Object-c 普通字符串、二进制、十进制、十六进制之间的相互转换

素颜马尾好姑娘i 2022-06-16 07:24 439阅读 0赞

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。

  1. //
  2. //  NSStringConvertUtil.h
  3. //  TestSocket
  4. //
  5. //  Created by gj on 2017/4/27.
  6. //  Copyright © 2017年 juis. All rights reserved.
  7. //
  9. #import <Foundation/Foundation.h>
  11. @interface NSStringConvertUtil : NSObject
  13. //计算字节长度
  14. +(NSInteger) computeStringLength:(NSString *) string;
  16. //普通字符串转换为二进制。
  17. +(NSString *)StingToBinary:(NSString *)string;
  19. //二进制转字符串
  20. + (NSString *)BinaryToNSString:(NSData *)data;
  23. //普通字符串转换为十六进制。
  24. + (NSString *)hexStringFromString:(NSString *)string;
  26. // 十六进制转换为普通字符串。
  27. + (NSString *)convertHexStrToString:(NSString *)hexString;
  29. // 十六进制转二进制
  30. + (NSString *)getBinaryByhex:(NSString *)hex;
  32. // 二进制转十六进制
  33. + (NSString *)BinaryToHex:(NSData *)data;
  36. //十进制转十六进制
  37. + (NSString *)ToHex:(uint16_t)tmpid;
  39. //  十进制转二进制
  40. + (NSString *)toBinarySystemWithDecimalSystem:(NSString *)decimal;
  42. //  二进制转十进制
  43. + (NSString *)toDecimalSystemWithBinarySystem:(NSString *)binary;
  49. @end
  51. //
  52. //  NSStringConvertUtil.m
  53. //  TestSocket
  54. //
  55. //  Created by gj on 2017/4/27.
  56. //  Copyright © 2017年 juis. All rights reserved.
  57. //
  59. #import "NSStringConvertUtil.h"
  61. @implementation NSStringConvertUtil
  63. //计算字节长度
  64. +(NSInteger) computeStringLength:(NSString *)string{
  66.     NSInteger length = [string lengthOfBytesUsingEncoding:NSUTF8StringEncoding];
  67.     //    length -= (length - string.length) / 2;
  68.     //    length = (length +1) / 2;
  70.     return length;
  72. }
  75. //普通字符串转换为二进制。
  76. +(NSString *)StingToBinary:(NSString *)string{
  78.     NSData *myD = [string dataUsingEncoding:NSUTF8StringEncoding];
  79.     Byte *bytes = (Byte *)[myD bytes];
  80.     //下面是Byte 转换为16进制。
  81.     NSString *hexStr=@"";
  82.     for(int i=0;i<[myD length];i++)
  83.     {
  84.         NSString *newHexStr = [NSString stringWithFormat:@"%x",bytes[i]&0xff];///16进制数
  85.         if([newHexStr length]==1)
  86.             hexStr = [NSString stringWithFormat:@"%@0%@",hexStr,newHexStr];
  87.         else
  88.             hexStr = [NSString stringWithFormat:@"%@%@",hexStr,newHexStr];
  89.     }
  91.     return [self getBinaryByhex:hexStr];
  93. }
  96. //普通字符串转换为十六进制。
  97. + (NSString *)hexStringFromString:(NSString *)string{
  98.     NSData *myD = [string dataUsingEncoding:NSUTF8StringEncoding];
  99.     Byte *bytes = (Byte *)[myD bytes];
  100.     //下面是Byte 转换为16进制。
  101.     NSString *hexStr=@"";
  102.     for(int i=0;i<[myD length];i++)
  103.     {
  104.         NSString *newHexStr = [NSString stringWithFormat:@"%x",bytes[i]&0xff];///16进制数
  105.         if([newHexStr length]==1)
  106.             hexStr = [NSString stringWithFormat:@"%@0%@",hexStr,newHexStr];
  107.         else
  108.             hexStr = [NSString stringWithFormat:@"%@%@",hexStr,newHexStr];
  109.     }
  110.     return hexStr;
  111. }
  114. // 十六进制转换为普通字符串。
  115. + (NSString *)convertHexStrToString:(NSString *)hexString{
  116.     if (!hexString || [hexString length] == 0) {
  117.         return nil;
  118.     }
  119.     NSLog(@"line : %d, func: %s ",__LINE__, __func__);
  120.     char *myBuffer = (char *)malloc((int)[hexString length] / 2 + 1);
