title: MailCore Errors IOS
body: <p>I try to use MailCore in my project, but I get these error:</p>
  
  <pre><code>Undefined symbols for architecture armv7:
    "_MailCoreEnableLogging", referenced from:
        -[ImapSync run] in ImapSync.o
    "_OBJC_CLASS_$_CTCoreMessage", referenced from:
        l_OBJC_$_CATEGORY_CTCoreMessage_$_CTCoreMessageBuisnessMail in CTCoreMessage+BuisnessMail.o
    "_OBJC_IVAR_$_CTCoreMessage.myFields", referenced from:
        -[CTCoreMessage(CTCoreMessageBuisnessMail) libetpanDateTime] in CTCoreMessage+BuisnessMail.o
        -[CTCoreMessage(CTCoreMessageBuisnessMail) senderDate] in CTCoreMessage+BuisnessMail.o
    "_OBJC_CLASS_$_CTCoreAccount", referenced from:
        objc-class-ref in AttachmentDownloader.o
        objc-class-ref in ImapSync.o
    "_MailCoreDisableLogging", referenced from:
        -[ImapSync run] in ImapSync.o
    "_IfTrue_RaiseException", referenced from:
        -[ImapFolderWorker fetchFrom:to:seqDelta:syncingNew:progressOffset:progressTotal:alreadySynced:] in ImapFolderWorker.o
  ld: symbol(s) not found for architecture armv7
  </code></pre>
  
  <p>but all of these methodes are there, I can see them in the MailCoreProject!</p>
  
  <p>I hope someone can help me!</p>