1.十进制转二进制
2.二进制转十进制
3.十进制转十六进制
4.十六进制转十进制
5.二进制转十六进制
6.十六进制转二进制
// 十进制转二进制
+(NSString*)toBinarySystemWithDecimalSystem:(NSString*)decimal
{
intnum=[decimal intValue];
intremainder=0;//余数
intdivisor=0;//除数
NSString*prepare=@"";
while(true)
{
remainder=num%2;
divisor=num/2;
num=divisor;
prepare=[prepare stringByAppendingFormat:@"%d",remainder];
if(divisor==0)
{
break;
}
}
NSString*result=@"";
for(inti=prepare.length-1;i>=0;i--)
{
result=[result stringByAppendingFormat:@"%@",
[prepare substringWithRange:NSMakeRange(i,1)]];
}
returnresult;
}
// 二进制转十进制
+(NSString*)toDecimalSystemWithBinarySystem:(NSString*)binary
{
intll=0;
inttemp=0;
for(inti=0;i
{
temp=[[binary substringWithRange:NSMakeRange(i,1)]intValue];
temp=temp*powf(2,binary.length-i-1);
ll+=temp;
}
NSString*result=[NSStringstringWithFormat:@"%d",ll];
returnresult;
}
//十进制转十六进制
NSString *hexString = [NSString stringWithFormat:@"%@",[[NSString alloc] initWithFormat:@"%1x",整形参数]];
//十六进制转十进制
UInt64 mac1 = strtoul([@"abcd1234" UTF8String], 0, 16);
//如果在有溢出，使用下面方法：
unsigned long long result = 0;
NSScanner *scanner = [NSScanner scannerWithString:@"abcd12345678"];
[scanner scanHexLongLong:&result];
//十六进制转二进制
-(NSString *)getBinaryByhex:(NSString *)hex
{
NSMutableDictionary *hexDic = [[NSMutableDictionary alloc] init];
hexDic = [[NSMutableDictionary alloc] initWithCapacity:16];
[hexDic setObject:@"0000" forKey:@"0"];
[hexDic setObject:@"0001" forKey:@"1"];
[hexDic setObject:@"0010" forKey:@"2"];
[hexDic setObject:@"0011" forKey:@"3"];
[hexDic setObject:@"0100" forKey:@"4"];
[hexDic setObject:@"0101" forKey:@"5"];
[hexDic setObject:@"0110" forKey:@"6"];
[hexDic setObject:@"0111" forKey:@"7"];
[hexDic setObject:@"1000" forKey:@"8"];
[hexDic setObject:@"1001" forKey:@"9"];
[hexDic setObject:@"1010" forKey:@"A"];
[hexDic setObject:@"1011" forKey:@"B"];
[hexDic setObject:@"1100" forKey:@"C"];
[hexDic setObject:@"1101" forKey:@"D"];
[hexDic setObject:@"1110" forKey:@"E"];
[hexDic setObject:@"1111" forKey:@"F"];
NSMutableString *binaryString=[[NSMutableString alloc] init];
for (int i=0; i<[hex length]; i++) {
NSRange rage;
rage.length = 1;
rage.location = i;
NSString *key = [hex substringWithRange:rage];
//NSLog(@"%@",[NSString stringWithFormat:@"%@",[hexDic objectForKey:key]]);
binaryString = [NSString stringWithFormat:@"%@%@",binaryString,[NSString stringWithFormat:@"%@",[hexDic objectForKey:key]]];
}
//NSLog(@"转化后的二进制为:%@",binaryString);
return binaryString;
}
//二进制转十六进制
- (NSString *)convertDataToHexStr:(NSData *)data {
if (!data || [data length] == 0) {
return @""; } NSMutableString *string = [[NSMutableString alloc] initWithCapacity:[data length]]; [data enumerateByteRangesUsingBlock:^(const void *bytes, NSRange byteRange, BOOL *stop) { unsigned char *dataBytes = (unsigned char*)bytes; for (NSInteger i = 0; i < byteRange.length; i++) { NSString *hexStr = [NSString stringWithFormat:@"%x", (dataBytes[i]) & 0xff]; if ([hexStr length] == 2) { [string appendString:hexStr]; } else { [string appendFormat:@"0%@", hexStr]; } } }];
return string;}
