value stored to 'XX' is never read 要怎么改

我在加密用3DES算法，先上代码片段：

  CCCryptorStatus ccStatus; 
    uint8_t *bufferPtr = NULL; 
    size_t bufferPtrSize = 0; 
    size_t movedBytes = 0; 
    // uint8_t ivkCCBlockSize3DES; 
     
    bufferPtrSize = (plainTextBufferSize + kCCBlockSize3DES) & ~(kCCBlockSize3DES - 1); 
    bufferPtr = malloc( bufferPtrSize * sizeof(uint8_t)); 
    memset((void *)bufferPtr, 0x0, bufferPtrSize); 
    // memset((void *) iv, 0x0, (size_t) sizeof(iv)); 
     
    //    NSString *key = @"123456789012345678901234"; 
    NSString *initVec = @"init Vec"; 
    const void *vkey = (const void *) [key UTF8String]; 
    const void *vinitVec = (const void *) [initVec UTF8String]; 
     
    ccStatus = CCCrypt(encryptOrDecrypt, 
                       kCCAlgorithm3DES, 
                       kCCOptionPKCS7Padding|kCCOptionECBMode, 
                       vkey, //"123456789012345678901234", //key 
                       kCCKeySize3DES, 
                       vinitVec, //"init Vec", //iv, 
                       vplainText, //"Your Name", //plainText, 
                       plainTextBufferSize, 
                       (void *)bufferPtr, 
                       bufferPtrSize, 
                       &movedBytes); 

最后Analyze出现如下问题，value stored to 'ccStatus' is never read.
我试过将ccStatu打印出来就不会报错，但是这不能解决根本问题。
麻烦高手讲解！