在与Socket通讯和蓝牙交互开发的过程中 涉及到各种数据类型的转换，这里写了一个转换类:
/*********************************************************************************
** 数据类型转换工具类 **
********************************************************************************/
#import
@interface DataCoverTool : NSObject
/** Hex 表示十六进制 **/
/**
* 将 NSString 字符串 转化为 16 进制字符串 @"abcde" --> @"0a1234 0b23454"
*/
+(NSString*)coverFromStringToHexStr:(NSString*)string;
/**
* 将 16 进制字符串 转化为 NString 字符串 @"0a1234 0b23454" -- > @"abcde"
*/
+(NSString*)coverFromHexStringToStr:(NSString*)hexStr;
/**
* 将 16 进制字符串 转化为 NSData 此处注意的是: 传入的字符串转为 128位 字符 不足位的补了数字 如果需要对应位 截取位置即可 @"0a1234 0b23454" -- > <0a1234 0b23454>
*/
+(NSData*)coverFromHexStrToData:(NSString*)hexStr;
/**
* 将字符串 转化为 对应的 ASCII 字符串
*/
+(NSString*)coverFromStringToAsciiStr:(NSString*)string;
/**
* 将字符串8个字符之后添加空格
*/
+(NSString *)stringAppendSpace:(NSString *)string;
/**
* 将 16 进制 NSData 转化为 NSString 字符串 <0a1234 0b23454> --> @"0a1234 0b23454"
*/
+(NSString*)coverFromHexDataToStr:(NSData*)hexData;
/**
* 将 NSString 转化为 NSData @"abcde" --> <0a1234 0b23454>
*/
+(NSData*)coverFromStringToHexData:(NSString*)string;
/**
* 将 NSData 转化为 16进制字符串 <0x00adcc asdfgwerf asdddffdfd> --> @"0x00adccasdfgwerfasdddffdfd"
*/
+(NSString*)coverFromDataToHexStr:(NSData*)data;
/**
* 将 byte 数组 -- > NSData Byte bytes[] --> <0a1234 0b23454>
*/
+(void)coverFromBytesArrToData;
/**
* 将 byte 数组 -- > 16 进制字符串 Byte bytes[] --> @"0a1234 0b23454"
*/
+(void)coverFromBytesArrToHexStr;
/**
* 16 进制字符串 -- > 10 进制数字 @"0F" --> 15 @"10" -- > 16
*/
+(UInt64)coverFromHexStrToInt:(NSString*)hexStr;
/**
* 10进制 --- > 16 进制字符串 15 ---> @"0F"
*/
+(NSString*)coverFromIntToHex:(NSInteger)tmpid;
/**
* 将 int 类型 --> NSData 4 个字节接收
*/
+(NSData *) setId:(int)Id;
/**
* NSData --> int 4 个字节接收表示
*/
+(int) setDa:(NSData*)intData;
/**
* 将时间戳 int ---> 4 个字节的 Data 数据
*/
+(NSData*) coverToByteWithData:(int)timeInterval;
@end
#import "DataCoverTool.h"
@implementation DataCoverTool
+(NSString*)coverFromStringToHexStr:(NSString*)string
{
NSString * hexStr = [NSString stringWithFormat:@"%@",
[NSData dataWithBytes:[string cStringUsingEncoding:NSUTF8StringEncoding]
length:strlen([string cStringUsingEncoding:NSUTF8StringEncoding])]];
for(NSString * toRemove in [NSArray arrayWithObjects:@"<", @">", nil])
hexStr = [hexStr stringByReplacingOccurrencesOfString:toRemove withString:@""];
return hexStr;
}
+(NSString*)coverFromHexStringToStr:(NSString*)hexStr
{
if (([hexStr length] % 2) != 0)
return nil;
NSMutableString *string = [NSMutableString string];
for (NSInteger i = 0; i < [hexStr length]; i += 2) {
NSString *hex = [hexStr substringWithRange:NSMakeRange(i, 2)];
NSInteger decimalValue = 0;
sscanf([hex UTF8String], "%x", &decimalValue);
[string appendFormat:@"%c", decimalValue];
}
return string;
}
// eg： NSString *hexString = @"3e435fab9c34891f"; //16进制字符串
+(NSData*)coverFromHexStrToData:(NSString*)hexString
{
int j=0;
Byte bytes[128]; ///3ds key的Byte 数组， 128位
for(int i=0;i<[hexString length];i++)
{
int int_ch; /// 两位16进制数转化后的10进制数
unichar hex_char1 = [hexString characterAtIndex:i]; ////两位16进制数中的第一位(高位*16)
int int_ch1;
if(hex_char1 >= '0' && hex_char1 <='9')
int_ch1 = (hex_char1-48)*16; //// 0 的Ascll - 48
else if(hex_char1 >= 'A' && hex_char1 <='F')
int_ch1 = (hex_char1-55)*16; //// A 的Ascll - 65
else
int_ch1 = (hex_char1-87)*16; //// a 的Ascll - 97
i++;
unichar hex_char2 = [hexString characterAtIndex:i]; ///两位16进制数中的第二位(低位)
int int_ch2;
if(hex_char2 >= '0' && hex_char2 <='9')
int_ch2 = (hex_char2-48); //// 0 的Ascll - 48
else if(hex_char1 >= 'A' && hex_char1 <='F')
int_ch2 = hex_char2-55; //// A 的Ascll - 65
else
int_ch2 = hex_char2-87; //// a 的Ascll - 97
int_ch = int_ch1+int_ch2;
NSLog(@"int_ch=%d",int_ch);
bytes[j] = int_ch; ///将转化后的数放入Byte数组里
j++;
}
return [[NSData alloc] initWithBytes:bytes length:128];
}
+(NSString*)coverFromStringToAsciiStr:(NSString*)string
{
NSString *str = @"123456789ABCDEFG";
const char *s = [str cStringUsingEncoding:NSASCIIStringEncoding];
