相关疑难解决方法(0)

在调用以下代码时,尝试将"self"传递给swift中的C函数:

var callbackStruct : AURenderCallbackStruct = 
    AURenderCallbackStruct.init(
      inputProc: recordingCallback,
      inputProcRefCon: UnsafeMutablePointer<Void>
    )

在这里将"self"转换为UnsafeMutablePointer类型的理想方法是什么？

我知道其他人也问了类似的问题,但我还没有看到明确的答案,我仍然被困住了.我正在尝试编写一个Swift函数,它接受硬件生成的键盘扫描代码,例如来自NSEvent,并返回密钥的alpha-caps-locked名称,用于特定的键排列(Dvorak,Qwerty等). )当前在OS中有效(可能与生成代码时生效的安排不同).

我的理解是,这样做的唯一方法就是调用一些非常古老的Carbon功能,避开Swift的极端类型安全性,这是我感觉不舒服的事情.这是The Show So Far:

import  Cocoa
import  Carbon

func keyName (scanCode: UInt16) -> String?
  { let maxNameLength = 4,      modifierKeys: UInt32 = 0x00000004   //  Caps Lock (Carbon Era)

    let deadKeys      = UnsafeMutablePointer<UInt32>(bitPattern: 0x00000000),
        nameBuffer    = UnsafeMutablePointer<UniChar>.alloc(maxNameLength),
        nameLength    = UnsafeMutablePointer<Int>.alloc(1),
        keyboardType  = UInt32(LMGetKbdType())

    let source        = TISGetInputSourceProperty ( TISCopyCurrentKeyboardLayoutInputSource()
                                                        .takeRetainedValue(),
                                                    kTISPropertyUnicodeKeyLayoutData )

    let dataRef       = unsafeBitCast(source, CFDataRef.self)
    let dataBuffer    = CFDataGetBytePtr(dataRef)

    let keyboardLayout  = unsafeBitCast(dataBuffer, UnsafePointer <UCKeyboardLayout>.self)

    let osStatus  = UCKeyTranslate  (keyboardLayout, scanCode, UInt16(kUCKeyActionDown),
                        modifierKeys, keyboardType, UInt32(kUCKeyTranslateNoDeadKeysMask),
                        deadKeys, maxNameLength, …