CODEWITHSUNDEEP
iphoneobjective-casihttprequest
sharon
sharon

Reputation: 580

Saving JSON responce to NSDictionary

This is what my JSON return;

{
    "1": {
        "name": "Sharon",
        "telephone": "48-9929329483"

    },
    "2": {
        "name": "Sage",
        "telephone": "48-9560333267"
    },
    "3": {
        "name": "Alex",
        "telephone": "48-8467982378"
    }
}

I need to save this in a NSDictionary. My workings are as follows; 

 NSDictionary *contentOfDictionary = [responseString JSONValue];

NSDictionary* studentDictionary = [contentDictionary objectForKey:@"1"];
NSString *nameOfStudent = [studentDictionary objectForKey:@"name"];
NSString *nameOfStudent = [studentDictionary objectForKey:@"telephone"];

NSDictionary* studentDictionary1 = [contentDictionary objectForKey:@"2"];
NSString *nameOfStudent1 = [studentDictionary objectForKey:@"name"];
NSString *nameOfStudent1 = [studentDictionary objectForKey:@"telephone"];

..... etc

So this is what i do to save the attributes to dictionaries and strings. But the problem is that i am hard-coding the key value 1,2,3 etc.. (ex: [contentDictionary objectForKey:@"2"];)

In reality i don't know how many students will the JSON file have. There might be 100 or even more. So how can i write this in a way where the code will automatically, read JSON response (all 100 records) and save it to NSDictionary and vice versa ?

note: I guess i have to use a for loop or something.

Upvotes: 1

Views: 1090

Answers (4)

Piyush Kashyap
Piyush Kashyap

Reputation: 1965

Instead of using NSDictionary to store responsestring JSONValue

 NSDictionary *contentOfDictionary = [responseString JSONValue];

use NSArray to store responsestring JSONValue

  NSArray *arr= [responseString JSONValue];

In this way you will get the total count ,each object in the array is a dictionary which can be accessed easily.

Upvotes: 0

ksh
ksh

Reputation: 1904

Take a look at NSJSONSerialization available since iOS5 (or SBJSON framework). You'll get your JSON parsed and embedded in obj-c objects.

Upvotes: 0

JosephH
JosephH

Reputation: 37495

It looks like you have a dictionary in 'contentsOfDictionary' where the keys are "1", "2", ... and the values are dictionaries containing the names/telephone numbers. So you just need to iterate through all the values:

NSMutableArray *studentDictionaries = [[NSMutableArray alloc] init];
for (NSDictionary *studentDictionary in contentOfDictionary.allValues)
{
    [studentDictionaries addObject:studentDictionary];
}

Upvotes: 4

ikuramedia
ikuramedia

Reputation: 6058

If each dictionary entry in your JSON response is uniquely numbered and increasing without gaps, then you could do the following:

NSMutableArray *studentDictionaries = [[NSMutableArray alloc] init];
NSUInteger index = 1;
NSDictionary *studentDictionary;
while (studentDictionary = [contentDictionary objectForKey:[NSString stringWithFormat:@"%d", index++]]) {
    [studentDictionaries addObject:studentDictionary];
}

Upvotes: 1

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