Scenario A SwiftUI view has an overlay with alignment: .top, the content uses .alignmentGuide(.top) {} to adjust the placement. Issue When the content of the overlay is in an if-block, the alignment guide is not adjusted. Example code The example shows 2 views. Not working example, where the content is an if-block. Working example, where the content is not in an if-block Screenshot: https://github.com/simonnickel/FB15248296-SwiftUIAlignmentGuideInOverlayConditional/blob/main/screenshot.png Tested on - Xcode Version 16.0 RC (16A242) on iOS 18.0 Code // Not working .overlay(alignment: .top) { if true { // This line causes .alignmentGuide() to fail Text("Test") .alignmentGuide(.top, computeValue: { dimension in dimension[.bottom] }) } } // Working .overlay(alignment: .top) { Text("Test") .alignmentGuide(.top, computeValue: { dimension in dimension[.bottom] }) } Also created a Feedback: FB15248296 Example Project is here: https://github.com/simonnickel/FB15248296-SwiftUIAlignmentGuideInOverlayConditional/tree/main

My current workflow to have a Swift Package with a Demo is like this: PackageFolder > DemoFolder I have a package, with a Demo folder inside. I can open the Demo project and Drag&Drop the local PackageFolder to override the remote dependency with the local one. This allows to edit the package while inside the demo project. With Xcode 16 this does no longer work because Xcode does not allow to drop an ancestor of the file path where the project is located. Xcode does not tell this while you drop, it just does not allow it. But it tells you thats the reason, when you try to add the local package as a dependency to the project: "The selected package cannot be a direct ancestor of the project.". (Dropping other local packages still works, see: https://forums.developer.apple.com/forums/thread/756824) What is the expected way to handle a package with a demo project with Xcode 16?