FirebaseDatabase Framework Reference

FIRServerValue


@interface FIRServerValue : NSObject

Placeholder values you may write into Firebase Database as a value or priority that will automatically be populated by the Firebase Database server.

  • Placeholder value for the number of milliseconds since the Unix epoch

    Declaration

    Objective-C

    + (nonnull NSDictionary *)timestamp;
  • 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

    Objective-C

    + (nonnull NSDictionary *)increment:(nonnull NSNumber *)delta;

    Parameters

    delta

    the amount to modify the current value atomically.

    Return Value

    a placeholder value for modifying data atomically server-side.