Swift开发：创建XML文件，包含节点，属性值

－－－－－－－－－－－－－－－XmlWrite.swift－－－－－－－－－－－－－－－－－

//
//  XmlWrite.swift
//  CreateXmlFile
//
//  Created by 黄涛 on 16/5/25.
//  Copyright ? 2016年 黄涛. All rights reserved.
//

import UIKit


class XmlWrite: NSObject {
    
    fileprivate let xmlHead = "<?xml version='1.0' encoding='UTF-8' standalone='yes' ?>"
    fileprivate var dirPath = ""
    fileprivate var fileName = ""
    fileprivate var filePath = ""
    fileprivate var root = "";
    init(dir: String,fileName: String,root:String) {
        super.init()
        self.dirPath = dir
        self.fileName = fileName
        self.filePath = dirPath + self.fileName
        self.root = root;
        items = [];
    }
    
    var items:[Item]?;
     
    func saveXml() {
            
            let data = NSMutableData()//可变数据
            
            // xml 文件声明
            data.append("(xmlHead)n<(root)>n".data(using: String.Encoding.utf8,allowLossyConversion: true)!)
            
            // 遍历 item  第一层
            for i in 0..<items!.count  {
                
                if items![i].attributes != nil {
                    
                    // 获取item 属性string
                    let itemStr:String? = ItemToString(items![i])
                    // 添加item属性
                    data.append("  (itemStr!)n".data(using: String.Encoding.utf8,allowLossyConversion: true)!)
                    
                }
                
                // 当前item 的node集合
                let nodes = items![i].nodes;
                
                for j in 0..<nodes!.count {
                    //获取node 属性string
                    let node = (nodes?[j])!;
                    // 判断当前节点的子节点
                    let isSub = node.subNode?.count > 0 ? true : false;
                    
                    let nodeStr:String? = NodeToString(node,isSub: isSub);
                    // print(nodeStr)
                    // 添加node属性
                    data.append("    (nodeStr!)n".data(using: String.Encoding.utf8,allowLossyConversion: true)!)
                   
                    if node.subNode?.count > 0
                    {
                        for k in 0..<node.subNode!.count
                        {
                            //获取node 属性string
                            let snode = node.subNode?[k];
                            let snodeStr:String? = NodeToString(snode!,isSub: false);
                           // print(snodeStr)
                            // 添加node属性
                            data.append("      (snodeStr!)n".data(using: String.Encoding.utf8,allowLossyConversion: true)!)
                            data.write(toFile: filePath,atomically: true)
                        }
                      // 当前 子节点 结束
                      data.append("    </(node.name)>n".data(using: String.Encoding.utf8,allowLossyConversion: true)!)
                    }
                }
                
                // 当前 item 结束
                data.append("  </(items![i].name)>n".data(using: String.Encoding.utf8,allowLossyConversion: true)!)
                data.write(toFile: filePath,atomically: true)
            }
        
            // 当前 root 结束
            data.append("</(root)>n".data(using: String.Encoding.utf8,allowLossyConversion: true)!)
        
            //写入文件中
            data.write(toFile: filePath,atomically: true)
        
            print(filePath)
        }
    
        func ItemToString(_ item:Item) ->String {
            // 1 拼接 节点名称
            let nodeName = item.name
            var nodeStr:String = nodeName.elementStartTag() + " "
            
            if item.attributes?.count  == 0 {
                return nodeStr;
            }
            // 2 拼接节点 属性
            for (key,value) in (item.attributes)! {
                nodeStr += "(key)="(value)" "
            }
            nodeStr += ">"
            return nodeStr
        }
        
    func NodeToString(_ node:Node,isSub:Bool) ->String {
            // 1 拼接 节点名称
            let nodeName = node.name
            var nodeStr:String = nodeName.elementStartTag() + " "
            
            // 2 拼接节点 属性
            for (key,value) in (node.attributes)! {
                nodeStr += "(key)="(value)" "
            }
        
            if isSub {
                nodeStr += ">"
            }
            else {
                nodeStr += "/>"
            }
            return nodeStr
        }
    }
    
    class Item {
        init(name:String) {
            self.name = name;
            nodes = [];
        }
        var name:String = "";
        var attributes:[String:String]?
        var nodes:[Node]?;
        
        func addNode(_ node:Node){
            nodes?.append(node);
        }
        
    }
    
    class Node {
        init(name:String) {
            self.name = name;
            subNode = [];
        }
        init (){
            subNode = [];
        }
        var id = 0;
        var name = ""
        var attributes:[String:String]?
        var subNode:[Node]?;
        
        func addSubNode(_ node:Node){
            subNode?.append(node);
        }
    }
    
    
    extension String {
        
        func elementStartTag() -> String {
            return "<" + self
        }
        
        func elementEndAttributesTag() -> String {
            return  self + ">"
        }
        
        func elementEndTag() -> String {
            return "</" + self + ">"
        }
                
}

－－－－－－－－－－－－－－－－－代码调用－－－－－－－－－－－－－－－

dispatch_async(dispatch_get_main_queue()) { () ->Void in

// 1 创建xml文件路径，名称

let xml =XmlWrite(dir: "/Users/huangtao/Desktop/",fileName:"data.xml")

// 2 创建第一个节点数据

let item1:Item =Item(name: "Item1");

item1.attributes = ["A1":"1","A2":"2"]

for(var i=0;i<5;i++) {

let node =Node(name:"note-(i)");

node.id = i+1;

node.attributes = ["ID":"(i)","Name":"我的名称-(i)"]

item1.addNode(node);

}

xml.items?.append(item1);

// 3 创建第二个节点数据

let item2:Item =Item(name: "Item2");

for(var i=0;i<10;i++) {

let node =Node(name:"note-(i)");

node.id = i+1;

node.attributes = ["ID":"(i)","Name":"N-(i)","Disp":"1","Appliance":"1","Icon":"ic_switch_4"]

item2.addNode(node);

}

xml.items?.append(item2);

// 4 保存文件

xml.saveXml()

}

解析xml见博客:

http://www.52php.cn/article/p-xudpqbfh-bgc.html

（编辑：李大同）

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