Work-around for nonisolated PhotosPicker initializer in Xcode 16.0 RC

gross.swift

import PhotosUI
import SwiftUI

private final class SendableWrapper<T>: @unchecked Sendable {
    private var unsafeValue: T

    private let lock = NSLock()

    var value: T {
        get {
            lock.withLock { unsafeValue }
        }
        set {
            lock.withLock { unsafeValue = newValue }
        }
    }

    init(_ value: T) {
        unsafeValue = value
    }
}

extension PhotosPicker {
    /// Work around an issue with @MainActor isolated view initializers and extension methods from 3rd party libs
    /// not being compatible with PhotosPicker in Xcode 16.0 RC.
    init(
        videoSelection selection: Binding<PhotosPickerItem?>,
        label: @escaping @MainActor @Sendable () -> Label
    ) {
        // current encoding transcodes less frequently
        self.init(selection: selection, matching: .videos, preferredItemEncoding: .current, photoLibrary: .shared()) {
            MainActor.assumeIsolated {
                SendableWrapper(label())
            }.value
        }
    }
}