Advances the progress bar of a determinate progress indicator by the specified amount.
Original signature is '- (void)incrementBy:(double)delta'
Available in Mac OS X v10.0 and later.


- delta (Double)
- The amount by which to increment the progress bar. For example, if you want to advance a progress bar from 0.0 to 100.0 in 20 steps, you would invoke incrementBy: 20 times with a delta value of 5.0.

- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)