size_t len = strlen(s);
NSMutableString *asciiCodes = [NSMutableString string];
for (int i = 0; i < len; i++) {
[asciiCodes appendFormat:@"%02x ", (int)s[i]];
}
return asciiCodes;
}
+(NSString *)stringAppendSpace:(NSString *)string
{
if(![string isEqualToString:@""])
{
NSMutableString *spaceString = [[NSMutableString alloc]init];
if(string.length > 8) //字符串个数大于8时
{
NSMutableArray *spaceIndexs = [NSMutableArray new];
for (int index = 0; index < string.length; index++) {
NSString *tmpStr = [string substringWithRange:NSMakeRange(index, 1)];
if ([tmpStr isEqualToString:@" "]) {
[spaceIndexs addObject:[NSNumber numberWithInt:index]];
}
}
int lastIndex = (int)[[spaceIndexs lastObject] integerValue]+1;
[spaceString appendString:[string substringWithRange:NSMakeRange(0, lastIndex)]];
NSMutableString *newStr =[NSMutableString stringWithString:[string substringFromIndex:lastIndex]];
if(newStr.length == 8)
{
[newStr appendString:@" "];
}
[spaceString appendString:newStr];
return spaceString;
}else if(string.length == 8){ //字符串个数为8时，添加空格
[spaceString appendString:string];
[spaceString appendString:@" "];
return spaceString;
}
}
return string;
}
+(NSString*)coverFromHexDataToStr:(NSData*)hexData
{
NSString* result;
const unsigned char* dataBuffer = (const unsigned char*)[hexData bytes];
if(!dataBuffer){
return nil;
}
NSUInteger dataLength = [hexData length];
NSMutableString* hexString = [NSMutableString stringWithCapacity:(dataLength * 2)];
for(int i = 0; i < dataLength; i++){
[hexString appendString:[NSString stringWithFormat:@"%02lx", (unsigned long)dataBuffer[i]]];
}
result = [NSString stringWithString:hexString];
return result;
}
+(NSData*)coverFromStringToHexData:(NSString*)string
{
return [string dataUsingEncoding: NSUTF8StringEncoding];
}
+(void)coverFromBytesArrToData
{
Byte byte[] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23};
NSData *adata = [[NSData alloc] initWithBytes:byte length:24];
NSLog(@"字节数组转换的data 数据为: %@",adata);
}
+(void)coverFromBytesArrToHexStr
{
NSString *aString = @"1234abcd";
NSData *aData = [aString dataUsingEncoding: NSUTF8StringEncoding];
// NSData* aData = [[NSData alloc] init];
Byte *bytes = (Byte *)[aData bytes];
/**
注: bytes 即为字节数组 类似于 Byte bts[] = {1,2,3,4,5};
**/
NSLog(@"%s",bytes);
NSString *hexStr=@"";
for(int i=0;i<[aData 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];
}
NSLog(@"bytes 的16进制数为:%@",hexStr);
NSLog(@"data 的16进制数为:%@",aData);
}
+(NSString*)coverFromDataToHexStr:(NSData *)data
{
const unsigned char* dataBuffer = (const unsigned char*)[data bytes];
NSUInteger dataLength = [data length];
NSMutableString* hexString = [NSMutableString stringWithCapacity:(dataLength * 2)];
for(int i = 0; i < dataLength; i++){
[hexString appendString:[NSString stringWithFormat:@"%02lx", (unsigned long)dataBuffer[i]]];
}
return [NSString stringWithString:hexString];
}
+(UInt64)coverFromHexStrToInt:(NSString *)hexStr
{
UInt64 mac1 = strtoul([hexStr UTF8String], 0, 16);
return mac1;
}
+(NSString *)coverFromIntToHex:(NSInteger)tmpid
{
NSString *nLetterValue;
NSString *str =@"";
long long int 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 alloc]initWithFormat:@"%lli",ttmpig];
}
str = [nLetterValue stringByAppendingString:str];
if (tmpid == 0) {
break;
}
}
if(str.length == 1){
return [NSString stringWithFormat:@"0%@",str];
}else{
return str;
}
}
+(NSData *) setId:(int)Id {
//用4个字节接收
Byte bytes[4];
bytes[0] = (Byte)(Id>>24);
bytes[1] = (Byte)(Id>>16);
bytes[2] = (Byte)(Id>>8);
bytes[3] = (Byte)(Id);
NSData *data = [NSData dataWithBytes:bytes length:4];
return data;
}
+(NSData*)coverToByteWithData:(int)timeInterval
{
char *p_time = (char *)&timeInterval;
char str_time[4] = {0};
for(int i= 0 ;i < 4 ;i++)
{
str_time[i] = *p_time;
p_time ++;
}
NSData* bodyData = [NSData dataWithBytes:str_time length:4];
return bodyData;
}
+(int) setDa:(NSData*)intData
{
int value = CFSwapInt32BigToHost(*(int*)([intData bytes]));//655650
return value;
}