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我尝试SomeAddOnName.MessengerCompose.filePathCurrent使用以下说明删除我知道他在 var 中的路径的特定附件:

    //Construct reference attachment
    var fileAttachmentBefore = Components.classes["@mozilla.org/file/local;1"].createInstance(Components.interfaces.nsIFile);
    fileAttachmentBefore.initWithPath(SomeAddOnName.MessengerCompose.filePathCurrent);
    var attachmentBefore = FileToAttachment(fileAttachmentBefore);
    //Remove attachment
    gMsgCompose.compFields.removeAttachment(attachmentBefore);

gMsgCompose.compFields.attachments但无论我在邮件作曲家做什么,它都不起作用并且仍然是空的。

有谁知道我必须做什么?

谢谢

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