hi, I use pairwise with BehaviorRelay to listener the userInfo's changes, by compared with old and new, then make some animation.
Expected: use pairwise with behaviorRelay, when there is a new subscription, behaviorRelay will emit latest element and with the power of pairwise, subscription will get a old and new tuple
Actual: use pairwise with behaviorRelay, behaviorRelay will stop emit latest element for new subscription
Anyone helps?
// use pairwise
UserDetailManager.shared
.userDetailUpdateRelay
.pairwise()
.subscribe(onNext: { [weak self] (old, new) in
// BehaviorRelay not emit latest element for subscription
// thought I read the doc that pairwise will not emit anything until the source observable emits at least 2 elements
// however, after behaviorRelay has emit > 2 elements, BehaviorRelay will not emit any element for the new subscription
})
.disposed(by: rx.disposeBag)
// not use pairwise
UserDetailManager.shared
.userDetailUpdateRelay
.subscribe(onNext: { [weak self] data in
// BehaviorRelay will emit latest element for subscription
// for example, A UIView as a observer to subscribe this relay will get the latest element to show something for user
})
.disposed(by: rx.disposeBag)
hi, I use pairwise with BehaviorRelay to listener the userInfo's changes, by compared with old and new, then make some animation.
Expected: use pairwise with behaviorRelay, when there is a new subscription, behaviorRelay will emit latest element and with the power of pairwise, subscription will get a old and new tuple Actual: use pairwise with behaviorRelay, behaviorRelay will stop emit latest element for new subscription
Anyone helps?