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 07:24 362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。

//
    //  NSStringConvertUtil.h
    //  TestSocket
    //
    //  Created by gj on 2017/4/27.
    //  Copyright © 2017年 juis. All rights reserved.
    //
    
    #import <Foundation/Foundation.h>
    
    @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