The current progress of the animation.
- macOS 10.4+
This property contains the completion percentage of the animation. Valid values are in the range
0 represents the beginning of the animation and
1 represents the end of the animation.
Changing the value of this property adjusts the progress of a running animation. Setting this property to a value less than
0 sets the value of the property to
0. Similarly, specifying a value greater than
1 changes the value of the property to
NSAnimation class updates the value of this property during the animation. To perform additional tasks at specific progress points, use the delegate’s