CODEWITHSUNDEEP
iosobjective-c
Timothy
Timothy

Reputation: 128

JSON iOS isEqualToString

I'm trying to check if a value in my .json file is "0" or "1".

My .json file:

{
    "timetable": [
      {
        "50mhour": "1",
        "on": "1"
      },
      {
        "50hour": "2",
        "on": "1"
      },
      {
        "50hour": "50min1",
        "on": "1"
      },
      {
        "techhour": "4",
        "on": "1"
      },
    ]
}

I created a method to call this URL:

-(void)makeRequests
{
    NSURL *url = [NSURL URLWithString:@"http://content.app.ch/api/timetable.json"];

    NSURLRequest *request = [NSURLRequest requestWithURL:url];

    AFJSONRequestOperation *operation = [AFJSONRequestOperation
                                         JSONRequestOperationWithRequest:request
                                         success:^(NSURLRequest *request, NSHTTPURLResponse *response, id responseObject)
                                         {

                                             self.get = [responseObject objectForKey:@"timetable"];       
                                         }
                                         failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id responseObject)
                                         {
                                             NSLog(@"Request Failed with Error: %@, %@", error, error.userInfo);
                                         }];

    [operation start];
}

And ofcourse, I created a NSDictionary as well

NSDictionary *tempDictionary= [self.get objectAtIndex:1];

I'm not quite sure about the objectAtIndex value.

What is the right way to check if a value is "0" or "1" I know isEqualToString: can probably do this but I'm not sure how.

UPDATE: Tried this as a suggestion from the answers below:

NSNumber *obj = [[self.get objectAtIndex:0] objectForKey:@"on"];
int onValue = [obj intValue];

if (onValue == 1) {
    NSLog(@"works!");
}

else {
    NSLog(@"doesn't work!");
}

The code works, but the JSON value is "1" and the NSlog still shows "doesn't work!".

Upvotes: 0

Views: 161

Answers (2)

Rajan Balana
Rajan Balana

Reputation: 3815

The flow of your JSON is like this:

You have the array in JSON and in that array, the first element is dictionary.

You first get the data from JSON directly into an array. Then get the first object of Array into dictionary and then get the value like this

Get the value for On from this code :

int on = [[[self.get objectAtIndex:0] objectForKey:@"on"] integerValue];

int value = [[[self.get objectAtIndex:0] objectForKey@"50hour"] integerValue]

Upvotes: 0

Alexander
Alexander

Reputation: 8147

The JSON-encoded array you presented (timetable) has only one element, so taking objectAtIndex:1 would crash your program/throw an out of bounds exception. Get element 0 or lastObject from the array and you'll have a pointer to the following dictionary:

{
"50hour": "1",
"on": "1"
}

Since this is a dictionary, the correct way to look up a value is by key:

NSNumber *obj = [[self.get objectAtIndex:0] objectForKey:@"on"]; // or @"50hour", whichever you need
int onValue = [obj intValue];

Upvotes: 1

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