ios - undefined symbol Swift.UnsafeMutableBufferPointer

Question

下载 Xcode 8 并迁移到 Swift 3 后，我无法再存档该项目。同时，项目构建没有任何问题。

我得到的错误:

Undefined symbols for architecture armv7:
"Swift.UnsafeMutableBufferPointer.(subscript.materializeForSet : (Swift.Int) -> A).(closure #1)", referenced from: function signature specialization of generic specialization with Swift.UnsafeMutableBufferPointer : Swift.MutableCollection in Swift and Swift.UnsafeMutableBufferPointer : Swift.RandomAccessCollection in Swift> of Swift._siftDown (inout A, index : A.Index, subRange : Swift.Range, by : inout (A.Iterator.Element, A.Iterator.Element) -> Swift.Bool) -> () in OrderCoordinator.o function signature specialization of generic specialization with Swift.UnsafeMutableBufferPointer : Swift.MutableCollection in Swift and Swift.UnsafeMutableBufferPointer : Swift.RandomAccessCollection in Swift> of Swift._heapSort (inout A, subRange : Swift.Range, by : inout (A.Iterator.Element, A.Iterator.Element) -> Swift.Bool) -> () in OrderCoordinator.o function signature specialization of generic specialization with Swift.UnsafeMutableBufferPointer : Swift.MutableCollection in Swift and Swift.UnsafeMutableBufferPointer : Swift.RandomAccessCollection in Swift> of Swift._partition (inout A, subRange : Swift.Range, by : inout (A.Iterator.Element, A.Iterator.Element) -> Swift.Bool) -> A.Index in OrderCoordinator.o ld: symbol(s) not found for architecture armv7 clang: error: linker command failed with exit code 1 (use -v to see invocation)

我能够通过在以下函数中注释数组排序代码来消除错误:

func didFinishWithResults(_ results: [PhotoProcessorResult]) {
    guard let album = albumService.currentAlbum else { return }
    //let sortedResults = results.sorted(by: { $0.fileIndex < $1.fileIndex })
    let updateItems = zip(sortedResults, album.assetItems).map { (photoProcessorResult, assetItem) -> UpdateItem in
        UpdateItem(path: photoProcessorResult.filePath, position: photoProcessorResult.fileIndex, isCover: assetItem.isCover)
    }
    albumService.updateAlbumWithItems(updateItems) { (success, errorDescription) in
        if success {
            self.handleAlbumUpdate()
        } else {
            self.showFailureAlert(errorDescription) {
                self.startProcessingAlbum(self.albumService.currentAlbum)
            }
        }
    }
}

虽然我通过使用 NSArray 对数据进行排序解决了问题，但我不喜欢这种解决方案。

如有任何建议，我们将不胜感激。

Answer 1

自编译以来，我认为您的代码没有任何问题。它显示“体系结构 armv7 的 undefined symbol ”并且无法存档这一事实告诉我您的项目正在发生某些事情，但不幸的是有很多方法会导致此问题。 arm7 是 iphone 5，所以您的项目可能只针对 arm64 正确设置。尝试此处提到的解决方案:Undefined symbols for architecture armv7