Unable to infer complex closure return type with SwiftUI

Question

Following part 3 of Apple\'s tutorial on SwiftUI, Handling User Input, I get this error:

Unable to infer complex closure return type; add explicit ty

Answer 1

For people getting this error on SwiftUI and looking for a way to debug their view stack

This error happens mainly when there is a compilation issue on one child View.

1 - Make sure your parent view can support multiple subviews (VStack, ZStack) and you have less than 10 subviews. Sometime you may want to add a Group wrapper.

2 - If this is not the problem, there is probably an issue with one subview. Try to isolate the one you suspect to have the issue. Usually I copy the subview into a property and a different error appears

var debug: some View {
        MyViewWithError(property: self.property)
}

Most of the time you'll encounter this because you pass the property (self.property) instead of a binding (self.$property)

Hope this can help some people