Ios Xcode 10 Swift生成错误：“0”；将非转义值转换为'；T'；可能会让它逃走”；

我使用的是Swift VectorBoolean库，它目前在Swift 3.2上，尚未更新为Swift 4.2，但应该仍然适用于Xcode 10。在Xcode 9上运行这个程序，效果很好。在Xcode 10上，它给出了一个我不确定如何修复的错误。这就是所讨论的功能：

typealias MyPathApplier = @convention(block) (UnsafePointer<CGPathElement>) -> Void
// Note: You must declare MyPathApplier as @convention(block), because
// if you don't, you get "fatal error: can't unsafeBitCast between
// types of different sizes" at runtime, on Mac OS X at least.

private func myPathApply(_ path: CGPath!, block: MyPathApplier) {
  let callback: @convention(c) (UnsafeMutableRawPointer, UnsafePointer<CGPathElement>) -> Void = { (info, element) in
    let block = unsafeBitCast(info, to: MyPathApplier.self)
    block(element)
  }

  path.apply(info: unsafeBitCast(block, to: UnsafeMutableRawPointer.self), function: unsafeBitCast(callback, to: CGPathApplierFunction.self))
}

我仍然不明白这里需要更改什么以确保它的构建，而且我们也没有遇到运行时错误。

使用

private func myPathApply(_ path: CGPath!, 
    block: @escaping @convention(block) (UnsafePointer<CGPathElement>) -> Void) {

}

private func mypathpapply（upath:CGPath！，
块：@escaping@convention（块）（UnsafePointer）->Void）{
}

---

@noescape

现在默认为

这允许它进行编译，但现在我面临一个运行时错误。为问题增加了细节。

private func myPathApply(_ path: CGPath!, 
    block: @escaping @convention(block) (UnsafePointer<CGPathElement>) -> Void) {

}