Instance Property

timestamp

The time when the touch occurred or when it was last mutated.

Declaration

var timestamp: TimeInterval { get }

Discussion

The value of this property is the time, in seconds since system startup, that the touch originated or was last changed. You can store the value of this property and compare it to the timestamp in subsequent UITouch objects to determine the duration of the touch and, if it is being swiped, the speed of movement. For a definition of the time since system startup, see the description of the systemUptime method of the ProcessInfo class.

See Also

Getting Touch Attributes

var tapCount: Int

The number of times the finger was tapped for this given touch.

var type: UITouchType

The type of the touch.

enum UITouchType

The type of touch received.

var phase: UITouchPhase

The phase of the touch.

enum UITouchPhase

The phase of a finger touch.

var force: CGFloat

The force of the touch, where a value of 1.0 represents the force of an average touch (predetermined by the system, not user-specific).

var maximumPossibleForce: CGFloat

The maximum possible force for a touch.

var altitudeAngle: CGFloat

The altitude (in radians) of the stylus.

func azimuthAngle(in: UIView?)

Returns the azimuth angle (in radians) of the stylus.

func azimuthUnitVector(in: UIView?)

Returns a unit vector that points in the direction of the azimuth of the stylus.