Swift xcode中的XML Document内存泄漏

Question

嗨，我是新手。我正在编写一个函数来将一些数据写入xml文档。

我在网上遇到内存泄漏。

xmlDoc.XMLDataWithOptions(Int(NSXMLNodePrettyPrint) | Int(NSXMLDocumentIncludeContentTypeDeclaration)) 

代码段如下。我认为xml对象存在写入文件的问题。当在仪器工具中看到指出上述线时。因为程序中的这种记忆在一段时间后不断增长。 ：

    func WriteToFile(FileName: String,
                 bIsOffline: BooleanType,
                 StartTime: String,
                 EndTime: String,
                 ToolName: String,
                 Url: String,
                 WinTitle: String,
                 WindowID: Int,
                 ExeName: String,
                 CmdLine: String,
                 PID: Int)
{
    let HostName = NSHost.currentHost().name as String!
    let HostNameBase64 = ConvertStrToBase64(HostName.lowercaseString)
    //    if (NSFileManager.defaultManager().fileExistsAtPath(FileName)) {
    var StatObj = NSFileManager.defaultManager().attributesOfItemAtPath(FileName, error: nil) as Dictionary!
    if (StatObj != nil) {
        let FileSize = StatObj["NSFileSize"] as NSNumber
        //var FileSize = FileSizeStr.toInt()
        var xmlDoc: NSXMLDocument!
        var RootNode: NSXMLElement
        if (FileSize.unsignedLongValue > 0) {
            let InputStr = NSURL.fileURLWithPath(FileName, isDirectory: false)
            xmlDoc = NSXMLDocument(contentsOfURL: InputStr!, options: Int(NSXMLDocumentTidyXML), error: nil)!
            RootNode = xmlDoc.rootElement() as NSXMLElement!
        } else {
            RootNode = NSXMLElement(name: "test")
            xmlDoc = NSXMLDocument(rootElement: RootNode)
            //            let Root = xmlDoc.rootElement()
            xmlDoc.characterEncoding = "UTF-8"
            xmlDoc.standalone = true
        }
            let WinInfoNode = NSXMLElement(name: "TEMP1")
            let TmpNode = NSXMLElement(name: "TEMP2", stringValue: StartTime)
            let TmpNode1 = NSXMLElement(name: "TEMP3", stringValue: EndTime)
            let TmpNode2 = NSXMLElement(name: "TEMP4", stringValue: HostNameBase64)
            WinInfoNode.addChild(TmpNode)
            WinInfoNode.addChild(TmpNode1)
            WinInfoNode.addChild(TmpNode2)
            RootNode.addChild(WinInfoNode)


        var DataToWrite: NSData = xmlDoc.XMLDataWithOptions(Int(NSXMLNodePrettyPrint) | Int(NSXMLDocumentIncludeContentTypeDeclaration))
        DataToWrite.writeToFile(FileName, atomically: true)
    }
    //    }
}

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