NSXMLParser：非ASCII字符的意外结果 [英] NSXMLParser: Unexpected result with non-ASCII characters

问题描述

我正在尝试通过REST Web服务以XML格式下载数据。
我已经用NSXMLParser创建了解析器并在TableView中可视化数据。

I'm trying to download data in XML format via a REST web services. I have already created the parser with NSXMLParser and visualize the data in a TableView.

当我遇到带有重音的XML文档句子时，我遇到了问题。

I have problems when I meet in the XML document sentences with the accent.

在一些研究中，我发现这个与我的问题非常相似并试图实现它：

Among some research I found this very similar to my problem and tried to implement it:

func parse(handler: () -> Void) {
    self.handler = handler
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) {
        self.countCategoryScheme = 0
        var url = NSURL(string: SomeStructure.firstLink);
        var err:NSError = NSError()
        var dataString: String = String(contentsOfURL: url!, encoding: NSUTF8StringEncoding, error: nil)!
        var data: NSData = dataString.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)!
        let parser = NSXMLParser(data: data)
        let resulset = NSString(data: data, encoding: NSUTF8StringEncoding)
        println(resulset)
        parser.delegate = self;
        parser.parse();
        if !parser.parse() {
            self.delegate?.XMLParserError(self, error: "I Parse Error")
            println("I Parser error")
        }
    }
}

in println（resulset） 我打印正确解码的整个XML文件。

in println (resulset) I print the entire XML file correctly decoded.

问题是当我运行解析器时，未读取带重音的字符

The problem is when I run the parser, the accented characters are not read

当我在解析器中找到字符时，这是代码：

This is code when i found Characters in the parser:

   func parser(parser: NSXMLParser!, foundCharacters string: String!) {
        myList[position] = string
    }

编辑：

这是我的文档示例：

<Name xml:lang="en" xmlns="">National Accounts</Name>

<Name xml:lang="it" xmlns="">Contabilità nazionale</Name>

在println（）中，如上所述正确打印文档。

In println () print the document correctly as described above.

相反，当我去保存找到carachter的数据时，如果它为我节省了这个：

Instead, when I go to save the data found carachter if "it" saves me this:

Contabilit

推荐答案

解析器：foundCharacters：委托方法可以被调用超过
一次单个XML元素。在你的例子中，它将被称为
一次使用Contabilit，一次使用ànazionale。

The parser:foundCharacters: delegate method can be called more than once for a single XML element. In your example, it would be called once with "Contabilit", and once with "à nazionale".

因此你必须连接
从 didStartElement 找到的字符串，直到 didEndElement 。

Therefore you have to concatenate the found strings from didStartElement until didEndElement.

这是一个非常简单的例子，说明如何做到这一点。当然，如果你有嵌套的XML元素，它会让
更复杂。

Here is a very simply example how this can be done. Of course it gets more complicated if you have nested XML elements.

为你的类添加当前元素字符串的属性：

Add a property for the current element string to your class:

var currentElement : String?

然后实现这样的委托方法：

And then implement the delegate methods like this:

func parser(parser: NSXMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [NSObject : AnyObject]) {

    // If a "Name" element started (which you are interested in), set
    // currentElement to an empty string, so that the found characters
    // can be collected. Otherwise set it to nil.
    if elementName == "Name" {
        currentElement = ""
    } else {
        currentElement = nil
    }

}

func parser(parser: NSXMLParser, didEndElement elementName: String, namespaceURI: String?, qualifiedName qName: String?) {

    // If the "Name" element ended, get the collected string and
    // append it to your list.
    if elementName == "Name" {
        if let name = currentElement {
            println(name)
            myList.append(name)
        }
    }
    currentElement = nil
}

func parser(parser: NSXMLParser, foundCharacters string: String?) {

    // If currentElement is not nil, append the found characters to it:
    currentElement? += string ?? ""
}

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