objective-c实现authCode 解决php与ios通信加密的问题 代码

#import <Foundation/Foundation.h> typedef enum { NSStringAuthCodeEncoded, NSStringAuthCodeDecoded } NSStringAuthCode; @interface NSString (Base64) - (NSString *)authCode:(NSString *)auth_key operation:(NSStringAuthCode)operation encoding:(NSStringEncoding)encoding; - (NSString *)authCodeEncoded:(NSString *)key encoding:(NSStringEncoding)encoding; - (NSString *)authCodeEncoded:(NSString *)key; - (NSString *)authCodeDecoded:(NSString *)key encoding:(NSStringEncoding)encoding; - (NSString *)authCodeDecoded:(NSString *)key; @end