我怎样才能将NSdata转换为十六进制字符串？ [英] How can i convert NSdata to hex string?

问题描述

我试着将NSData转换为十六进制字符串值的代码，但都是错误的？

这里result是我的NSdata

我需要一个十六进制字符串作为输出，但iam没有得到那个

  NSUInteger dataLength = [结果长度] ; 
 NSLog（@％d，dataLength）; 
 NSMutableString * string = [NSMutableString stringWithCapacity：dataLength * 2]; 
 const unsigned char * dataBytes = [结果字节]; 
 for（NSInteger idx = 0; idx< dataLength; ++ idx）{[string appendFormat：@％02x，dataBytes [idx]]; 
} 
 NSLog（@％@，string）; 
  

我该如何转换这个

更新：结果数据包含加密字符串。我希望将其转换为十六进制值。

解决方案

这是一个类别，这样做。这只是给你十六进制数据的所有字符。

  @implementation NSData（NSData_Conversion）
 
 #pragma mark  - 字符串转换
  - （NSString *）十六进制字符串
 {
 / *返回NSData的十六进制字符串。如果数据为空，则为空字符串。 * / 
 
 const unsigned char * dataBuffer =（const unsigned char *）[self bytes]; 
 
 if（！dataBuffer）
 {
 return [NSString string]; 
} 
 
 NSUInteger dataLength = [self length]; 
 NSMutableString * hexString = [NSMutableString stringWithCapacity：（dataLength * 2）]; 
 
 for（int i = 0; i< dataLength; ++ i）
 {
 [hexString appendFormat：@％02x，（unsigned int）dataBuffer [i ]]; 
} 
 
 return [NSString stringWithString：hexString]; 
} 
  

i tried following codes for converting a NSData to hex string values but all are wrong?

here "result" is my NSdata

i need a hex string as output but iam not getting that

NSUInteger dataLength = [result length];
  NSLog(@"%d",dataLength);
    NSMutableString *string = [NSMutableString stringWithCapacity:dataLength*2];
   const unsigned char *dataBytes = [result bytes];
    for (NSInteger idx = 0; idx < dataLength; ++idx) {        [string appendFormat:@"%02x", dataBytes[idx]];
 }    
    NSLog(@"%@",string);

how can i convert this please

UPDATES: the result data contains encrypted string .i want to convert this to hex values

解决方案

Here is a category that I have for doing this. This just gives you all the characters of the data in hex. No line break or anything.

@implementation NSData (NSData_Conversion)

#pragma mark - String Conversion
- (NSString *)hexadecimalString
{
    /* Returns hexadecimal string of NSData. Empty string if data is empty.   */

    const unsigned char *dataBuffer = (const unsigned char *)[self bytes];

    if (!dataBuffer)
    {
        return [NSString string];
    }

    NSUInteger          dataLength  = [self length];
    NSMutableString     *hexString  = [NSMutableString stringWithCapacity:(dataLength * 2)];

    for (int i = 0; i < dataLength; ++i)
    {
        [hexString appendFormat:@"%02x", (unsigned int)dataBuffer[i]];
    }

    return [NSString stringWithString:hexString];
}

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