利用XMLDictionary解析xml 将XML文件转换为NSDictionary

关键方法：

NSDictionary *xmlContent = [NSDictionary dictionaryWithXMLString:dicItem[@"xmlContent"]];

NSString *xmlString = [[NSString alloc] initWithContentsOfURL:URL encoding:NSUTF8StringEncoding error:NULL];

为iOS和Mac OS平台上解析和生成XML提供了一个简单的方法，可方便地将XML文件转换为NSDictionary。可将任何字典的内容以XML形式输出。

首先当然是导入库。

• 代码类库：其他(Others)
• GitHub链接：https://github.com/nicklockwood/XMLDictionary

我纠结了一天做的是将xml解析，转换成NSDictionary

下方举例：

{
    "resultMsg": "获取成功", 
    "resultCode": 1, 
    "_rc": "success", 
    "mpList": [
        {
            "logo": "http://localhost.bi.cn/main/upload/201510/42091445914559867.jpg", 
            "mpName": "第一父母", 
            "xmlContent": "<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<xml><FromMpId>1</FromMpId><FromUserName><![CDATA[第一父母]]></FromUserName><CreateTime>2015-09-25 14:48:57</CreateTime><MsgType><![CDATA[news]]></MsgType><ArticleCount>1</ArticleCount><Articles><item><ArticleId><![CDATA[551]]></ArticleId><Title><![CDATA[EQ加油站 \\| 交换也是一种交往方式]]></Title><Description><![CDATA[当孩子用上百块的玩具车，换回了便宜的儿童画，家长该如何看待？是着眼于物品的经济价值，还是看到交换背后给孩子带来的成长？]]></Description><PicUrl><![CDATA[http://nmpic.xxt.cn/201509/19221442817544072.jpg]]></PicUrl><Url><![CDATA[http://nmmp.xxt.cn/appajax/viewArticle.do?articleId=551&s=youbeitong.cn]]></Url></item></Articles></xml>", 
            "mpId": "1"
        }, 
        {
            "logo": "http://nmmp.xxt.cn/mp/logo/2.png", 
            "mpName": "校讯通助手", 
            "xmlContent": "<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<xml><FromMpId>2</FromMpId><FromUserName><![CDATA[校讯通助手]]></FromUserName><CreateTime>2015-10-12 15:23:11</CreateTime><MsgType><![CDATA[news]]></MsgType><ArticleCount>1</ArticleCount><Articles><item><ArticleId><![CDATA[585]]></ArticleId><Title><![CDATA[家长课堂：家长常说10句话孩子更自信]]></Title><Description><![CDATA[自信，是你靠眼神传递给孩子的一种力量，是你能够为孩子添加的一双翅膀。要让孩子有接受挑战的勇气，不畏挫折的决心，关键就在于孩子的自信心。]]></Description><PicUrl><![CDATA[http://nmpic.xxt.cn/201510/37271444459901366.jpg]]></PicUrl><Url><![CDATA[http://nmmp.xxt.cn/appajax/viewArticle.do?articleId=585&s=youbeitong.cn]]></Url></item></Articles></xml>", 
            "mpId": "2"
        }, 
        
    ]
}

下方解析：

NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers error:&error];
        NSInteger resultCode = [[dict objectForKey:@"resultCode"]integerValue];
        if (resultCode==1){
            NSMutableArray *items=[NSMutableArray array];
            for (NSDictionary *dicItem in dict[@"mpList"]) {
                MainPageItem *item=[[MainPageItem alloc]init];
                item.messageId=dicItem[@"mpId"];
                item.messageImage=dicItem[@"logo"];
                item.messageName=dicItem[@"mpName"];
                
                //下方四句都是为获得item.messageContent服务的
                NSDictionary *xmlContent = [NSDictionary dictionaryWithXMLString:dicItem[@"xmlContent"]];
                NSDictionary *messageContentOne= xmlContent[@"Articles"];
                NSDictionary *messageContentTwo = messageContentOne[@"item"];
                item.messageContent = messageContentTwo[@"Description"];
                
                [items addObject:item];

<strong><span style="font-size:18px;">就是因为我没有看返回的内容，所以直接</span></strong>xmlContent[@"<span style="font-family: Arial, Helvetica, sans-serif;">Description</span>"];  导致错误好几次，下方正确的

      NSDictionary *xmlContent = [NSDictionary dictionaryWithXMLString:dicItem[@"xmlContent"]];
      NSDictionary *messageContentOne= xmlContent[@"Articles"];
      NSDictionary *messageContentTwo = messageContentOne[@"item"];
      item.messageContent = messageContentTwo[@"Description"];

