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
Did this solution work for you? Please pass it on!
Other people are reading…
- What is MVC?
- How to use #available to check for API availability
- How to check whether an integer lies inside a range
- How to calculate division remainder using modulo
- How to write a closure that returns a value
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
Test your Swift today
Think you know Swift? My book Swift Coding Challenges will put your Swift skills to the test – it's perfect for job interviews and more!
