XML and JSON parsing for iOS development

I. xml: an open-source parsing class, gdataxmlnode (add it to the project), and add the libxml2.dylib framework

Frequently used methods:

1.-(ID) initwithxmlstring :( nsstring *) STR options :( unsigned INT) mask error :( nserror *) Error

2.-(ID) initwithdata :( nsdata *) Data options :( unsigned INT) mask error :( nserror *) Error

The two methods can convert the data of the nsstring or nsdata class into XML documents that can be parsed by the gdataxmlnode class.

3.-(gdataxmlelement *) rootelement returns information about all nodes in gdataxmlelement.

4.-(nsarray *) elementsforname :( nsstring *) Name: returns all nodes named name under the current node, and returns an array.

5.-(nsstring *) stringvalue returns the value in the middle of the node.

 

Ii. JSON: sbjson, an open-source framework, is used to extend the nsstring class. All nsstring objects in our program can call the method.

Sbjson method-(ID) jsonvalue this method returns an ID class object, because JSON information is transmitted by key value, so we will use nsdictionary to receive this return value.

 

Two structures:

1. Set of "key-value pairs. Object, record, struct, Dictionary, hashtable, keyed list, and associative array ).

2. ordered list of values. Array ).