How can i add NSSpeechSynthesizer Class Reference.
I think it is in
/System/Library/Frameworks/AppKit.framework.
However there is no such framework name in framework window when I am clicking add existing frame work.
Can any one help me to do it.
AppKit framework is MacOS framework, not iOS, and so NSSpeechSynthesizer class is also available on Mac only.
Check this question on SO for the list of some 3rd-party text-to-speach engines available on iPhone
VSSpeechSynthesizer is available for the iOS - but it is a private API and as such will likely be rejected from the app store. However you can still make apps for private consumption. I consider this a bug as it makes creating accessible apps for the partially sighted for instance, harder. I have filed Bug ID #: 9451650 Bug Title: VSSpeechSynthesizer is Private
I currently use Flite TTS in my App. All hopes fix on the Nuance integration in iOS5 being available as a public API.
You can find it inside iPhone SDK /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.0.sdk /System/Library/PrivateFrameworks/VoiceServices.framework/VoiceServices
来源：https://stackoverflow.com/questions/6264958/how-can-i-add-nsspeechsynthesizer-class-reference