Add Array in nsmutableaary - ios

Question

i am developing instragramm type app when user tap like button i want add username in likes arry
So I have a dictionary in a dictionary with arrays. I am trying to add to the arrays that are in the likes array.
{
caption = "Shakira Shakira...";
comments = (
);
"display_name" = Shakira;
ext = "<null>";
"image_id" = 53;
likes = (
);
"post_type" = i;
"total_comments" = 0;
"total_likes" = 0;
"upload_dt" = 3wk;
"user_id" = 7;
"user_liked" = 0;
},
{
caption = "Addicted to Shakira???";
comments = (
{
comment = "love your profile :)";
"display_name" = Rihanna;
"user_id" = 5;
},
{
comment = "You are my favorite celebrity on Follow Me.";
"display_name" = Pitbull;
"user_id" = 4;
},
{
comment = "Looking Good!";
"display_name" = "Justin Bieber";
"user_id" = 2;
}
);
"display_name" = Shakira;
ext = "<null>";
"image_id" = 52;
likes = (
{
"display_name" = "Justin Bieber";
"user_id" = 2;
},
{
"display_name" = Rihanna;
"user_id" = 5;
},
{
"display_name" = Pitbull;
"user_id" = 4;
}
);
"post_type" = i;
"total_comments" = 3;
"total_likes" = 3;
"upload_dt" = 2mth;
"user_id" = 7;
"user_liked" = 0;
},
i want add display_name and user_id

Answer 1

NSMutableArray *mutearr = [NSMutableArray arrayWithArray:array];
here array is NSArray and mutarr is NSMutablearray

Answer 2

You can use addObjectsFromArray: from NSMutableArray class
NSArray *animal = [[NSArray alloc]initWithObjects:#"Lion",#"Tiger",#"Dog",#"Cat",#"Sheep",#"Wolf", nil];
NSArray *color = [[NSArray alloc]initWithObjects:#"Blue",#"Red",#"Yellow",#"Green",#"Black", nil];
NSMutableArray *all = [[NSMutableArray alloc] init];
[all addObjectsFromArray:animal];
[all addObjectsFromArray:color];

Answer 3

var displayNames = [String]()
var userIds = [Int]()
let responseArray = (yourArray as? [NSDictionary]) ?? []
for ar in responseArray{
let display_name = ar.value(forKey: "display_name") as? String
displayNames.append(display_name ?? "")
let user_id = ar.value(forKey: "user_id") as? Int
userIds.append(user_id ?? 0)
}
print(displayNames,userIds)