如何将CVPixelBufferGetBaseAddress调用转换为Swift？

Question

也许我是第一个在Swift中这样做的人，但在网上似乎没有任何内容使用＆amp; / inout和swint中的uint8_t。有人可以翻译吗？这种关系是否按位？

目标-C

uint8_t *buf=(uint8_t *) CVPixelBufferGetBaseAddress(cvimgRef);

快速尝试

let inout buf:uint8_t = SOMETHING HERE CVPixelBufferGetBaseAddress(cvimgRef)

Answer 1

CVPixelBufferGetBaseAddress()返回UnsafeMutablePointer<Void>， 可以通过

转换为UInt8指针

let buf = UnsafeMutablePointer<UInt8>(CVPixelBufferGetBaseAddress(pixelBuffer))

更新Swift 3（Xcode 8）：

if let baseAddress = CVPixelBufferGetBaseAddress(pixelBuffer) {
    let buf = baseAddress.assumingMemoryBound(to: UInt8.self)
    // `buf` is `UnsafeMutablePointer<UInt8>`
} else {
    // `baseAddress` is `nil`
}