getting object out from nsarray

Question

I'm new to objective c. There are a couple of object which i want to take out from this array results with is from JSON and i need help. How do i get objects out from this array? how can i get the features then the attributes and route name etc.

NSArray *directions=[jsonResult objectForKey:@"directions"];

    int i;
    NSArray *dict;
    int count = [directions count];
    for (i = 0; i < count; i++)
    {            
        NSLog (@"directions = %@", [directions objectAtIndex: i]);          
    }

The object that i want to get from

directions = {
features =     (
            {
        attributes =             {
            ETA = 1341190800000;
            length = 0;
            maneuverType = esriDMTDepart;
            text = "Start at 18304.680000,36152.730000";
            time = 0;
        };
        compressedGeometry = "+1+hrt+139j+0+0";
    },
            {
        attributes =             {
            ETA = 1341190800000;
            length = "1.43124650292492";
            maneuverType = esriDMTStraight;
            text = "Go southeast on PAN ISLAND EXPRESSWAY";
            time = "1.22675858855561";
        };
        compressedGeometry = "+1+hrt+139j+i9-a6+kp-bl";
    }
routeId = 1;
routeName = "18304.680000,36152.730000 - 29663.160389,40202.513760";
summary =     {
    envelope =         {
        spatialReference =             {
            wkid = 3414;
        };
        xmax = "29663.160018156";
        xmin = "18301.4360762186";
        ymax = "40229.9300290999";
        ymin = "35091.9900291003";
    };
    totalDriveTime = "24.8214824061658";
    totalLength = "17.2089251018779";
    totalTime = "24.8";
};

how can i do it?

the jsonresults that i got is the direction={...} mention abv — sihao
– sihao, Commented Jul 2, 2012 at 12:29

Omar Abdelhafith · Accepted Answer · 2012-07-02 12:28:12Z

2

[directions objectAtIndex: i] returns NSDictionary, if you want to get objects from it, do the following

NSDictionary *dic = [directions objectAtIndex: i];
[dic valueForKey:@"routeName"] //route name
[dic valueForKey:@"routeId"] //routeId
[dic valueForKey:@"features"] //returns an nsdictionery too
[[dic valueForKey:@"features"] valueForKey:@"text"] //returns an nsdictionery too

And so on

answered Jul 2, 2012 at 12:28

Omar Abdelhafith

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6 Comments

sihao Over a year ago

hmm.. do i have to put the object as NSDictionary?

Omar Abdelhafith Over a year ago

the directions array already contains a dictionary, you will just need to get the values out of it

sihao Over a year ago

thx. for the features is it an array? cos i have to get the attributes

Omar Abdelhafith Over a year ago

featues is an nsdictionary too, you can get each value inside it using valueForKey too

sihao Over a year ago

[dic valueForKey:@"attributes"]; and it got me a null how should i get it?

|

Basel · Accepted Answer · 2012-07-02 12:29:15Z

1

each object inside directions is an NSDictionary, and each object inside them is also a dictionary. So you will need something like this:

NSDictionary *directions=[jsonResult objectForKey:@"directions"];
NSDictionary *features = [directions objectForKey:@"features"];

...and so on, until you get all the values.

answered Jul 2, 2012 at 12:29

Basel

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3 Comments

sihao Over a year ago

can't work it got this error -[__NSCFArray objectForKey:]: unrecognized selector sent to instance 0xde3c210

Basel Over a year ago

Please post code on how you get jsonResult. It seems you're trying to access an NSArray as a dictionary.

sihao Over a year ago

responseData = [[NSMutableData data] retain]; NSURL *url = [NSURL URLWithString:format]; NSURLRequest *request = [NSURLRequest requestWithURL:url]; NSData *result = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil]; NSDictionary *jsonResult = [NSJSONSerialization JSONObjectWithData:result options:kNilOptions error:&error];

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