How to retrieve data from Firebase?

Question

I am trying to retrieve every object stored in Firebase. Not sure how to go ahead. The following is my code and snap.value printed. I need to retrieve String "cbc" and "cp24" as well as values for datasaved and url. "cbc" and "cp24" are names I entered when saving.

Ref_UsersBase.observeEventType(.Value, withBlock: { snapshot in

 if let snapshots = snapshot.children.allObjects as? [FDataSnapshot] {

            for snap in snapshots {

                print(snap.value)


            }              
        }
    })

{

// Here is snap.value printed:

{
"-KGOzXm1lLtyS23cOR-G" =     {
    cp24 =         {
        datesaved = "Apr 27, 2016";
        url = "https://www.google.ca/search?site=&source=hp&ei=H0chV6pfhKeOBJChpqAN&q=cp24+weather&oq=&gs_l=mobile-gws-hp.1.0.41l2.0.0.0.13343.1.1.0.1.1.0.368.368.3-1.1.0....0...1..64.mobile-gws-hp..0.1.6.2.JC6OI95nuYc";
    };
};
"-KGOznhRN0J2OVlIogZ0" =     {
    cbc =         {
        datesaved = "Apr 27, 2016";
        url = "http://www.cbc.ca/beta/news/canada/toronto";
    };
};

}

Answer 1

Here's what I have done in a similar situation, I hope it helps you.

I declare a variable to store snapshot.value, a first array to store the keys at the first level ("-KGOzXm1lLtyS23cOR-G") and a second array to store the keys at second level ("cp24").

var receivedData = [String:[String:[String:String]]]()
var firstKeyArray = [String]()
var secondKeyArray = [String]()

I store the whole snapshot.value in receivedData.

Ref_UsersBase.observeEventType(.Value, withBlock: { snapshot in
    self.receivedData = snapshot.value    
})

Fill firstKeyArray and secondKeyArray

var i = 0

for(key,_) in receivedData{
    firstKeyArray.append(key)
    for(key,_) in receivedData[firstKeyArray[i]]!{
        secondKeyArray.append(key)
    }
    i += 1
}

Finally you would access datesaved and url values like this

print(receivedData[firstKeyArray[0]]![secondKeyArray[0]]!["datesaved"]!)

//prints Apr 27