When VoiceOver is running, I tapped a button, or a label, it will announce something about this button or label. I want to do something when announcement completed. Is there some notifications to help me observe when the announcement is completed? Thanks!
how to observe the events or detect the notification when the iOS system announce over a button or a label when VoiceOver is running?
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Not exactly, no. However, and this is a terrible hack, you can monitor announcements that you, yourself, issue with
UIAccessibilityPostNotification()by subscripting to theUIAccessibilityAnnouncementDidFinishNotification. Provided you queue up speech at the right times, it may be a reasonable assumption that any of your announcements finishing indicates that all system announcements have ended.