在IOS7中的DDASLLogger在真實設備上不記錄

Question

在ipod5的IOS7中使用Lumberjack，我向DDLog添加了DDASLLogger，並記錄了一些內容。並使用「asl_search」獲取日誌，但什麼都沒有。當我在ios7 iphone模擬器上完成時，我得到了我完全記錄的內容。這是DDASLLogger的錯誤嗎？

Answer 1

我終於找到答案了：是的。這是一個記錄到「asl_search only finds messages with ReadUID set」的錯誤。發送給ASL時，我們需要爲消息設置ReadUID屬性。否則，asl_search無法找到它。

在DDASLLogger發送消息的代碼如下：

- (void)logMessage:(DDLogMessage *)logMessage 
{ 
    NSString *logMsg = logMessage->logMsg; 

    if (formatter) 
    { 
     logMsg = [formatter formatLogMessage:logMessage]; 
    } 

    if (logMsg) 
    { 
     const char *msg = [logMsg UTF8String]; 

     int aslLogLevel; 
     switch (logMessage->logFlag) 
     { 
      // Note: By default ASL will filter anything above level 5 (Notice). 
      // So our mappings shouldn't go above that level. 

      case LOG_FLAG_ERROR : aslLogLevel = ASL_LEVEL_ALERT; break; 
      case LOG_FLAG_WARN : aslLogLevel = ASL_LEVEL_CRIT; break; 
      case LOG_FLAG_INFO : aslLogLevel = ASL_LEVEL_ERR;  break; 
      case LOG_FLAG_DEBUG : aslLogLevel = ASL_LEVEL_WARNING; break; 
      default    : aslLogLevel = ASL_LEVEL_NOTICE; break; 
     } 

     asl_log(client, NULL, aslLogLevel, "%s", msg); 
    } 
} 

我們只需要改變

 asl_log(client, NULL, aslLogLevel, "%s", msg); 

到

 aslmsg m = asl_new(ASL_TYPE_MSG); 
     asl_set(m, ASL_KEY_READ_UID, "501"); 
     asl_log(client, m, aslLogLevel, "%s", msg); 

它的工作原理。謝謝。