iOS development-Simple parsing of JSON data

• What is JSON?

• JSON is a lightweight data format that is typically used for data interaction
• Data returned by the server to the client, usually in JSON format or XML format (except for file downloads)

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• is the JSON format much like a dictionary and array in OC?
  • {"Name": "Jack", "Age": 10}
  • {"Name": ["Jack", "Rose", "Jim"]}
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  • Note points in the standard JSON format: key must be double-quoted

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• To dig out specific data from JSON, you need to parse the JSON?
• JSON parsing scheme
• In iOS, there are 4 common parsing scenarios for JSON
• Jsonkit
• Sbjson
• Touchjson
• Nsjsonserialization (native Apple, best performance)

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• Common methods of Nsjsonserialization
  • OC object, JSON data
  • + (ID) jsonobjectwithdata: (NSData *) Data options: (nsjsonreadingoptions) opt error: (NSERROR *) error;
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  • OC Object--JSON data
  • + (NSData *) Datawithjsonobject: (ID) obj options: (nsjsonwritingoptions) opt error: (NSERROR *) error;

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