ServerValue
class ServerValue : NSObjectPlaceholder values you may write into Firebase Database as a value or priority that will automatically be populated by the Firebase Database server.
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Placeholder value for the number of milliseconds since the Unix epoch
Declaration
Swift
class func timestamp() -> [AnyHashable : Any] -
Returns a placeholder value that can be used to atomically increment the current database value by the provided delta.
The delta must be a long or double value. If the current value is not an integer or double, or if the data does not yet exist, the transformation will set the data to the delta value. If either of the delta value or the existing data are doubles, both values will be interpreted as doubles. Double arithmetic and representation of double values follow IEEE 754 semantics. If there is positive/negative integer overflow, the sum is calculated as a double.
Declaration
Swift
class func increment(_ delta: NSNumber) -> [AnyHashable : Any]Parameters
deltathe amount to modify the current value atomically.
Return Value
a placeholder value for modifying data atomically server-side.