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Editorial Team
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Asked: 2026-05-16T23:35:58+00:00

SBJsonParser *parser = [[SBJsonParser alloc] init]; NSMutableArray *componenti = [parser objectWithString:@[\Item1\,\Item2\]]; NSAssert([componenti isMemberOfClass:[NSMutableArray class]],@err);

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SBJsonParser *parser = [[SBJsonParser alloc] init];
NSMutableArray *componenti = [parser
                               objectWithString:@"[\"Item1\",\"Item2\"]"];
NSAssert([componenti isMemberOfClass:[NSMutableArray class]],@"err");

This code gives me an assertion failed. What is wrong?

The header file says:

@brief The JSON parser class.

JSON is mapped to Objective-C types in the following way:

@li Null -> NSNull
@li String -> NSMutableString
@li Array -> NSMutableArray
etc...
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1 Answer

  1. Editorial Team

    use NSAssert([componenti isKindOfClass:[NSMutableArray class]],@"err"); instead.

    I never really investigated this behavior but it seems that every time you instantiate a NSMutableArray, you received an instance of __NSArrayM in return. __NSArrayM is a subclass of NSMutableArray.

    And btw, SBJson is an excellent parser and I use it for a while now.

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