我将一些数据发送到Web服务，它以NSData返回一些JSON。 如何转换成Dict？（iOS 4.3）

Question

I send some credentials to a web-service.

I can get the responce as NSData or as an NSString.

Whats the simpleist way to convert the (NSData or NSString)JSON to a NSDictionary so I can process it?

Building for iOS4.3 Many Thanks, -Code

Answer 1

From iOS 5.0 and on you can use NSJSONSerialization , docs here .

There is a good tutorial on how to use it, here .

Answer 2

Use this :

NSString *urlString = [NSString stringWithFormat:kURLString,self.chapter,self.page];
NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlString]];
[urlRequest setHTTPMethod:@"POST"];
[urlRequest setHTTPBody:[urlString dataUsingEncoding:NSISOLatin1StringEncoding]];

NSData* responseData = [NSURLConnection sendSynchronousRequest:urlRequest returningResponse:nil error:nil];
NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSISOLatin1StringEncoding];


NSDictionary* result = [(NSDictionary*)[responseString JSONValue] objectForKey:@"Result"];

Answer 3

I use SBJson

NSArray *arrObj = (NSArray*)[[JsonParser sharedJsonParser] getObjectsFromJsonString:responseString];

response string is a JSON string here

Answer 4

Download SBJsonParser Framework using the link, http://github.com/stig/json-framework/downloads and add required classes to your project (SBJsonParser.h).

Import SBJsonParser.h and use the following code,

    SBJsonParser *parser = [[SBJsonParser alloc] init];

     //dictionary with name,id
     NSDictionary *jsonObject = [parser objectWithString:jsonString error:NULL];  

     //name array                
      NSMutableArray *nameArray = [[NSMutableArray alloc]init];
   for (NSMutableDictionary *dic in jsonObject){

      [nameArray addObject:[dic valueForKey:@"name"]];
    }