objective-c 将字符转换为键盘码的代码

概述objective-c 将字符转换为键盘码的代码

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- (int)keyCodeForCharacter: (Nsstring*)character {    if(![character length]) return -1;    char code;    BOol shift,alt;    if(Ascii2Virtual( (char)[character characteratIndex: 0],shift,alt,code)) {        return code;    }    return -1;}BOol Ascii2Virtual(char pcar,BOol *pshift,BOol *palt,char *pkeycode){    KeyboardLayoutRef keyboard;    const voID *keyboardData; // keyboard layout data    UInt16 nbblocs;    char *modblocs,*blocs,*deadkeys;    int ix,ifin,numbloc,keycode;    BOol shift,alt;    // get the current keyboard    if(KLGetCurrentKeyboardLayout(&keyboard;)) return NO;    // get the description of the current keyboard layout    if(KLGetKeyboardLayoutProperty(keyboard,kKLKCHRData,&keyboardData;)) return NO;    // get pointer early numbers of blocks for each combination of modifIErs    modblocs = ((char *)keyboardData) + 2;    // get number of blocks keycode->ascii    nbblocs = *((UInt16 *)(keyboardData + 258));    // get pointer early blocks keycode-> ascii    blocs = ((char *)keyboardData) + 260;    // determining the size of all tables keycode-> ascii a scanner    ifin = nbblocs*128;    // determining pointer early in the tables of dead keys    deadkeys = blocs+ifin;    // Now it runs blocks keycode-> ascii to find the car ascii    for (ix=0; ix<ifin ; ix++)    {        if (blocs[ix]==pcar)        {            // found ascii value: Now we must determine which block it is            keycode = ix & 0×7f; // 0111 1111 mask            numbloc = ix >> 7;            break;        }    }    // not found: bail out (error)    if (ix >= ifin) return NO;    // from block number,we must find the combination of modifIErs using this block    for (ix=0; ix<15; ix++)    {        // it does not address whether the modifIErs are not "cAPItal" and "option"        if (ix&1 || ix&4) continue;        // Combining modifIErs found for the block        if (modblocs[ix]==numbloc)        {            shift = (ix&2) ? YES : NO;            alt   = (ix&8) ? YES : NO;            break;                }    }    // combination modifIErs not found: bail    if (ix>=15) return NO;    // save our parameters    *pkeycode=keycode;    *pshift=shift;    *palt=alt;    return YES;}

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