Getting the values of data stored in firebase
问题 I'm trying to get access to the values stored in firebase dashboard to use them in different functions and methods in the class. I used this method in this question I have tried to print their values, the whole app has crashed and it gave me that their nil! They are not nil actually! I used a similar method in viewDidLoad and I could retrieve the values to labels! let refer = FIRDatabase.database().reference().child("UserDevices") var globalEmail : String! var globalPhone : String! var