How to toggle a boolean value
Swift’s booleans have a toggle() method that flip them between true and false. That might sound simple, but the end result makes for much more natural Swift code:
var loggedIn = false
loggedIn.toggle()This is particularly useful in more complex data structures: myVar.prop1.prop2.enabled.toggle() avoids the potential typing errors that could be caused using manual negation.
Available from iOS 8.0
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