使用 Swift 2.2 ,我曾经像那样美化XML:
let detxTag = NSXMLElement(name: "detx")
let xml = NSXMLDocument(rootElement: detxTag)
// ...
let data = xml.XMLDataWithOptions(NSXMLNodePrettyPrint | NSXMLNodeCompactEmptyElement)
不幸的是,使用此代码不再使用 Swift 3 (由 Xcode 8 自动转换):
let detxTag = XMLElement(name: "detx")
let xml = XMLDocument(rootElement: detxTag)
// ...
let data = xml.xmlData(withOptions: NSXMLNodePrettyPrint)
它会产生以下错误:
Use of unresolved identifier 'NSXMLNodePrettyPrint'
似乎输入/输出选项已更改但不清楚如何使用它:https://developer.apple.com/reference/foundation/xmldocument/input_and_output_options
有什么想法吗?
答案 0 :(得分:8)
xmlData(withOptions:)
接受XMLNode.Options
,但必须是gem 'google_drive'
转换为Int
:
let data = xml.xmlData(withOptions: Int(XMLNode.Options.nodePrettyPrint.rawValue))
或多个选项:
let options: XMLNode.Options = [.nodePrettyPrint, .nodeCompactEmptyElement]
let data = xml.xmlData(withOptions: Int(options.rawValue))
从 Swift 4开始, xmlData(withOptions:)
需要XMLNode.Options
参数,所以这简化为
let data = xml.xmlData(options: .nodePrettyPrint)
单个选项,或
let data = xml.xmlData(options: [.nodePrettyPrint, .nodeCompactEmptyElement])
有多种选择。
答案 1 :(得分:1)
if let xml = try? XMLElement.init(xmlString:"<A><b>test</b><c>test</c></A>") {
let data = xmlDoc.xmlData(options:.nodePrettyPrint)
let str = String(data: data, encoding: .utf8)!
print(str)
}
//Output:
<A>
<b>test</b>
<c>test</c>
</A>
答案 2 :(得分:0)
那不是:
func prettyFormat(xmlString:String) -> String? {
do {
let xml = try XMLDocument.init(xmlString: xmlString)
let data = xml.xmlData(options: .nodePrettyPrint)
let str:String? = String(data: data, encoding: .utf8)
return str
}
catch {
print (error.localizedDescription)
}
return nil
}
用法:
var str = "Hello, XML Pretty Format playground"
let testStr:String? = "<A><b>test</b> <c>test</c><d>\(str)</d></A> "
let aStr = prettyFormat(xmlString: "<A><b>test</b> <c>test</c><d>\(str)</d></A> ")
print (aStr ?? "?")
let bStr = prettyFormat(xmlString:testStr!)
print (bStr ?? "?")
XMLElement.init无法正常工作... 请改善..