_objective-c 十进制转换成16进制

objective-c十进制到16进制的转换，代码如下；

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-(NSString *)ToHex:(long long int)tmpid

{

NSString *nLetterValue;

NSString *str =@"";

long long int ttmpig;

for (int i = 0; i<9; i++) {

ttmpig=tmpid%16;

tmpid=tmpid/16;

switch (ttmpig)

{

case 10:

nLetterValue =@"A";break;

case 11:

nLetterValue =@"B";break;

case 12:

nLetterValue =@"C";break;

case 13:

nLetterValue =@"D";break;

case 14:

nLetterValue =@"E";break;

case 15:

nLetterValue =@"F";break;

default:nLetterValue=[[NSString alloc]initWithFormat:@"%i",ttmpig];

}

str = [nLetterValue stringByAppendingString:str];

if (tmpid == 0) {

break;

}

}

return str;

}