How to avoid the null array from json values?

Question

 if(arrSubCategory.count>0||arrSubCategory!=Nil)
            {
            for (NSDictionary *dicsub in arrSubCategory)
            {
                [dicSubCategory setObject:[dicsub objectForKey:@"category_id"] forKey:@"category"];
                [dicSubCategory setObject:[dicsub objectForKey:@"parent_id"] forKey:@"parent"];
                [dicSubCategory setObject:[dicsub objectForKey:@"image"] forKey:@"image"];
                [dicSubCategory setObject:[dicsub objectForKey:@"name"] forKey:@"name"];
                  NSLog(@"sub category parsing%@",dicSubCategory);
                [file addSubCategories:dicSubCategory];
            }

here i am checking the array count is greater than zero then the condition have to check.

->but what happens mean

(
  ()
)

one empty array has been get storing in my array,how to avoid this empty from my json values.

Answer 1

You can check the object in arr is NSDictionary or not

 for (NSDictionary *dicsub in arrSubCategory) 
 {
     if([dicsub isKindOfClass:[NSDictionary class]])
     {
            [dicSubCategory setObject:[dicsub objectForKey:@"category_id"] forKey:@"category"];
            [dicSubCategory setObject:[dicsub objectForKey:@"parent_id"] forKey:@"parent"];
            [dicSubCategory setObject:[dicsub objectForKey:@"image"] forKey:@"image"];
            [dicSubCategory setObject:[dicsub objectForKey:@"name"] forKey:@"name"];
            NSLog(@"sub category parsing%@",dicSubCategory);
            [file addSubCategories:dicSubCategory];
     }
 }

Answer 2

You are checking if Object is nil, you should check if its count is zero.

Try this way :

NSArray *arr = [DicWholeCategories objectForKey:@"subcategory"];

if(arr.count > 0)
{
   [arrSubCategory addObject:arr];
}

Answer 3

Lots of Mistakes:

First of all your condition is wrong. It should be

if(arrSubCategory.count > 0 && !arrSubCategory)

You will need an && operator here instead of || because both condition should be true means array count should be greater than 0 and it should not be nil to proceed.

Comparison of an object with Nil is also wrong it should be nil .

Second thing don't compare any object with nil like (object != nil) better to use just (!object) .

Last thing if you want to check the object is null or not use isKindOfClass: method which returns a BOOL value.

if (![arrSubCategory isKindOfClass:[NSNull class]])

Well to avoid the empty array just one line is enough:

if ([arrSubCategory count] > 0)