The 7 SwiftUI Mistakes I See Every Junior Developer Make (And How to Fix Them)

I've reviewed hundreds of SwiftUI projects. The same mistakes keep showing up — and they're not the ones you'd expect. These aren't syntax errors. They're architectural decisions that seem fine at first but create real pain as your app grows. Mistake #1: Putting Everything in the View This is the most common one. Views that are 300+ lines with networking calls, state management, data transformation, and UI all mixed together. The problem: struct ProfileView : View { @State private var user : User ? @State private var isLoading = false @State private var posts : [ Post ] = [] @State private var error : String ? var body : some View { VStack { // 200 lines of UI code mixed with logic } . onAppear { Task { isLoading = true let url = URL ( string : "https://api.example.com/user" ) ! let ( data , _ ) = try await URLSession . shared . data ( from : url ) user = try JSONDecoder () . decode ( User . self , from : data ) // ... more networking code } } } } The fix: Use MVVM. Your View should on