Swift Firebase load array of arrays

Question

I am trying to load an array of arrays with Firebase and would appreciate any help on how to do so. Thanks! Picture is of database.

Shehata Gamal · Accepted Answer · 2020-05-08 18:13:45Z

1

You need to observe defense then inside the callback

self.ref.child("defense").observeSingleEvent(of: .value, with: { snap in 
   let res = snap.value as! [String:[String:Int]]
   let all = Array(res.values).map { Array($0.values) } // [[-1,-1,-1],[...]]
})

answered May 8, 2020 at 18:13

Shehata Gamal

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6 Comments

Tyler Rutt Over a year ago

its giving me 'Could not cast value of type '__NSArrayM' (0x1f4932630) to 'NSDictionary' (0x1f49335f8).'

Shehata Gamal Over a year ago

tell me what this gives print(type(of:snap.value))

Tyler Rutt Over a year ago

its a Optional<Any>

Shehata Gamal Over a year ago

and this let res = snap.value as! [[String:Any]]

Tyler Rutt Over a year ago

it says res is a ([[String: Any]]). The program stops and shows the varbiable values in the feed. No error msg just program breaks.

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