如何将数组转换为 UnsafeMutablePointer Swift 3.0？

这是我在以前版本的 Swift 中的可行代码：

 let imageOptionsDictKeys = [ kCVPixelBufferPixelFormatTypeKey, kCVPixelBufferWidthKey,  kCVPixelBufferHeightKey, kCVPixelBufferOpenGLESCompatibilityKey, kCVPixelBufferIOSurfacePropertiesKey]
 let imageOptionsDictValues = [ cvPixelFormatType,  frameW, frameH, boolYES]

 var keyCallbacks = kCFTypeDictionaryKeyCallBacks
 var valueCallbacks = kCFTypeDictionaryValueCallBacks

 let imageOptions = CFDictionaryCreate(kCFAllocatorDefault, UnsafeMutablePointer(imageOptionsDictKeys), UnsafeMutablePointer(imageOptionsDictValues), 4, &keyCallbacks, &valueCallbacks)

Swift 3.0 发生变化后，我必须将键和值数组转换为UnsafeMutablePointer<UnsafeRawPointer?>用于创建 CFDictionary。

这边走：

    let imageOptionsDictKeysPointer =  UnsafeMutablePointer<UnsafeRawPointer?>.allocate(capacity: 1)
    imageOptionsDictKeysPointer.initialize(to: imageOptionsDictKeys)

给出错误访问错误。

阅读文档后，我尝试编译此代码：

        let imageOptionsDictKeys = [kCVPixelBufferPixelFormatTypeKey, kCVPixelBufferWidthKey,  kCVPixelBufferHeightKey, kCVPixelBufferOpenGLESCompatibilityKey]
        let imageOptionsDictKeysRawPointer = Unmanaged.passUnretained(imageOptionsDictKeys).toOpaque()
        let imageOptionsDictKeysPointer =  UnsafeMutablePointer<UnsafeRawPointer?>.allocate(capacity: 1)
        imageOptionsDictKeysPointer.initialize(to: imageOptionsDictKeysRawPointer)

        let imageOptionsDictValues = [ cvPixelFormatType,  frameW, frameH, boolYES]
        let imageOptionsDictValuesRawPointer = Unmanaged.passUnretained(imageOptionsDictValues).toOpaque()
        let imageOptionsDictValuesPointer =  UnsafeMutablePointer<UnsafeRawPointer?>.allocate(capacity: 1)
        imageOptionsDictValuesPointer.initialize(to: imageOptionsDictValuesRawPointer)

        let imageOptions = CFDictionaryCreate(kCFAllocatorDefault, imageOptionsDictKeysPointer, imageOptionsDictValuesPointer, 4, &keyCallbacks, &valueCallbacks)

但错误无法推断通用参数“实例”出现在行中非托管.passUnretained(array).toOpaque()

我现在不知道如何以编程方式创建 CFDictionary。

我刚刚解决了类似的问题，将数组转换为UnsafeMutablePointer< UnsafeMutablePointer<T>>您可以在这里找到：C 类型 float 的 Swift 3 UnsafeMutablePointer 初始化** https://stackoverflow.com/questions/40128275/swift-3-unsafemutablepointer-initialization-for-c-type-float/40135482#40135482

要使用相同的方案转换 swift 数组，请使用UnsafeMuTablePointer正如这里所建议的：http://technology.meronapps.com/2016/09/27/swift-3-0-unsafe-world-2/ http://technology.meronapps.com/2016/09/27/swift-3-0-unsafe-world-2/