Objective-C JSON - Convert JSON object to native object?

Question

{"status": "FRE", "list": [{"make": "Toyota", "id": 1, "model": "camry", "engine": "Four Cylinder"}{"make": "Ford", "id": 3, "model": "focus", "engine": "Four Cylinder"}]}

How do I extract each "car" JSON object and put it into a native object? I'm using SBJSON. Here is my current code, but it is only able to extract one car element, when I need to be able to iterate through each car object and save it:

NSString *responseString = [request responseString];
     NSString *responseDict = [responseString JSONValue];

     NSArray *keys = [NSArray arrayWithObjects:@"id",@"make",@"model",@"engine", nil];
     NSArray *objects = [NSArray arrayWithObjects:[responseDict valueForKeyPath:@"list.make"],[responseDict valueForKeyPath:@"list.model"],[responseDict valueForKeyPath:@"list.id"],[responseDict valueForKeyPath:@"list.engine"] , nil];

     self.car = [[NSDictionary alloc]initWithObjects:objects forKeys:keys];

elado · Accepted Answer · 2011-12-31 20:23:05Z

9

Instead of doing everything manually, use Jastor - https://github.com/elado/jastor You just need to create simple classes and initWithDictionary will do the entire assigning work for you.

answered Dec 31, 2011 at 20:23

elado

8,7809 gold badges55 silver badges60 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

ManjotSingh · Accepted Answer · 2012-04-02 14:37:59Z

2

Try to reason like this.. when you do [[[request responseString] JSONValue] valueForKey:@"list"]]; it will return an array of list of your cars.

Then you iterate each array and save it into your car element...

Example:

NSArray *arrayCar =  [NSArray arrayWithArray:[[[request responseString] JSONValue] valueForKey:@"list"]];


for (NSDictionary *carDict in arrayCar) {
Car car = [[Car alloc] init]; 
car.id = [carDict valueForKey:@"id"]; 
car.origin= [carDict valueForKey:@"make"];
 ... ... }

edited Apr 2, 2012 at 14:37

ManjotSingh

7117 silver badges20 bronze badges

answered Sep 28, 2011 at 22:08

wanmuz

2981 silver badge8 bronze badges

4 Comments

spentak Over a year ago

Works great. I just wasn't quite getting it, but understand now completely.

Mattias Wadman Over a year ago

Any special resaon for using arrayWithArray: even when list should be an array? Does it check type?

wanmuz Over a year ago

No it does not check type, I gave an example of an array referring to the example given above.. If not, i normally do a class check : if ([[[request responseString] JSONValue] valueForKey] isKindOfClass:[NSArray class]) .. else if ([[[request responseString] JSONValue] valueForKey:@"list"] isKindOfClass:[NSString class]] ...

wanmuz Over a year ago

You need to know what kind of format you will receive and you will treat in the client's side.. and treat all the case possible, for example if i'm getting [[[request responseString] JSONValue] valueForKey:@"FRE"], it will return an NSDictionary instead of NSArray

Collectives™ on Stack Overflow

Objective-C JSON - Convert JSON object to native object?

2 Answers 2

Comments

4 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

4 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related