How to filter array of NSDictionary for key separated by comma - iphone

Question

I have an array of NSDictionary.NSDictionary has a key named as multiple_image key that contain string separated by ,.
I want set of array that contain 123.png for multiple_images key.
Can some one show me how to do this using NSPredicate or without predicate.
//Array
{
Image = "<UIImage: 0xf72df30>";
active = yes;
"admin_id" = 169;
"category_id" = 32;
"chef_id" = 175;
descr = "Cool tea to cool down the mind.";
id = 110;
"multiple_images" = "Jellyfish.jpg,345.png";
name = "Southern Sweet Ice Tea";
price = 160;
rating = 3;
selected = 0;
"subcat_id" = 23;
"tag_id" = 45;
"tax_id" = 10;
"tax_value" = "12.00";
},
{
Image = "<UIImage: 0xf72ebd0>";
active = yes;
"admin_id" = 169;
"category_id" = 31;
"chef_id" = 175;
descr = "Ingredients are almonds or cashews. No hydrogenated stuff, no extra weirdo ingredients";
id = 107;
"multiple_images" = "Jellyfish.jpg,123.png";
name = "Butter Chicken";
price = 300;
rating = 3;
selected = 0;
"subcat_id" = 24;
"tag_id" = 43;
"tax_id" = 9;
"tax_value" = "0.00";
},
{
Image = "<UIImage: 0xf72f870>";
active = yes;
"admin_id" = 169;
"category_id" = 31;
"chef_id" = 173;
descr = "Raw vegetables including carrots, cucumbers.";
id = 100;
"multiple_images" = "Jellyfish.jpg,shake.png,";
name = Salads;
price = 50;
rating = 3;
selected = 0;
"subcat_id" = 22;
"tag_id" = 44;
"tax_id" = 9;
"tax_value" = "0.00";
}

Answer 1

Using predicates,
[array filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:#"multiple_images CONTAINS '123'"]];
Using predicates, but with blocks
NSArray *filtered = [test filteredArrayUsingPredicate:[NSPredicate predicateWithBlock:
^BOOL(NSDictionary *evaluatedObject, NSDictionary * bindings) {
NSString *key = #"123";
return ([evaluatedObject[#"multiple_images"] rangeOfString:key].location != NSNotFound);
}]];

Answer 2

Try
NSDictionary *item = mainArray[0];
NSString *imagesString = item[#"multiple_images"];
NSArray *images = [imagesString componentsSeparatedByString:#","];
Now you can use the images

Answer 3

Try this code
for (int i=0; i<[mainArray count]; i++) {
NSDictionary *item = [mainArray objectAtIndex:i];
NSString *imagesString = item[#"multiple_images"];
NSArray *images = [imagesString componentsSeparatedByString:#","];
for (int j=0;j<[images count]; j++) {
if ([[images objectAtIndex:j] isEqualToString:#"123.png"]) {
///Your Required code;
}
}
}

Answer 4

So you want to save the dictionary that has 123.png.
maybe you can try something like this:
NSMutableArray *arr = [NSMutableArray new];// your array of objects(dictionaries)
__block NSMutableArray *images123 = [NSMutableArray new];
[arr enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
NSMutableDictionary *dictionary = (NSMutableDictionary *)obj;
if([[dictionary allKeys]containsObject:#"multiple_images"]){
NSString *imageList = (NSString *)[dictionary objectForKey:#"multiple_images"];
NSArray *arrayImages = [imageList componentsSeparatedByString:#","];
if([arrayImages containsObject:#"123.png"]){
[images123 addObject:dictionary];
}
}
}];