Reactive Cocoa Operators

ReactiveCocoa OperatorsHai Feng Kao

Quiz 1What does MVVM stand for?

Quiz2What are the advantages of MVVM?

Quiz 3

What is the speaker’s name?

ReactiveCocoa OperatorsHai Feng Kao

Hot n Cold

• Hot Signal• sends values regardless of

whether it has any subscribers

• but only send values after their their subscription time.

• Cold Signal• defers its work and the

sending of any values until it has a subscriber

Cold Signal Example

Hot Signal Example

map

filter

take

skip

skip

• RACObserve sends the current value immediately

distinctUntilChanged

merge

then

RACSubject

combineLatest:reduce:

zip:reduce:

Hot n Cold• Hot Signal

• sends values regardless of whether it has any subscribers

• but only send values after their their subscription time.

• Cold Signal• defers its work and the sending

of any values until it has a subscriber

Cold Signal Example

replay

replayLast

replayLazily

replay (another example)

replayLazily (another example)

same as replay

replayLast (another example)

Next Class

Q&A

Thank you