iOS 7 Programming Cookbook

11.12. Parsing XML with NSXMLParser

Problem

You want to parse an XML snippet or document.

Solution

Use the NSXMLParser class.

Discussion

The NSXMLParser uses a delegate model to parse XML content. Let’s go ahead and create a simple XML file that contains the following data (save this file as MyXML.xml in your project):

<?xml version="1.0" encoding="UTF-8"?>
<root>

    <person id="1">
        <firstName>Anthony</firstName>
        <lastName>Robbins</lastName>
        <age>51</age>
    </person>

    <person id="2">
        <firstName>Richard</firstName>
        <lastName>Branson</lastName>
        <age>61</age>
    </person>

</root>

Now define a property of type NSXMLParser:

#import "AppDelegate.h"

@interface AppDelegate () <NSXMLParserDelegate>
@property (nonatomic, strong) NSXMLParser *xmlParser;
@end

@implementation AppDelegate

You can also see that I have defined my app delegate as an XML parser delegate by conforming to the NSXMLParserDelegate protocol, which is required for a delegate object of an XML parser of type NSXMLParser. Now let’s read the MyXML.xml file from the disk and pass it to your XML parser:

- (BOOL)            application:(UIApplication *)application
  didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{

    NSString *xmlFilePath = [[NSBundle mainBundle] pathForResource:@"MyXML"
                                                            ofType:@"xml"];

    NSData *xml = [[NSData alloc] initWithContentsOfFile:xmlFilePath];

    self.xmlParser = [[NSXMLParser alloc] initWithData:xml];
    self.xmlParser.delegate = self;
    if ([self.xmlParser parse]){
        NSLog(@"The XML is parsed.");
    } else{
        NSLog(@"Failed to parse the ...