如何将[CUnsignedChar]或Array <uint8>转换为UnsafeMutablePointer <uint8>？

Question

如何从[CUnsignedChar]或Array转换为UnsafeMutablePointer？

我有CUnsignedChar形式的数据数组，但需要调用一个期望UnsafeMutablePointer的函数。

详细说明：

我试图在具有此签名的Swift的第三方框架中调用C函数：

  

int processData（unsigned char * data，int width，int height，int alpha，   int beta，void * handler，int * count，void ** results）;

我的Swift代码：

var width: Int32 = 0
var height: Int32 = 0
var length: Int32 = 1000

let count = UnsafeMutablePointer<Int32>.allocate(capacity: 1) 
let results: UnsafeMutablePointer<UnsafeMutableRawPointer?> = UnsafeMutablePointer.allocate(capacity: 1)

var data = [CUnsignedChar](repeating: 0, count: Int(length))
processData(&data, width, height, 25, 1000, self.handler, count, results)

当它遇到processData调用时我得到了EXC_BAD_ACCESS，但不确定调用中的哪个东西触发了这个。没有任何变量似乎有Swift抱怨的内存地址。