-(int)ToHex:(NSString*)tmpid
{
int int_ch;
unichar hex_char1 = [tmpid
characterAtIndex:0];
////两位16进制数中的第一位(高位*16)
int int_ch1;
if(hex_char1 >= '0'&& hex_char1 <='9')
int_ch1 = (hex_char1-48)*16;
//// 0 的Ascll - 48
else if(hex_char1 >=
'A'&& hex_char1 <='F')
int_ch1 = (hex_char1-55)*16;
//// A 的Ascll - 65
else
int_ch1 = (hex_char1-87)*16;
//// a 的Ascll - 97
unichar hex_char2 = [tmpid
characterAtIndex:1];
///两位16进制数中的第二位(低位)
int int_ch2;
if(hex_char2 >= '0'&& hex_char2 <='9')
int_ch2 = (hex_char2-48);
//// 0 的Ascll - 48
else if(hex_char1 >=
'A'&& hex_char1 <='F')
int_ch2 = hex_char2-55;
//// A 的Ascll - 65
else
int_ch2 = hex_char2-87;
//// a 的Ascll - 97
int_ch = int_ch1+int_ch2;
NSLog(@"int_ch=%d",int_ch);
return int_ch;
}