NSString urlEncode decode base64 encode decode

最新推荐文章于 2025-10-21 22:09:11 发布

原创最新推荐文章于 2025-10-21 22:09:11 发布 · 1.9k 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#input #byte #encoding #database #apple #null

本文介绍了一个Objective-C类库Utility，该类库提供了Base64编码与解码的功能，以及URL编码与解码的方法。通过这些方法可以方便地进行字符串的Base64和URL编码转换。

// // Utility.m // // // Created by apple on 10-7-23. // Copyright 2010 __MyCompanyName__. All rights reserved. // #import "Utility.h" //使用头文件 #import "base64.h" @implementation Utility + (NSString*)encodeBase64:(NSString*)input { size_t inputDataSize =[input lengthOfBytesUsingEncoding:NSUTF8StringEncoding]; Byte inputData[inputDataSize];//prepare a Byte[] [[input dataUsingEncoding:NSUTF8StringEncoding] getBytes:inputData];//get the pointer of the data size_t outputDataSize = EstimateBas64EncodedDataSize(inputDataSize);//calculate the encode data size Byte outputData[outputDataSize];//prepare a Byte[] for the encode data Base64EncodeData(inputData, inputDataSize, outputData, &outputDataSize,YES);//encode the data NSData * theData = [[NSData alloc] initWithBytes:outputData length:outputDataSize]; NSString *result = [[NSString alloc] initWithData:theData encoding:NSUTF8StringEncoding]; return result; } + (NSString*)decodeBase64:(NSString*)input { size_t inputDataSize =[input lengthOfBytesUsingEncoding:NSUTF8StringEncoding]; Byte inputData[inputDataSize];//prepare a Byte[] [[input dataUsingEncoding:NSUTF8StringEncoding] getBytes:inputData];//get the pointer of the data size_t outputDataSize = EstimateBas64DecodedDataSize(inputDataSize);//calculate the decode data size Byte outputData[outputDataSize];//prepare a Byte[] for the decode data Base64DecodeData(inputData, inputDataSize, outputData, &outputDataSize);//decode the data NSData * theData = [[NSData alloc] initWithBytes:outputData length:outputDataSize]; NSString *result = [[NSString alloc] initWithData:theData encoding:NSUTF8StringEncoding]; return result; } + (NSString*)URLEncodedString:(NSString*)input { NSString *result = (NSString *)CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault, (CFStringRef)input, NULL, CFSTR("!*'();:@&=+$,/?%#[]"), kCFStringEncodingUTF8); [result autorelease]; return result; } + (NSString*)URLDecodedString:(NSString*)input { NSString *result = (NSString *)CFURLCreateStringByReplacingPercentEscapesUsingEncoding(kCFAllocatorDefault, (CFStringRef)input, CFSTR(""), kCFStringEncodingUTF8); [result autorelease]; return result; } @end