Sheet content has stale `@State` values
| Originator: | darren.mo | ||
| Number: | rdar://FB13455221 | Date Originated: | 2023-12-07 |
| Status: | Open | Resolved: | |
| Product: | SwiftUI | Product Version: | iOS 17.2 RC Seed (21C62) |
| Classification: | Incorrect/Unexpected Behavior | Reproducible: | Always |
I have attached a sample project demonstrating the use of the `sheet(isPresented:content:)` modifier. The content closure reads an `@State` variable. However, the `@State` variable’s value is stale when the content closure is executed. This bug is likely related to the fact that the content closure is executed lazily, so a dependency on the `@State` variable is not set up. One workaround is for developers to use a closure capture list to capture the variable by value so that the `@State` variable is accessed during closure creation, correctly setting up the dependency. However, it is quite unfortunate for developers to have to know this. There must be a way that SwiftUI itself can fix this bug.
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