iOS中明文加密方式之base64加密

-(NSString *)base64Encode:(NSString *)str{
    //base64加密
    NSData*data = [str dataUsingEncoding:NSUTF8StringEncoding];
    NSData*base64Data = [data base64EncodedDataWithOptions:0];//Data加密
    NSString*base64Str = [data base64EncodedStringWithOptions:0];//NSString加密
    return base64Str;
}

-(NSString *)base64Decode:(NSString *)str{
    //base64解密
    NSData *data = [[NSData alloc]initWithBase64EncodedString:str options:0];
    NSString *decodeStr = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
    return decodeStr;
}
//注:字符串相同,Base64加密后的密文也是相同的