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I think I've found a bug with focusable(_: onFocusChange:) on MacOS with SwiftUI and wanted to sanity check it here before using feedback assistant. This is with Xcode 11.3.1When I create the window, the VStack inside thinks it is in focus. But the onFocusChange closure never gets called to say it loses focus. As a result, both my VStacks in both my windows think they are infocus.Demonstration project at https://github.com/darrellroot/focusBug/Here's my ContentView which displays whether it thinks it is in focus:struct ContentView: View {
@State var inFocus = false
let windowCount: Int
var body: some View {
VStack {
Text("Focus Window \(windowCount)")
inFocus ? Text("This window thinks it is in focus") : Text("This window does not think it is in focus")
}.padding(50).focusable() { newFocus in
debugPrint("onFocusChange: \(newFocus)")
self.inFocus = newFocus
}
}
}Here's my appDelegate code which spawns 1 window on launch and 1 more every time a particular menu is selected: var windows: [Int:NSWindow] = [:]
var windowCount = 0
func applicationDidFinishLaunching(_ aNotification: Notification) {
newWindow()
}
@IBAction func newFocusWindow(_ sender: NSMenuItem) {
newWindow()
}
func newWindow() {
windowCount = windowCount + 1
let contentView = ContentView(windowCount: windowCount)
let window = NSWindow(
contentRect: NSRect(x: 100, y: 100, width: 1000, height: 1000),
styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
backing: .buffered, defer: false)
window.isReleasedWhenClosed = false
windows[windowCount] = window
window.title = "Focus Window \(self.windowCount)"
window.tabbingMode = .disallowed
window.center()
//window.setFrameAutosaveName("Window \(self.windowCount)")
window.contentView = NSHostingView(rootView: contentView)
window.makeKeyAndOrderFront(nil)
}DebugPrint output shows that onFocusChange got called once per window:2020-03-09 10:24:22.363001-0700 focusBug[2555:258395] Metal API Validation Enabled"onFocusChange: true""onFocusChange: true"
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droot.
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