How to use Firebase in iOS without Get-Taglist-Component?

Hello I have almost the same problem but my situation is a bit more complicated …
my app interfaces with firebase which is composed as follows:

il file json che produce è questo:
{“articoli”:
{
“art1” : {
“contenuto” : “contenuto articolo”,
“css” : " css",
“data” : “04/01/18”,
“titolo” : “titolo articolo”
},
“art2” : {
“contenuto” : “contenuto articolo”,
“css” : “”,
“data” : “08/01/18”,
“titolo” : “titolo articolo”
},
“art3” : {
“contenuto” : “contenuto articolo”,
“css” : “”,
“data” : “12/01/18”,
“titolo” : “titolo articolo”
},
“art4” : {
“contenuto” : “contenuto articolo”,
“css” : “”,
“data” : “20/01/18”,
“titolo” : “titolo articolo”
}
}

}

My need would be to put art1, art2 etc in a list viewer and when you click on it you have to open the whole article with the title etc.
I tried to use the same solution but it does not go …
Help me please…