如何字节数组转换为base64字符串的iphone? [英] how to convert array of bytes to base64 String in iphone?
问题描述
我在VB一块code的。我需要转换的字节数组基地64串。以下是VB code。
如果arrLicence.Count> 0,
LicenceBytes = CTYPE(Array.CreateInstance(的GetType(字节),6),字节())
LicenceBytes(0)= Convert.ToByte(arrLicence(0)的ToString(),16)
LicenceBytes(1)= Convert.ToByte(arrLicence(1)的ToString(),16)
LicenceBytes(2)= Convert.ToByte(arrLicence(2)的ToString(),16)
LicenceBytes(3)= Convert.ToByte(arrLicence(3)的ToString(),16)
LicenceBytes(4)= Convert.ToByte(arrLicence(4)的ToString(),16)
LicenceBytes(5)= Convert.ToByte(arrLicence(5)的ToString(),16) LicenceString = Convert.ToBase64String(LicenceBytes)'6的字节数组 - 用户通过 - Base64En codeD
块引用>我需要它的iphone等价的。我试着用的NSData和皈依的base64但结果推迟。
我已经使用这个链接转换。
http://www.cocoadev.com/index.pl?BaseSixtyFour这是真的很紧急,需要尽快解决。我尝试用
的memcpy
创建单个字节,然后创建一个数组,但没有成功。我已经试过如下:
的NSData * D1 = [@64dataUsingEncoding:NSUTF16StringEncoding];
NSData的* D2 = [@37dataUsingEncoding:NSUTF16StringEncoding];
NSData的* D3 = [@81dataUsingEncoding:NSUTF16StringEncoding];
NSData的* D4 = [@D4dataUsingEncoding:NSUTF16StringEncoding];无符号字符*缓冲=(无符号字符*)malloc的(8);
缓冲器[0] = [D 1字节];
缓冲液[1] = [D2字节];
缓冲液[2] = [D3字节];
缓冲液[3] = [D4字节];NSData的*数据= [NSData的dataWithBytes:缓冲区长度:4];* NSString的海峡= [自我EN codeBase64WithData:数据]
免费(缓冲);这导致的
IJCgkA ==
而在.NET收益codeZDeB1A ==
的 请注意,转换是前四个字节arrLicence和输入为64,37,81,D4 的
解决方案// strBusi code = @64-37-81-d4-39-6d
NSArray的* tmp_arr = [strBusi code componentsSeparatedByString:@ - ];
NSMutableData * commandToSend = [[NSMutableData的alloc]初始化];
unsigned char型whole_byte;
CHAR byte_chars [3] = {'\\ 0','\\ 0','\\ 0'};
INT I;
对于(I = 0; I&下; [tmp_arr计数];我++){
byte_chars [0] = [[tmp_arr objectAtIndex:ⅰ] characterAtIndex:0];
byte_chars [1] = [[tmp_arr objectAtIndex:ⅰ] characterAtIndex:1];
whole_byte =与strtol(byte_chars,NULL,16);
[commandToSend对appendBytes:放大器; whole_byte长度:1];
}
返回commandToSend;这commandToSend然后被转换为base64数据。
I have a piece of code in vb. I need to convert array of bytes to base 64 string. Following is the vb code.
If arrLicence.Count > 0 Then
LicenceBytes = CType(Array.CreateInstance(GetType(Byte),6), Byte())
LicenceBytes(0) = Convert.ToByte(arrLicence(0).ToString(), 16) LicenceBytes(1) = Convert.ToByte(arrLicence(1).ToString(), 16) LicenceBytes(2) = Convert.ToByte(arrLicence(2).ToString(), 16) LicenceBytes(3) = Convert.ToByte(arrLicence(3).ToString(), 16) LicenceBytes(4) = Convert.ToByte(arrLicence(4).ToString(), 16) LicenceBytes(5) = Convert.ToByte(arrLicence(5).ToString(), 16) LicenceString = Convert.ToBase64String(LicenceBytes) '6 byteArray - passed by the user - Base64Encoded
I need its equivalent in iphone. I tried with NSData and base64 convertion but result defers.
I have used this link for conversion. http://www.cocoadev.com/index.pl?BaseSixtyFour
This is really urgent and need to solve asap. I tried by creating individual bytes using
memcpy
and then creating an array but with no success.What I have tried is as follows:
NSData *d1 =[@"64" dataUsingEncoding:NSUTF16StringEncoding]; NSData *d2 = [@"37" dataUsingEncoding:NSUTF16StringEncoding]; NSData *d3 = [@"81" dataUsingEncoding:NSUTF16StringEncoding]; NSData *d4 = [@"d4" dataUsingEncoding:NSUTF16StringEncoding]; unsigned char *buffer = (unsigned char*)malloc(8); buffer[0] = [d1 bytes] ; buffer[1] = [d2 bytes] ; buffer[2] = [d3 bytes] ; buffer[3] = [d4 bytes] ; NSData *data = [NSData dataWithBytes:buffer length:4]; NSString *str = [self encodeBase64WithData:data]; free(buffer);
This results in
IJCgkA==
while code in .NET returnsZDeB1A==
Please note that the conversion is for first four bytes of arrLicence and the input is 64, 37, 81, d4
解决方案//strBusiCode = @"64-37-81-d4-39-6d"; NSArray *tmp_arr = [strBusiCode componentsSeparatedByString:@"-"]; NSMutableData *commandToSend= [[NSMutableData alloc] init]; unsigned char whole_byte; char byte_chars[3] = {'\0','\0','\0'}; int i; for (i=0; i < [tmp_arr count]; i++) { byte_chars[0] = [[tmp_arr objectAtIndex:i] characterAtIndex:0]; byte_chars[1] = [[tmp_arr objectAtIndex:i] characterAtIndex:1]; whole_byte = strtol(byte_chars, NULL, 16); [commandToSend appendBytes:&whole_byte length:1]; } return commandToSend;
This commandToSend is then converted to base64 data.
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