CODEWITHSUNDEEP
objective-cjsonjson-framework
Vegar
Vegar

Reputation: 12898

json-framework: EXC_BAD_ACCESS on stringWithObject

UPDATE:

I found that the reason for the previous error was an error in the documentation.

The method should be named proxyForJson, not jsonProxyObject...

But I'm still stuck, though.

I now get an EXC_BAD_ACCESS error inside stringWithObject some where. Any clues?

UPDATE 2:

My proxyForJson implementation is a cut-n-paste from then documentation:

- (id)proxyForJson {
    return [NSDictionary dictionaryWithObjectsAndKeys:
            Navn, @"Navn",
            Adresse, @"Adresse",
            Alder, @"Alder",
            nil];
}

Trying to make json serialization work for my custom objective-c class.

As I understand the documentation, json-framework can serialize custom objects, if they implement the jsonProxyObject method.

So I have this class:

@interface MyObject : NSObject {
    NSString *Name;
    NSString *Addresse;
    NSInteger Age;
}
@property (nonatomic, retain) NSString *Name;
@property (nonatomic, retain) NSString *Addresse;
@property (nonatomic, assign) NSInteger Age;
- (id)jsonProxyObject;
@end

And I try to serialize an array with some instances in it:

[json stringWithObject:list error:&error];

But all I get is he following error:

"JSON serialisation not supported for MyObject"

I guess the jsonWriter can't find my jsonProxyObject method for some reason, buy why?

Regards.

Upvotes: 2

Views: 1316

Answers (3)

v123
v123

Reputation: 1

In NSString, there is no stringWithObject: method. You should try using stringWithFormat: instead.

Upvotes: 0

Hemant
Hemant

Reputation: 19826

I am not sure whether this is the right thing to do but defining the class as follows, solves the problem:

@interface MyObject : NSObject {
    NSString *Name;
    NSString *Addresse;
    NSInteger *Age;
}

@property (nonatomic, retain) NSString *Name;
@property (nonatomic, retain) NSString *Addresse;
@property (nonatomic, retain) NSInteger *Age;

- (id)jsonProxyObject;

@end

Then initializing the variable as:

Age = [[NSNumber alloc] initWithInt:32];

Upvotes: 0

ff10
ff10

Reputation: 3147

Have you tried to turn on NSZombies and MallocStackLogging in your Executable Info pane to check the source of the EXC_BAD_ACCESS? If not, you might try this and check the console for the output. EXC_BAD_ACCESS is often an error caused by over-releasing an object somewhere.

Upvotes: 0

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