RxSwift: Variables

• Wraps a BehaviorSubject and stores its current state.
• Can access the current value via value property.
• Use value to set a new element onto a variable (Don’t use onNext(_:)).
• Because it wraps a BehaviorSubject it is create with an initial value and it will replay its initial value to new subscribers.
• To access a variables BehaviorSubject call asObservable().
• Guaranteed NOT to emit an error.
• Can listen for error events but cannot add one.
• Will also automatically complete when it is about to be deallocated so you do not and cannot manually add .completed.
• Like any other subject it can be subscribed to by an observable to be reacted to when a new .next event is emitted.
• Useful for one off needs such as checking the current value without subscribing to receive updates.

var variable = Variable("James Forrest")
variable.value = "Scott Brown"

---

< All Posts