how to parse json in ios using web url [closed] - ios

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hi i getting json from an external source and parsing it in ios. my code is below
Note = json and cats variables are NSArray;
NSURL * url = [NSURL URLWithString:#"http://myurl.json"];
NSData * data = [NSData dataWithContentsOfURL:url];
json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];
cats = [[NSMutableArray alloc] init];
for (int i=0; i < json.count; i++) {
NSString * CatId = [[json objectAtIndex:i] objectForKey:#"id"];
NSString * CatName = [[json objectAtIndex:i] objectForKey:#"name"];
NSString * CatIcon = [[json objectAtIndex:i] objectForKey:#"icon"];
categories * cat = [[categories alloc] initWithCId:CatId andCName:CatName andCIcon:CatIcon];
[cats addObject:cat];
and json is here
{"categories":[{"id":1,"name":"Healthcare","icon":"/icons/images/65/original_56.png?1386745569"},{"id":10,"name":"Mall","icon":"/icons/images/60/original_51.png?1386745369"},{"id":11,"name":"Taupheq","icon":"/icons/images/23/original_14.png?1386744595"},{"id":12,"name":"Hotel","icon":"/icons/images/27/original_18.png?1386744659"},{"id":13,"name":"SPA","icon":"/icons/images/48/original_39.png?1386745093"},{"id":14,"name":"ATM","icon":"/icons/images/22/original_13.png?1386744578"},{"id":15,"name":"Travel","icon":"/icons/images/12/original_3.png?1386744393"},{"id":16,"name":"Game zone","icon":"/icons/images/68/original_59.png?1386745626"},{"id":17,"name":"Academic","icon":"/icons/images/10/original_1.png?1386744264"},{"id":18,"name":"Textile","icon":"/icons/images/46/original_37.png?1386745050"}]}

Answer 1

Try this:
NSURL * url = [NSURL URLWithString:#"http://myurl.json"];
NSData * data = [NSData dataWithContentsOfURL:url];
NSDictionary * json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];
NSArray *catsArray = [NSArray arrayWithArray:[json objectForKey:#"categories"]];
cats = [[NSMutableArray alloc] init];
for (int i = 0; i < catsArray.count; i++) {
NSString * CatId = [[catsArray objectAtIndex:i] objectForKey:#"id"];
NSString * CatName = [[catsArray objectAtIndex:i] objectForKey:#"name"];
NSString * CatIcon = [[catsArray objectAtIndex:i] objectForKey:#"icon"];
categories * cat = [[categories alloc] initWithCId:CatId andCName:CatName andCIcon:CatIcon];
[cats addObject:cat];
}

Answer 2

try this:
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];
json = [dict objectForKey:#"categories"];

Answer 3

When you are trying this:
NSString * CatId = [[json objectAtIndex:i] objectForKey:#"id"];
It translates into: Array -> Dictionary -> String
But you can see you dont want this.
You want: Dictionary -> Array -> Dictionary ->String
In Code:
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];
NSArray *array = [dict objectForKey:#"categories"];
NSString * CatId = [[array objectAtIndex:0] objectForKey:#"id"];

Answer 4

try this . . .
NSURL * url = [NSURL URLWithString:#"http://myurl.json"];
NSData * data = [NSData dataWithContentsOfURL:url];
NSDictionary * json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];
NSArray * cat = [json objectForKey:#"categories"];
for(NSDictionary * tempdict in cat)
{
NSString * CatId = [NSString stringWithFormat:#"%#",[tempdict objectForKey:#"id"]];
NSString * CatName = [tempdict objectForKey:#"name"];
NSString * CatIcon = [tempdict objectForKey:#"icon"];
categories * cat = [[categories alloc] initWithCId:CatId andCName:CatName andCIcon:CatIcon];
}

Answer 5

THis should work : Consider the Json as NSMutableArray and then easily you ail get the array of the object one by one :
NSMutableArray *userDetails = [NSJSONSerialization JSONObjectWithData:returnData options:0 error:nil];
NSLog(#"User Det %#", userDetails);
if (userDetails == nil || [userDetails count] == 0) {
} else {
// 3. iterate the array; each element is a dictionary...
for (NSDictionary *lesson in userDetails)
{
NSString * CatId = [[catsArray objectAtIndex:i] objectForKey:#"id"];
NSString * CatName = [[catsArray objectAtIndex:i] objectForKey:#"name"];
NSString * CatIcon = [[catsArray objectAtIndex:i] objectForKey:#"icon"];
categories * cat = [[categories alloc] initWithCId:CatId andCName:CatName andCIcon:CatIcon];
[cats addObject:cat];
}
}

Answer 6

NSURL * url = [NSURL URLWithString:#"http://myurl.json"];
NSData * data = [NSData dataWithContentsOfURL:url];
NSDictionary *jsonData = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];
NSArray *myArray = [jsonData objectForKey:#"categories"];
cats = [[NSMutableArray alloc] init];
for (NSDictionary *temp in myArray) {
NSString * CatId = [NSString stringWithFormat:#"%d",[temp objectForKey:#"id"]];
NSString * CatName = [temp objectForKey:#"name"];
NSString * CatIcon = [temp objectForKey:#"icon"];
categories * cat = [[categories alloc] initWithCId:CatId andCName:CatName andCIcon:CatIcon];
[cats addObject:cat];
}