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我想使用波蘭民族字符Base64編碼。例如:Base64和utf8 /國家字符編碼
"zażółć gęślą jaźń"
應該是:
emEmIzM4MDvzJiMzMjI7JiMyNjM7IGcmIzI4MTsmIzM0NztsJiMyNjE7IGphJiMzNzg7JiMzMjQ7
但實施這一方案後:
-(NSString *)Base64Encode:(NSData *)data{
//Point to start of the data and set buffer sizes
int inLength = [data length];
int outLength = ((((inLength * 4)/3)/4)*4) + (((inLength * 4)/3)%4 ? 4 : 0);
const char *inputBuffer = [data bytes];
char *outputBuffer = malloc(outLength);
outputBuffer[outLength] = 0;
//64 digit code
static char Encode[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz/";
//start the count
int cycle = 0;
int inpos = 0;
int outpos = 0;
char temp;
//Pad the last to bytes, the outbuffer must always be a multiple of 4
outputBuffer[outLength-1] = '=';
outputBuffer[outLength-2] = '=';
while (inpos < inLength){
switch (cycle) {
case 0:
outputBuffer[outpos++] = Encode[(inputBuffer[inpos]&0xFC)>>2];
cycle = 1;
break;
case 1:
temp = (inputBuffer[inpos++]&0x03)<<4;
outputBuffer[outpos] = Encode[temp];
cycle = 2;
break;
case 2:
outputBuffer[outpos++] = Encode[temp|(inputBuffer[inpos]&0xF0)>> 4];
temp = (inputBuffer[inpos++]&0x0F)<<2;
outputBuffer[outpos] = Encode[temp];
cycle = 3;
break;
case 3:
outputBuffer[outpos++] = Encode[temp|(inputBuffer[inpos]&0xC0)>>6];
cycle = 4;
break;
case 4:
outputBuffer[outpos++] = Encode[inputBuffer[inpos++]&0x3f];
cycle = 0;
break;
default:
cycle = 0;
break;
}
}
NSString *pictemp = [NSString stringWithUTF8String:outputBuffer];
free(outputBuffer);
return pictemp;
}
當然
我得到的東西稍有不同:
emHFvMOzxYLEhyBnxJnFm2zEhSBqYcW6xYQ
女巫回到我身邊(bylinlin Ëdecoder):
zażółć gęślą jaźń
我打電話這種方式:
NSString* str= [email protected]"zażółć gęślą jaźń";
NSData* data=[str dataUsingEncoding:NSUTF8StringEncoding];
NSString * encodeString = [[[NSString alloc] init] autorelease];
encodeString = [self Base64Encode:data];
現在我再次看到,這可能是什麼區別。 :) – Wevah