Swift对象转为C指针

最新推荐文章于 2022-04-12 18:00:00 发布

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最新推荐文章于 2022-04-12 18:00:00 发布

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文章标签： swift

原文链接：https://juejin.im/post/5a30dedd51882559e225a575

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class Bridge {
  // 前两个是使用__bridge
  class func bridge<T: AnyObject>(obj: T) -> UnsafePointer<Void> {
    return UnsafePointer(Unmanaged.passUnretained(obj).toOpaque())
  }

  class func bridge<T: AnyObject>(ptr: UnsafePointer<Void>) -> T {
    return Unmanaged<T>.fromOpaque(COpaquePointer(ptr)).takeUnretainedValue()
  }

  // 后两个是__bridge_transfer
  class func bridgeRetained<T : AnyObject>(obj : T) -> UnsafePointer<Void> {
    return UnsafePointer(Unmanaged.passRetained(obj).toOpaque())
  }

  class func bridgeTransfer<T : AnyObject>(ptr : UnsafePointer<Void>) -> T {
    return Unmanaged<T>.fromOpaque(COpaquePointer(ptr)).takeRetainedValue()
  }
}

// 转UnsafeMutablePointer的话
UnsafeMutablePointer(Unmanaged.passUnretained(self).toOpaque())
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