Object-c 普通字符串、二进制、十进制、十六进制之间的相互转换
废话不说了，直接看代码，这个是在IOS开发中（objc）普通字符串与二进制、十进制、十六进制之间的相互转换，下面的方法能满足大部分场景，不满足的，可以参考转换一下即可，希望对大家有点帮助。
//
// NSStringConvertUtil.h
// TestSocket
//
// Created by gj on 2017/4/27.
// Copyright © 2017年 juis. All rights reserved.
//
import
@interface NSStringConvertUtil : NSObject
//计算字节长度
+(NSInteger) computeStringLength:(NSString *) string;
//普通字符串转换为二进制。
+(NSString *)StingToBinary:(NSString *)string;
//二进制转字符串
- (NSString *)BinaryToNSString:(NSData *)data;
//普通字符串转换为十六进制。
- (NSString *)hexStringFromString:(NSString *)string;
// 十六进制转换为普通字符串。
- (NSString *)convertHexStrToString:(NSString *)hexString;
// 十六进制转二进制
- (NSString *)getBinaryByhex:(NSString *)hex;
// 二进制转十六进制
- (NSString *)BinaryToHex:(NSData *)data;
//十进制转十六进制
- (NSString *)ToHex:(uint16_t)tmpid;
// 十进制转二进制
- (NSString *)toBinarySystemWithDecimalSystem:(NSString *)decimal;
// 二进制转十进制
- (NSString *)toDecimalSystemWithBinarySystem:(NSString *)binary;
@end
//
// NSStringConvertUtil.m
// TestSocket
//
// Created by gj on 2017/4/27.
// Copyright © 2017年 juis. All rights reserved.
//
import "NSStringConvertUtil.h"
@implementation NSStringConvertUtil
//计算字节长度
+(NSInteger) computeStringLength:(NSString *)string{
NSInteger length = [string lengthOfBytesUsingEncoding:NSUTF8StringEncoding];
// length -= (length - string.length) / 2;
// length = (length +1) / 2;
return length;
}
//普通字符串转换为二进制。
+(NSString *)StingToBinary:(NSString *)string{
NSData *myD = [string dataUsingEncoding:NSUTF8StringEncoding];
Byte *bytes = (Byte *)[myD bytes];
//下面是Byte 转换为16进制。
NSString *hexStr=@"";
for(int i=0;i<[myD length];i++)
{
NSString *newHexStr = [NSString stringWithFormat:@"%x",bytes[i]&0xff];///16进制数
if([newHexStr length]==1)
hexStr = [NSString stringWithFormat:@"%@0%@",hexStr,newHexStr];
else
hexStr = [NSString stringWithFormat:@"%@%@",hexStr,newHexStr];
}
return [self getBinaryByhex:hexStr];
}
//普通字符串转换为十六进制。
- (NSString *)hexStringFromString:(NSString *)string{
NSData *myD = [string dataUsingEncoding:NSUTF8StringEncoding];
Byte *bytes = (Byte *)[myD bytes];
//下面是Byte 转换为16进制。
NSString *hexStr=@"";
for(int i=0;i<[myD length];i++)
{
NSString *newHexStr = [NSString stringWithFormat:@"%x",bytes[i]&0xff];///16进制数
if([newHexStr length]==1)
hexStr = [NSString stringWithFormat:@"%@0%@",hexStr,newHexStr];
else
hexStr = [NSString stringWithFormat:@"%@%@",hexStr,newHexStr];
}
return hexStr;
}
// 十六进制转换为普通字符串。
- (NSString *)convertHexStrToString:(NSString *)hexString{
if (!hexString || [hexString length] == 0) {
return nil;
}
NSLog(@"line : %d, func: %s ",LINE, func);
char *myBuffer = (char *)malloc((int)[hexString length] / 2 + 1);
bzero(myBuffer, [hexString length] / 2 + 1);
for (int i = 0; i < [hexString length] - 1; i += 2) {
unsigned int anInt;
NSString * hexCharStr = [hexString substringWithRange:NSMakeRange(i, 2)];
NSScanner * scanner = [[[NSScanner alloc] initWithString:hexCharStr] init];
[scanner scanHexInt:&anInt];
myBuffer[i / 2] = (char)anInt;
}
NSString *unicodeString = [NSString stringWithCString:myBuffer encoding:4];
//NSLog(@"------字符串=======%@",unicodeString);
return unicodeString;
}
// 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"];
[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];
binaryString = [NSMutableString stringWithFormat:@"%@%@",binaryString,[NSString stringWithFormat:@"%@",[hexDic objectForKey:key]]];
}
return binaryString;
}
//十进制转十六进制
- (NSString *)ToHex:(uint16_t)tmpid
{
NSString *nLetterValue;
NSString *str =@"";
uint16_t 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 stringWithFormat:@"%u",ttmpig];
}
str = [nLetterValue stringByAppendingString:str];
if (tmpid == 0) {
break;
}
}
return str;
}
// 十进制转二进制
-
(NSString *)toBinarySystemWithDecimalSystem:(NSString *)decimal
{
int num = [decimal intValue];
int remainder = 0; //余数
int divisor = 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 (int i = prepare.length - 1; i >= 0; i --)
{
result = [result stringByAppendingFormat:@"%@",
[prepare substringWithRange:NSMakeRange(i , 1)]];
}return result;
}
// 二进制转十进制 -
(NSString *)toDecimalSystemWithBinarySystem:(NSString *)binary
{
int ll = 0 ;
int temp = 0 ;
for (int i = 0; i < binary.length; i ++)
{
temp = [[binary substringWithRange:NSMakeRange(i, 1)] intValue];
temp = temp * powf(2, binary.length - i - 1);
ll += temp;
}NSString * result = [NSString stringWithFormat:@"%d",ll];
return result;
}
//二进制转十六进制
-
(NSString *)BinaryToHex:(NSData *)data {
if (!data) {
return nil;
}NSString * binary=[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
NSMutableDictionary *hexDic = [[NSMutableDictionary alloc] init];
hexDic = [[NSMutableDictionary alloc] initWithCapacity:16];
[hexDic setObject:@"0" forKey:@"0000"];
[hexDic setObject:@"1" forKey:@"0001"];
[hexDic setObject:@"2" forKey:@"0010"];
[hexDic setObject:@"3" forKey:@"0011"];
[hexDic setObject:@"4" forKey:@"0100"];
[hexDic setObject:@"5" forKey:@"0101"];
[hexDic setObject:@"6" forKey:@"0110"];
[hexDic setObject:@"7" forKey:@"0111"];
[hexDic setObject:@"8" forKey:@"1000"];
[hexDic setObject:@"9" forKey:@"1001"];
[hexDic setObject:@"A" forKey:@"1010"];
[hexDic setObject:@"B" forKey:@"1011"];
[hexDic setObject:@"C" forKey:@"1100"];
[hexDic setObject:@"D" forKey:@"1101"];
[hexDic setObject:@"E" forKey:@"1110"];
[hexDic setObject:@"F" forKey:@"1111"];
NSMutableString *hexString=[[NSMutableString alloc] init];
for (int i=0; i<[binary length]; i+=4) {
NSRange rage;
rage.length = 4;
rage.location = i;
NSString *key = [binary substringWithRange:rage];
hexString = [NSMutableString stringWithFormat:@"%@%@",hexString,[NSString stringWithFormat:@"%@",[hexDic objectForKey:key]]];
}
return hexString;
}
//二进制转字符串
-
(NSString *)BinaryToNSString:(NSData *)data {
NSString * str=[self BinaryToHex:data];
NSString *tmp=[self convertHexStrToString:str];
return tmp;
}
@end