Right aligning a .bottomBar ToolbarItem in SwiftUI for iOS 14 - xcode

Question

I'd like to add a "compose" button onto the .bottomBar of a .toolbar in my NavigationView.
Adding a Spacer() simply almost center aligns the item:
struct HomeView: View {
var body: some View {
NavigationView {
Text("Hello, World!")
.navigationTitle("Hello, World!")
.toolbar {
ToolbarItem(placement: .bottomBar) {
HStack {
Spacer()
Button(action: { print("Pressed") }) {
Image(systemName: "plus.circle.fill")
.imageScale(.large)
.font(.title)
}
}
}
}
}
}
}
This produces the following:
Not what I would have expected. What's even stranger is that that's not exactly center aligned, it's off by a few pixels.
So how do I:
Right align?
Center align?
Thanks

Answer 1

I had this same problem, here's what I found (Xcode 12.0 Beta 6)
Right Aligned
One way to do this is to use two .bottomBar items.
.toolbar(content: {
ToolbarItem(placement: .bottomBar) {
Spacer()
}
ToolbarItem(placement: .bottomBar) {
Button(action: {}) {
Text("Add List")
}
}
})
A bit cleaner is to use a ToolbarItemGroup with a Spacer().
.toolbar(content: {
ToolbarItemGroup(placement: .bottomBar) {
Spacer()
Button(action: {}) {
Text("Add List")
}
}
})
Centered
To center an item you can use .status as the placement.
.toolbar(content: {
ToolbarItem(placement: .status) {
Button(action: {}) {
Text("Add List")
}
}
})

Answer 2

Every ToolbarItem have to include single view, so just move Spacer into separated toolbar item
Tested with Xcode 12b3
.toolbar {
ToolbarItem(placement: .bottomBar) {
Spacer()
}
ToolbarItem(placement: .bottomBar) {
Button(action: { print("Pressed") }) {
Image(systemName: "plus.circle.fill")
.imageScale(.large)
.font(.title)
}
}
}
Note: to have it centered remove toolbar item with spacer