  121.     bzero(myBuffer, [hexString length] / 2 + 1);
  122.     for (int i = 0; i < [hexString length] - 1; i += 2) {
  123.         unsigned int anInt;
  124.         NSString * hexCharStr = [hexString substringWithRange:NSMakeRange(i, 2)];
  125.         NSScanner * scanner = [[[NSScanner alloc] initWithString:hexCharStr] init];
  126.         [scanner scanHexInt:&anInt];
  127.         myBuffer[i / 2] = (char)anInt;
  128.     }
  129.     NSString *unicodeString = [NSString stringWithCString:myBuffer encoding:4];
  130.     //NSLog(@"------字符串=======%@",unicodeString);
  131.     return unicodeString;
  132. }
  135. // 十六进制转二进制
  136. +(NSString *)getBinaryByhex:(NSString *)hex
  137. {
  138.     NSMutableDictionary  *hexDic = [[NSMutableDictionary alloc] init];
  139.     hexDic = [[NSMutableDictionary alloc] initWithCapacity:16];
  140.     [hexDic setObject:@"0000" forKey:@"0"];
  141.     [hexDic setObject:@"0001" forKey:@"1"];
  142.     [hexDic setObject:@"0010" forKey:@"2"];
  143.     [hexDic setObject:@"0011" forKey:@"3"];
  144.     [hexDic setObject:@"0100" forKey:@"4"];
  145.     [hexDic setObject:@"0101" forKey:@"5"];
  146.     [hexDic setObject:@"0110" forKey:@"6"];
  147.     [hexDic setObject:@"0111" forKey:@"7"];
  148.     [hexDic setObject:@"1000" forKey:@"8"];
  149.     [hexDic setObject:@"1001" forKey:@"9"];
  150.     [hexDic setObject:@"1010" forKey:@"A"];
  151.     [hexDic setObject:@"1011" forKey:@"B"];
  152.     [hexDic setObject:@"1100" forKey:@"C"];
  153.     [hexDic setObject:@"1101" forKey:@"D"];
  154.     [hexDic setObject:@"1110" forKey:@"E"];
  155.     [hexDic setObject:@"1111" forKey:@"F"];
  156.     [hexDic setObject:@"1010" forKey:@"a"];
  157.     [hexDic setObject:@"1011" forKey:@"b"];
  158.     [hexDic setObject:@"1100" forKey:@"c"];
  159.     [hexDic setObject:@"1101" forKey:@"d"];
  160.     [hexDic setObject:@"1110" forKey:@"e"];
  161.     [hexDic setObject:@"1111" forKey:@"f"];
  162.     NSMutableString *binaryString=[[NSMutableString alloc] init];
  164.     for (int i=0; i<[hex length]; i++) {
  165.         NSRange rage;
  166.         rage.length = 1;
  167.         rage.location = i;
  168.         NSString *key = [hex substringWithRange:rage];
  169.         binaryString = [NSMutableString stringWithFormat:@"%@%@",binaryString,[NSString stringWithFormat:@"%@",[hexDic objectForKey:key]]];
  170.     }
  171.     return binaryString;
  172. }
  175. //十进制转十六进制
  176. + (NSString *)ToHex:(uint16_t)tmpid
  177. {
  178.     NSString *nLetterValue;
  179.     NSString *str =@"";
  180.     uint16_t ttmpig;
  181.     for (int i = 0; i<9; i++) {
  182.         ttmpig=tmpid%16;
  183.         tmpid=tmpid/16;
  184.         switch (ttmpig)
  185.         {
  186.             case 10:
  187.                 nLetterValue =@"A";break;
  188.             case 11:
  189.                 nLetterValue =@"B";break;
  190.             case 12:
  191.                 nLetterValue =@"C";break;
  192.             case 13:
  193.                 nLetterValue =@"D";break;
  194.             case 14:
  195.                 nLetterValue =@"E";break;
  196.             case 15:
  197.                 nLetterValue =@"F";break;
  198.             default:
  199.                 nLetterValue = [NSString stringWithFormat:@"%u",ttmpig];
  200.         }
  201.         str = [nLetterValue stringByAppendingString:str];
