FIRTimestamp
@interface FIRTimestamp : NSObject <NSCopying>
A Timestamp represents a point in time independent of any time zone or calendar, represented as seconds and fractions of seconds at nanosecond resolution in UTC Epoch time. It is encoded using the Proleptic Gregorian Calendar which extends the Gregorian calendar backwards to year one. It is encoded assuming all minutes are 60 seconds long, i.e. leap seconds are “smeared” so that no leap second table is needed for interpretation. Range is from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z. By restricting to that range, we ensure that we can convert to and from RFC 3339 date strings.
See
https://github.com/google/protobuf/blob/main/src/google/protobuf/timestamp.proto for the reference timestamp definition.-
Creates a new timestamp.
Declaration
Objective-C
- (nonnull instancetype)initWithSeconds:(int64_t)seconds nanoseconds:(int32_t)nanoseconds;
Parameters
seconds
the number of seconds since epoch.
nanoseconds
the number of nanoseconds after the seconds.
-
Creates a new timestamp.
Declaration
Objective-C
+ (nonnull instancetype)timestampWithSeconds:(int64_t)seconds nanoseconds:(int32_t)nanoseconds;
Parameters
seconds
the number of seconds since epoch.
nanoseconds
the number of nanoseconds after the seconds.
-
Creates a new timestamp from the given date.
Declaration
Objective-C
+ (nonnull instancetype)timestampWithDate:(nonnull NSDate *)date;
-
Creates a new timestamp with the current date / time.
Declaration
Objective-C
+ (nonnull instancetype)timestamp;
-
Returns a new
Date
corresponding to this timestamp. This may lose precision.Declaration
Objective-C
- (nonnull NSDate *)dateValue;
-
Returns the result of comparing the receiver with another timestamp.
Declaration
Objective-C
- (NSComparisonResult)compare:(nonnull FIRTimestamp *)other;
Parameters
other
the other timestamp to compare.
Return Value
orderedAscending
ifother
is chronologically following self,orderedDescending
ifother
is chronologically preceding self,orderedSame
otherwise. -
Represents seconds of UTC time since Unix epoch 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59Z inclusive.
Declaration
Objective-C
@property (nonatomic, readonly) int64_t seconds;
-
Non-negative fractions of a second at nanosecond resolution. Negative second values with fractions must still have non-negative nanos values that count forward in time. Must be from 0 to 999,999,999 inclusive.
Declaration
Objective-C
@property (nonatomic, readonly) int32_t nanoseconds;