IPhone ios json parsing process, tutorial

The following are some of your friendly support:

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JSONIs the current popular data format, andXMLCompared,JSONMore clever. When the metadata is the same,JSONIn most casesXMLThe transfer case is small.JSONPerformance ComparisonXMLFast.

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And I am using this: JSON-framework
Wait until the next job is completed.JSONThe amount of data is sentProjectAnd thenClassTo useJSON LibraryAs longJSON. hYou can.

{    "glossary": {        "title": "example glossary",        "GlossDiv": {            "title": "S",            "GlossList": {                "GlossEntry": {                    "ID": "SGML",                    "SortAs": "SGML",                    "GlossTerm": "Standard Generalized Markup Language",                    "Acronym": "SGML",                    "Abbrev": "ISO 8879:1986",                    "GlossDef": {                        "para": "A meta-markup language, used to create markup languages such as DocBook.",                        "GlossSeeAlso": ["GML", "XML"]                    },                    "GlossSee": "markup"                }            }        }    }}

The above information will be stored in oneData. JSON.
Currently, this example is used:

NSString *filePath = [[NSBundle mainBundle] pathForResource:@"data" ofType:@"json"];    NSString *jsonStr = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];              SBJsonParser *parser = [[SBJsonParser alloc] init];    NSDictionary *json = [parser objectWithString:jsonStr error:nil];         NSDictionary *glossary = [json objectForKey:@"glossary"];    NSString *glossaryTitle = [glossary objectForKey:@"title"];         NSDictionary *glossDiv = [glossary objectForKey:@"GlossDiv"];    NSString *glossDivTitle = [glossDiv objectForKey:@"title"];         NSArray *glossSeeAlso = [[[[glossDiv objectForKey:@"GlossList"]                                objectForKey: @"GlossEntry"]                                     objectForKey: @"GlossDef"]                                         objectForKey: @"GlossSeeAlso"];         NSLog(@"Glossary Title: %@", glossaryTitle);    NSLog(@"GlossDiv Title : %@", glossDivTitle);         NSLog(@"GlossSeeAlso item 1: %@", [glossSeeAlso objectAtIndex:0]);    NSLog(@"GlossSeeAlso item 2: %@", [glossSeeAlso objectAtIndex:1]);

Row 3 is to include the case inNsstring.
CreateJSON parser, Too soonJSONString successObject.
Line 2 willJSONString successNsdictionaryAnd thisNsdictionaryInternalObjectHas beenJSON parserParse into the corresponding object, for example:Nsarray,Nsdictionary,NsstringAnd so on.
The fourth line uses the word ""."Glossary"ExtractionObjectBecauseObjectIs the information that includes the following parts:

{        "title": "example glossary",        "GlossDiv": {            "title": "S",            "GlossList": {                "GlossEntry": {                    "ID": "SGML",                    "SortAs": "SGML",                    "GlossTerm": "Standard Generalized Markup Language",                    "Acronym": "SGML",                    "Abbrev": "ISO 8879:1986",                    "GlossDef": {                        "para": "A meta-markup language, used to create markup languages such as DocBook.",                        "GlossSeeAlso": ["GML", "XML"]                    },                    "GlossSee": "markup"                }            }        }    }

The first row uses the above information plus the relevant words."Title"Extract content, and add the words related to the above information"Title"Content is"Example glossary", SoObjectIsNsstring
Object.
14th rows are extracted"Glossseealso"As follows:

["GML", "XML"]

As you can see, this isArray, SoObjectIsNsarray object.

The following content will be printed at the end:

2010-08-27 15:15:44.003 JSON[47655:207] Glossary Title: example glossary2010-08-27 15:15:44.049 JSON[47655:207] GlossDiv Title : S2010-08-27 15:15:44.050 JSON[47655:207] GlossSeeAlso item 1: GML2010-08-27 15:15:44.050 JSON[47655:207] GlossSeeAlso item 2: XML

IfJSONResources are retrieved by the network. You can use the following methods:

NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://pro.ctlok.com/data.json"]];NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];NSString *jsonStr = [[NSString alloc] initWithData:response encoding:NSUTF8StringEncoding];

Example: json.zip