November 2016
Intermediate to advanced
480 pages
14h 42m
English
If you have not already completed the silver challenge, do that first!
Now that your buttons react when the app starts or stops speaking, give the user a way to know how long speaking will continue. Add an NSProgressIndicator to your interface and update it to show a rough estimate of how much speaking has been completed. For bonus points, make the progress indicator visible only when the app is speaking.
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