XML Parsing by objective-C code

Question

I just want to parse a String received from a Post Response, I know there are lib/classes like NSXMLParse and apple provides some example but not what I want, or I'm not ready to understand that code.

I receive this:

<object>
<id>1</id>
<alias>juan</alias>
<email>jps@sol.pro</email>
</object>
<object>
<id>2</id>
<alias>juana</alias>
<email>jpsa@sol.pro</email>
</object>

Then I need to parse, and get the data like this:

NSString *xmlThing = [response];
for xmlThing in-all <object>
{
    uint id = <id>1</id>
    NSString *alias = <alias>juan</alias>
    NSString *email = <email>email@email.com</email>
}

Why like this? because I think is the easiest way to do and parse all kind of html, xml, etc... files.

I appreciate all kind of help.

`NSXMLParser` looks like it would be the right choice for your example. What part about it are you having a hard time with? — Mike D, Feb 22 '13 at 14:56
Actually I don't understand the class reference `https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSXMLParser_Class/Reference/Reference.html` which method I should use to know how many are in the xml file? I need to know to loop all of them, then how I tell to return the value from a label? — Alejandro L., Feb 22 '13 at 15:05
`NSXMLParser` uses a pattern called delegation. See [this SO post](http://stackoverflow.com/a/1045854/620197) about delegation. It is used extensively through out all of the iOS/Foundation/UIKit APIs. The answer below is straight forward and should answer your question directly. — Mike D, Feb 22 '13 at 15:14

Mahendra Y · Answer 1 · 2016-05-06T12:05:48.160

6

You can use XMLReader class to parse XML file with little effort. for more detail checkout https://appengineer.in/2013/08/03/xml-parsing-using-xml-reader-in-objective-c/

edited May 06 '16 at 12:05

answered Sep 06 '14 at 05:44

Mahendra Y

1,941
20
26

gladimdim · Accepted Answer · 2013-04-04T10:00:50.920

You can use NSXMLParser and its delegate methods.

Example: In *.h file add NSXMLDelegate:

@interface YourClass: NSObject <NSXMLParserDelegate>

*.m file:

    @interface YourClass()
    @property NSMutableString *currentXMLValue;
    @property NSMutableArray *objects;
    @end

    @implementation YourClass{
    -(void) processXML {
    NSXMLParser *xmlParser = [[NSXMLParser alloc] initWithData: data];
    self.objects = [[NSMutableArray alloc] init];
    [xmlParser setDelegate: self];
    [xmlParser parse];
    }

    -(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
    {
        //each time part of string is found append it to current string
        [self.currentXMLValue appendString:string];
    }

//here you can check when <object> appears in xml and create this object
-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *) namespaceURI qualifiedName:(NSString *)qName
   attributes: (NSDictionary *)attributeDict
{
    //each time new element is found reset string
    self.currentXMLValue = [[NSMutableString alloc] init];
    if( [elementName isEqualToString:@"object"])
    {
        self.obj= [[YourObject alloc] init];
    }
}
//this is triggered when there is closing tag </object>, </alias> and so on. Use it to set object's properties. If you get </object> - add object to array.
    -(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
    {

        if ([elementName isEqualToString:@"id"]) {
           obj.id = [self.currentXMLValue intValue];
        }
        else if ([elementName isEqualToString:@"alias"]) {
           obj.alias = self.currentXMLValue;
        }
        else if ([elementName isEqualToString:@"object"]) {
        if (self.objects) {
            [self.object addObject:obj];
        }
        }
    //and so on
    } 
    }

It should be an object which contains your id, alias, email. — gladimdim, Feb 22 '13 at 21:37
@Monolo, thank you. I've updated my answer with your recommendation. — gladimdim, Apr 04 '13 at 10:01

score 0 · Answer 3 · answered Feb 22 '13 at 18:02

0

well the above answer seems perfect,but i would advice you to use some other parser if you are having large amount of data and faster processing speed you can probably use TBXML,xml comparison here

answered Feb 22 '13 at 18:02

sin

726
7
16

XML Parsing by objective-C code

3 Answers3