这里是<span style="color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, STheiti, 微软雅黑, 黑体, Arial, Tahoma, sans-serif, serif;">XML文件转换为NSDictionary的文件：以后认真的根据这个来写字典输出的内容：</span>

<span style="color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, STheiti, 微软雅黑, 黑体, Arial, Tahoma, sans-serif, serif;"></span><pre name="code" class="objc">{
    ArticleCount = 1;
    Articles =     {
        item =         {
            ArticleId = 586;
            Description = "\U201c\U54ce\U5440\Uff0c\U5b69\U5b50\U597d\U50cf\U611f\U5192\U4e86\Uff0c\U5feb\U62ff\U70b9\U6d88\U708e\U836f\U6765\U3002\U201d\U8fd9\U6837\U7684\U573a\U666f\U5728\U5f88\U591a\U5bb6\U5ead\U4e2d\U90fd\U4e0d\U964c\U751f\U3002\U53ef\U60a8\U6709\U6ca1\U6709\U60f3\U8fc7\Uff0c\U968f\U4fbf\U7ed9\U5b69\U5b50\U4f7f\U7528\U6297\U751f\U7d20\U5b58\U5728\U7684\U5371\U9669\U6027\U5230\U5e95\U6709\U591a\U5927\U5462\Uff1f";
            PicUrl = null;
            Title = "\U6ee5\U7528\U6297\U751f\U7d20\U7684\U5371\U9669\U6027\Uff0c\U518d\U4e0d\U4e86\U89e3\U5c06\U4f1a\U4f24\U5230\U5b69\U5b50\Uff01";
            Url = "http://nmmp.xxt.cn/appajax/viewArticle.do?articleId=586&s=youbeitong.cn";
        };
    };
    CreateTime = "2015-10-10 16:34:17";
    FromMpId = 6;
    FromUserName = "\U5065\U5eb7\U517b\U80b2";
    MsgType = news;
    "__name" = xml;
}

上方 Description 是utf8码，输出自己就会变回原样了。

<span style="color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, STheiti, 微软雅黑, 黑体, Arial, Tahoma, sans-serif, serif;">下方举另一个例子：</span><pre name="code" class="objc">#import "AppDelegate.h"
#import "ViewController.h"
#import "XMLDictionary.h"

@implementation AppDelegate

- (BOOL)application:(__unused UIApplication *)application didFinishLaunchingWithOptions:(__unused NSDictionary *)launchOptions
{
    NSURL *URL = [[NSURL alloc] initWithString:@"http://www.ibiblio.org/xml/examples/shakespeare/all_well.xml"];
    NSString *xmlString = [[NSString alloc] initWithContentsOfURL:URL encoding:NSUTF8StringEncoding error:NULL];
    NSLog(@"string: %@", xmlString);
    NSDictionary *xmlDoc = [NSDictionary dictionaryWithXMLString:xmlString];
    NSLog(@"dictionary: %@", xmlDoc);
    
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
    self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible];
    return YES;
}

@end

上方NSDictionary *xmlContent = [NSDictionary dictionaryWithXMLString:dicItem[@"xmlContent"]];后打印出的xmlContent是：

{
    ArticleCount = 1;
    Articles =     {
        item =         {
            ArticleId = 551;
            Description = "\U5f53\U5b69\U5b50\U7528\U4e0a\U767e\U5757\U7684\U73a9\U5177\U8f66\Uff0c\U6362\U56de\U4e86\U4fbf\U5b9c\U7684\U513f\U7ae5\U753b\Uff0c\U5bb6\U957f\U8be5\U5982\U4f55\U770b\U5f85\Uff1f\U662f\U7740\U773c\U4e8e\U7269\U54c1\U7684\U7ecf\U6d4e\U4ef7\U503c\Uff0c\U8fd8\U662f\U770b\U5230\U4ea4\U6362\U80cc\U540e\U7ed9\U5b69\U5b50\U5e26\U6765\U7684\U6210\U957f\Uff1f";
            PicUrl = "http://nmpic.xxt.cn/201509/19221442817544072.jpg";
            Title = "EQ\U52a0\U6cb9\U7ad9 \\| \U4ea4\U6362\U4e5f\U662f\U4e00\U79cd\U4ea4\U5f80\U65b9\U5f0f";
            Url = "http://nmmp.xxt.cn/appajax/viewArticle.do?articleId=551&s=youbeitong.cn";
        };
    };
    CreateTime = "2015-09-25 14:48:57";
    FromMpId = 1;
    FromUserName = "\U7b2c\U4e00\U7236\U6bcd";
    MsgType = news;
    "__name" = xml;
}