  202.         if (tmpid == 0) {
  203.             break;
  204.         }
  205.     }
  206.     return str;
  207. }
  210. //  十进制转二进制
  211. + (NSString *)toBinarySystemWithDecimalSystem:(NSString *)decimal
  212. {
  213.     int num = [decimal intValue];
  214.     int remainder = 0;      //余数
  215.     int divisor = 0;        //除数
  217.     NSString * prepare = @"";
  219.     while (true)
  220.     {
  221.         remainder = num%2;
  222.         divisor = num/2;
  223.         num = divisor;
  224.         prepare = [prepare stringByAppendingFormat:@"%d",remainder];
  226.         if (divisor == 0)
  227.         {
  228.             break;
  229.         }
  230.     }
  232.     NSString * result = @"";
  233.     for (int i = prepare.length - 1; i >= 0; i --)
  234.     {
  235.         result = [result stringByAppendingFormat:@"%@",
  236.                   [prepare substringWithRange:NSMakeRange(i , 1)]];
  237.     }
  239.     return result;
  240. }
  241. //  二进制转十进制
  242. + (NSString *)toDecimalSystemWithBinarySystem:(NSString *)binary
  243. {
  244.     int ll = 0 ;
  245.     int  temp = 0 ;
  246.     for (int i = 0; i < binary.length; i ++)
  247.     {
  248.         temp = [[binary substringWithRange:NSMakeRange(i, 1)] intValue];
  249.         temp = temp * powf(2, binary.length - i - 1);
  250.         ll += temp;
  251.     }
  253.     NSString * result = [NSString stringWithFormat:@"%d",ll];
  255.     return result;
  256. }
  259. //二进制转十六进制
  260. + (NSString *)BinaryToHex:(NSData *)data {
  261.     if (!data) {
  262.         return nil;
  263.     }
  265.     NSString * binary=[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
  268.     NSMutableDictionary  *hexDic = [[NSMutableDictionary alloc] init];
  269.     hexDic = [[NSMutableDictionary alloc] initWithCapacity:16];
  270.     [hexDic setObject:@"0" forKey:@"0000"];
  271.     [hexDic setObject:@"1" forKey:@"0001"];
  272.     [hexDic setObject:@"2" forKey:@"0010"];
  273.     [hexDic setObject:@"3" forKey:@"0011"];
  274.     [hexDic setObject:@"4" forKey:@"0100"];
  275.     [hexDic setObject:@"5" forKey:@"0101"];
  276.     [hexDic setObject:@"6" forKey:@"0110"];
  277.     [hexDic setObject:@"7" forKey:@"0111"];
  278.     [hexDic setObject:@"8" forKey:@"1000"];
  279.     [hexDic setObject:@"9" forKey:@"1001"];
  280.     [hexDic setObject:@"A" forKey:@"1010"];
  281.     [hexDic setObject:@"B" forKey:@"1011"];
  282.     [hexDic setObject:@"C" forKey:@"1100"];
  283.     [hexDic setObject:@"D" forKey:@"1101"];
  284.     [hexDic setObject:@"E" forKey:@"1110"];
  285.     [hexDic setObject:@"F" forKey:@"1111"];
  287.     NSMutableString *hexString=[[NSMutableString alloc] init];
  289.     for (int i=0; i<[binary length]; i+=4) {
  290.         NSRange rage;
  291.         rage.length = 4;
  292.         rage.location = i;
  293.         NSString *key = [binary substringWithRange:rage];
  294.         hexString = [NSMutableString stringWithFormat:@"%@%@",hexString,[NSString stringWithFormat:@"%@",[hexDic objectForKey:key]]];
  295.     }
  297.     return hexString;
  298. }
  301. //二进制转字符串
  302. + (NSString *)BinaryToNSString:(NSData *)data {
  304.     NSString * str=[self BinaryToHex:data];
  306.     NSString *tmp=[self convertHexStrToString:str];
  308.     return tmp;
  309. }
  311. @end

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