install a couple of tools, one of which is xcede – a simpler way to build, run, debug and test Xcode apps from the command line – which I wrote for the purpose.
Hope people find this useful. If you've used other editors you'll realise that Xcode can often be... somewhat lacking.
(I've no affiliation or relationship with Zed by the way. I contributed basic runnable test support to the Swift plugin, but that's the extent of it.)