Observer Never Removed (ARCH9033)
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Key swift.async.observer-never-removed · Severity warning · Category async
Flags NotificationCenter observers, KVO observers and timers added by a class that never removes / invalidates them.
Incorrect
Section titled “Incorrect”NotificationCenter.default.addObserver(self, selector: #selector(update), name: .x, object: nil)Correct
Section titled “Correct”deinit { NotificationCenter.default.removeObserver(self) }Remove the observer (or invalidate the timer) in deinit, or keep the token and cancel it.