swift warm up xmlelement

Transcript

1. Swift ఔࣜখ೤਎ XMLElement John Lin
2. XMLElement • XML จ݅ཫతҰݸ Node, Լ໘ՄҎ༗ߋଟత Node
3. XML • ௕త኷૾ HTML ɼෆաੋ፤ိଘࢿྉత • ࠷ۙᔒॄኄਓ༻ • େՈ౎վ༻ json ྃ
4. XML ߏ଄ • <aaa>
 <bbb xxx="yyy">
 ccc
 </bbb>
 </aaa>
5. XMLNode • ॴ༗ XML ૬᮫త݁ߏ౎ੋṜݸ class త subclass • ՄҎ㗞ੜ֤छ subclass • ༗ Document, element, attribute, text, comment, namespace, dtd ౳౳
6. Nodes • Document: ୅ද੔ݸจ݅ɼ။༗Ұݸ root element • Text: Ұஈจࣈ • attribute: Element తಛੑ • comment: Ḽղ • ଖଞɿ࿨ᱛᨽ༗᮫(DTD)
7. 㗞ੜXML • <aaa>
 <bbb xxx="yyy">
 ccc
 </bbb>
 </aaa> var aaa = XMLElement(name: "aaa") var bbb = XMLElement(name: "bbb", stringValue: "ccc") aaa.addChild(bbb) bbb.setAttributesWith(["xxx": "yyy"])
8. ኺXML Ꮣ੒ String • ୞ཁݺڣ String(describing:) print(String(describing: aaa)) <aaa><bbb xxx="yyy">ccc</bbb></aaa>
9. XMLParser • Delegate based streaming parser. • Delegate based => ෆ။௚઀ࠂૌ㟬݁Ռɼ୞။ࠂૌ 㟬ଞ۰౸ྃॄኄ • streaming parser => ෆधཁᩇ౸࠷ޙҰݸࣈ࠽။༗ ݁Ռ • ؆ᄸိ㘸बੋ኷೉༻
10. ࢼ༻ XMLParser let xmlText = """ <swift> <is cool=\"true\"> the best </is> </swift> """ let data = xmlText.data(using: .utf8) let parser = XMLParser(data: data!)
11. ࢼ༻ XMLParser @objc class Reader : NSObject, XMLParserDelegate { func parserDidStartDocument(_ parser: XMLParser) { print("doc started") } func parser(_ parser: XMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String] = [:]) { print("got elem \(elementName) with attr \ (attributeDict)") } func parser(_ parser: XMLParser, foundCharacters string: String) { print("got value \(string)") } }
12. ࢼ༻ XMLParser let delegate = Reader() parser.delegate = delegate parser.parse() output: doc started got elem swift with attr [:] got value got elem is with attr ["cool": "true"] got value the best got value
13. Plist • Plist ༗ࡾछ ASCII, XML, Binary • Plist ࢧԉ Codable !!
14. PropertyListEncoder PropertyListDecoder • ࢧԉ Encode & Decode • ՄҎ༻ Codable
15. ᫚ग़XML Plist struct People : Codable { let name : String let foods : [String] } let john = People(name: "john", foods: ["pudin", "cake"]) let encoder = PropertyListEncoder() encoder.outputFormat = .xml let encoded = try? encoder.encode(john) print(String(data: encoded!, encoding: .utf8)!) •
16. ᫚ग़XML Plist <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>foods</key> <array> <string>pudin</string> <string>cake</string> </array> <key>name</key> <string>john</string> </dict> </plist> •
17. ࣗగ᫚ग़త Key struct People : Codable { let name : String let foods : [String] enum CodingKeys: String, CodingKey { case name = "full_name" case foods } }
18. ࣗగ᫚ग़త Key <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http:// www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>foods</key> <array> <string>pudin</string> <string>cake</string> </array> <key>full_name</key> <string>john</string> </dict> </plist>
19. ኺ Plist ᫚ճ object let decoder = PropertyListDecoder() let another_john = try? decoder.decode(People.self, from: encoded!) • ။ࣗಈ൑Ꮧ plist ֨ࣜɼ࠶᫚੒ data
20. ݁࿦ • XMLElement ᕝ೉༻త • ཁଘ䈕త࿩ؐੋ༻ Codable ഑ JSON/Plist 㠧
21. Q&A
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