Pauses speech at the specified boundary constraint.
- iOS 7.0+
- macOS 10.14+
- UIKit for Mac 13.0+Beta
- tvOS 9.0+
- watchOS 3.0+
A constant describing whether speech should pause immediately or only after finishing the word currently being spoken.
YES if speech has paused, or
boundary parameter also affects the manner in which the synthesizer, once paused, continues speech upon a call to
continue. If paused with boundary constraint
AVSpeech, speech continues from exactly the point at which it was paused, even if that point occurred in the middle of pronouncing a word. If paused with
AVSpeech, speech continues from the word following the word on which it was paused.