CODEWITHSUNDEEP
iosjson
Nhu Nguyen
Nhu Nguyen

Reputation: 874

Convert Object to json in iOS

I have this object: 

@interface EmailToSend : NSObject

@property (copy, nonatomic) NSString *Subject;
@property (copy, nonatomic) NSString *Body;
@property (strong, nonatomic) NSArray *Cc;
@property (strong, nonatomic) NSArray *Bcc;
@property (strong, nonatomic) NSArray *To;
@property (strong, nonatomic) EmailAddress *From;
@property (copy, nonatomic) NSString *Username;
@property (copy, nonatomic) NSString *Password;

@end

Bcc, To, From as Array EmailAdress

@interface EmailAddress : NSObject

@property (nonatomic, assign) int Id;
@property (copy, nonatomic) NSString *address;
@property (copy, nonatomic) NSString *displayName;

@end

I use the JSON framework in iOS to parse object EmailToSend:

 NSData *jsonData = [NSJSONSerialization dataWithJSONObject:emailToSend options:NSJSONWritingPrettyPrinted error:&writeError];
 NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

When I run the project, one error appears:

Terminating app due to uncaught exception
'NSInvalidArgumentException', reason: 'Invalid type in JSON write
(EmailToSend)

How to fix it?

Upvotes: 1

Views: 794

Answers (1)

dandan78
dandan78

Reputation: 13864

EmailToSend is a class type that you use in your application. However, the built-in JSON serializer in Cocoa can only work with simple types such as NSString NSArray etc. You will have to make you From property a string if you want it to work.

And as pointed out by Wain in his comment, the root element also needs to be an NSArray or NSDictionary.

Upvotes: 3

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