base64加密 (iOS)

#import <Foundation/Foundation.h>
@interface NSString (Base64)
/**
 *  转换为Base64编码
 */
 - (NSString *)base64EncodedString;
 /**
 *  将Base64编码还原
 */
 - (NSString *)base64DecodedString;
 @end

#import "NSString+Base64.h"
@implementation NSString (Base64)

- (NSString *)base64EncodedString;
{
NSData *data = [self dataUsingEncoding:NSUTF8StringEncoding];
return [data base64EncodedStringWithOptions:0];
}

- (NSString *)base64DecodedString
{
NSData *data = [[NSData alloc]initWithBase64EncodedString:self options:0];
return [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
}

@end

调用

NSString *codeString = @"Hello";
NSLog(@"原文---%@",codeString);

NSString *base64Str = [codeString base64EncodedString];
NSLog(@"Base64编码---%@",base64Str);

NSString *decodeStr = [base64Str base64DecodedString];
NSLog(@"Base64解码---%@",decodeStr);