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POcannot parse json string into nsdictionary
 

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  1. POcannot parse json string into nsdictionary
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    <p>Im trying to parse a json string using sbjsonparser. Im having trouble converting it to nsdictionary. I've used sbjsonparser in my other classes and they all worked fine. see my code.</p> <pre><code>-(void)parseJsonString { NSLog(@"%@",jsonString); SBJsonParser *parser = [[SBJsonParser alloc] init]; NSDictionary *dict; dict = [parser objectWithString:jsonString error:nil]; NSLog(@"%@",dict); NSDictionary *dict2; dict2 = [jsonString JSONValue]; NSLog(@"%@",dict2); [parser release]; </code></pre> <p>}</p> <p>here's my console output:</p> <pre><code>2011-08-12 13:56:55.098 EasyQuiz[5446:13603] [{ "q": "Question Testing", "score": 1, "c3": "Choice C", "c2": "Choice B", "c1": "Choice A", "rev": 1, "id": 1, "c4": "Choice D" }] 2011-08-12 13:56:55.686 EasyQuiz[5446:13603] (null) 2011-08-12 13:56:56.296 EasyQuiz[5446:13603] -JSONValue failed. Error is: Illegal start of token [] 2011-08-12 13:56:56.297 EasyQuiz[5446:13603] (null) </code></pre> <p>I checked the string at <a href="http://jsonformatter.curiousconcept.com/" rel="nofollow">http://jsonformatter.curiousconcept.com/</a> and it appears to be valid. what do you think is causing this problem? thanks!</p> <p>I printed the error in dict = [parser objectWithString:jsonString error:nil]; and it says:</p> <pre><code> Error Domain=org.brautaset.SBJsonParser.ErrorDomain Code=0 "Illegal start of token []" UserInfo=0x62eb920 {NSLocalizedDescription=Illegal start of token []} </code></pre> <p><strong>EDIT</strong> I tried hardcoding the jsonstring like this</p> <pre><code>NSString *thisJsonString = @"[{\"q\": \"Question Testing\",\"score\": 1, \"c3\": \"Choice C\", \"c2\": \"Choice B\", \"c1\": \"Choice A\", \"rev\": 1, \"id\": 1, \"c4\": \"Choice D\"}]"; SBJsonParser *parser = [[SBJsonParser alloc] init]; NSDictionary *dict; dict = [parser objectWithString:thisJsonString error:nil]; NSLog(@"dict %@",dict); [parser release]; </code></pre> <p>and I got what I want in the console:</p> <pre><code>dict ( { c1 = "Choice A"; c2 = "Choice B"; c3 = "Choice C"; c4 = "Choice D"; id = 1; q = "Question Testing"; rev = 1; score = 1; } ) </code></pre> <p><strong>EDIT</strong> In case you want to know where I get the data. I downloading a zip file from a website using asihttprequest and the this file is extracted using objective-zip and the extracted file is read like this.</p> <pre><code>NSString *filePath = [[self applicationDocumentsDirectory] stringByAppendingPathComponent:@"json.zip"]; //Opening zip file for reading... progressLabel.text = @"Reading file..."; ZipFile *unzipFile= [[ZipFile alloc] initWithFileName:filePath mode:ZipFileModeUnzip]; //Opening first file... progressLabel.text = @"Opening file..."; [unzipFile goToFirstFileInZip]; ZipReadStream *read1= [unzipFile readCurrentFileInZip]; //Reading from first file's stream... NSMutableData *data1= [[[NSMutableData alloc] initWithLength:1000000] autorelease];//100MB int bytesRead1= [read1 readDataWithBuffer:data1]; NSLog(@"bytes: %d",bytesRead1); if (bytesRead1 &gt; 0) { progressLabel.text = @"File is good!"; jsonString = [[[NSString alloc] initWithData:data1 encoding:NSUTF8StringEncoding] autorelease]; //.... more codes follow, but this is how I get jsonString </code></pre>
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    1. COI am not sure what is going wrong but that is not a dictionary its an array
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    2. COIm not sure I understand you right, but Im using this code to convert that json string into an nsdictionary using this code. This piece of code works fine in all my other classes. just this feed is giving me errors. SBJsonParser *parser = [[SBJsonParser alloc] init]; NSDictionary *dict; dict = [parser objectWithString:jsonString error:nil]; NSLog(@"%@",dict);
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    3. COIf the string is an array you can't force it to be converted to a dictionary. Look at the [JSON standard](http://www.json.org/) -- "object" in JSON is an NSDictionary but "array" is NSArray/
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