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SwiftEducation
DEPRECATED. An iOS app that uses time to illustrate controller and application life cycle events; and notifications.
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You can't invalidate the NSTimer in `deinit`, as `deinit` is never called since the NSTimer has a strong reference to the target, the controller. Invalidate the timer in something else,...
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DEPRECATED. An iOS app that uses time to illustrate controller and application life cycle events; and notifications.