How json array pages by id dart - flutter

Question

how all pages to map title print?
how json select example id=12 to map print title
{
"result": {
"name": "json1",
"pages": [
{
"zones": [
{
"title": "title1"
},
{
"title": "title2"
}
],
"id": 4
},
{
"zones": [
{
"title": "title3"
},
{
"title": "title4"
}
],
"id": 12
}
],
"creatorUserName": "admin",
"id": 2
}
}
List post = json;
children: post
.map( (post) => Container(
child: Center(child: Text(post.title]),)
))
.toList(),

Answer 1

I make a code to parse your json
var data = json.decode(jsonData);
var pagesArray = data["result"]["pages"];
pagesArray.forEach((page) {
var zones = page["zones"];
//Each id have your titles
int id = page["id"];
List<String> titles = new List();
zones.forEach((zone) {
titles.add(zone["title"]);
});
print("Id $id have this titles : ${titles.toString()}");
});