Removes a previously installed periodic handler block.
If your VoIP app no longer needs to be woken up at periodic intervals, you can use this method to remove any previously installed handler.
The frame rectangle defining the area of the status bar.
The minimum amount of time (measured in seconds) an app may run a critical background task in the background.
Attempts to open the resource at the specified URL.
Sets the icon of a Newsstand app to an image depicting the current issue of a publication.
A Boolean value that determines whether the status bar is hidden.