OC中将十进制数字转为三十二进制方法

最近项目中对未登录用户昵称命名规则使用到了这一需求，之前没遇到到过，在网上找了下发现基本都是Java和C#或者C的，不过有十进制转十六进制的，所以拿来参考了下，直接写了个分类以供有需要的人参考或直接使用就行，代码如下：

.h

+ (NSString *)ToHex:(long long)convert;

.m

+ (NSString *)ToHex:(long long)convert

{

NSString * ruleValue;

NSString * string = @"";

long long temp;

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

{

temp = convert%32;

convert = convert/32;

switch (temp)

{

case 10:

ruleValue =@"A";break;

case 11:

ruleValue =@"B";break;

case 12:

ruleValue =@"C";break;

case 13:

ruleValue =@"D";break;

case 14:

ruleValue =@"E";break;

case 15:

ruleValue =@"F";break;

case 16:

ruleValue =@"G";break;

case 17:

ruleValue =@"H";break;

case 18:

ruleValue =@"I";break;

case 19:

ruleValue =@"J";break;

case 20:

ruleValue =@"K";break;

case 21:

ruleValue =@"L";break;

case 22:

ruleValue =@"M";break;

case 23:

ruleValue =@"N";break;

case 24:

ruleValue =@"O";break;

case 25:

ruleValue =@"P";break;

case 26:

ruleValue =@"Q";break;

case 27:

ruleValue =@"R";break;

case 28:

ruleValue =@"S";break;

case 29:

ruleValue =@"T";break;

case 30:

ruleValue =@"U";break;

case 31:

ruleValue =@"V";break;

default:

ruleValue = [NSString stringWithFormat:@"%lld",temp];

}

string = [ruleValue stringByAppendingString:string];

if (convert == 0)

{

break;

}

}

return string;

}