iphone-common-codes-ccteam源代码 CCNSData.m

// // CCNSData.m // CCFC // // Created by xichen on 11-12-17. // Copyright 2011年 ccteam. All rights reserved. // #import "CCNSData.h" @implementation NSData(cc) // 将UTF8格式的数据进行URL编码,返回编码后的总字节 - (int)URLEncode:(char *)dest len:(const int)destLen { int i; int j = 0; char ch; char *src = (char *)[self bytes]; for (i = 0; (i < [self length]) && (j < destLen); i++) { ch = src[i]; if ( ((ch >= 'A') && (ch <= 'Z')) || ((ch >= 'a') && (ch <= 'z')) || ((ch >= '0') && (ch <= '9'))) { dest[j++] = ch; // 普通ASCII字符 } else if(' ' == ch) { dest[j++] = '+'; } else { if (j + 3 < destLen) // 是中文 { sprintf(dest + j, "%%%02X", (unsigned char)ch); j += 3; } else // 出现保存空间不足的错误 { return 0; } } } dest[j] = '\0'; // char*字符串结尾符 return j; } // 打印每个字符 - (void)print { const unsigned char *bytes = (const unsigned char *)[self bytes]; for(int i = 0; i < [self length]; ++i) { printf("%#X ", bytes[i]); } } // 已指定字符个数为单位打印数据 - (void)printWithUint:(NSDATA_UNIT)unit { switch (unit) { case NSDATA_UNIT_ONE: { [self print]; } break; case NSDATA_UNIT_TWO: { const unsigned short *bytes = (const unsigned short *)[self bytes]; int unitCnt = [self length] / unit; int last = [self length] - unitCnt * unit; for(int i = 0; i < unitCnt; ++i) printf("%#X ", bytes[i]); if(last != 0) printf("%#X ", *(const unsigned char *)(bytes + unitCnt)); } break; case NSDATA_UNIT_FOUR: { const unsigned int *bytes = (const unsigned int *)[self bytes]; int unitCnt = [self length] / unit; int last = [self length] - unitCnt * unit; for(int i = 0; i < unitCnt; ++i) printf("%#X ", bytes[i]); for(int i = 0; i < last; ++i) printf("%#X ", *(const unsigned char *)(bytes + unitCnt + i)); } break; default: break; } } // returns the string that converts from the UTF8 encoding data - (NSString *)UTF8Str { return [[[NSString alloc] initWithData:self encoding:NSUTF8StringEncoding] autorelease]; } @end

可能有更新:

googlecode链接地址：http://code.google.com/p/iphone-common-codes-ccteam/source/browse/trunk/CCFC/files/CCNSData.m

github地址: https://github.com/cxsjabc/iphone-common-codes-ccteam/tree/master/CCFC/files/CCNSData.m