Functional Reactive Programming in Swift

一次在知乎 iOS 组的内部分享

Transcript

1. Functional Reactive Programming in Swift X140Yu@Zhihu 2017/05
2. What is FRP?
3. FRP Functional Reactive
4. FRP Functional Reactive first class and higher-order functions pure functions Example
5. FRP Functional Reactive first class and higher-order functions pure functions asynchronous data streams touch event, KVO, Notification, callback, Network response,timer
6. Functional Reactive + Stream Transform Binding
7. Stream Like a pipe, if you missed the thing through it, it's gone forever Like an Array, it can hold anything Unlike an Array, you can't access it anytime you want, instread, you get notified when it's value get changed
8. Functional Reactive + Stream Transform Binding
9. Transform Higher-order functions, map, filter, reduce, flatMap, etc Change a stream to another stream, just like change a sequence to another Write our own version of there functions!
10. Functional Reactive + Stream Transform Binding
11. Binding Without binding, all the efforts are useless it makes the program more reactive
12. Functional Reactive + Stream Transform Binding
13. Functional Reactive + + Swift
14. Functional Reactive + + Swift Functional language Compiler & strong typed
15. Functional Reactive + + Swift Functional language Compiler & strong typed Write awesome program!
16. Functional Reactive + + Swift Improve productivity Less and more centralised code Easy to maintain Good Bad Learning curve is steep, but not that steep Debug may be difficult Change the way you think when coding Avoid complexity with mutable state growing over time
17. How
18. A simple demo Email validation
19. The unit of reactive programming Observable Subscriber
20. The unit of reactive programming Observable Subscriber 1
21. The unit of reactive programming Observable Subscriber 1
22. Observable: send messages Subscriber: consume messages The unit of reactive programming
23. Observable The unit of reactive programming Sequence What is sequence? Demo
24. The unit of reactive programming Implement our own Observable/Subscriber pattern?
25. Use a library instead! ReactiveSwift/ReactiveCocoa ReactiveKit RxSwift/RxCocoa Why I choose RxSwift?
26. To be continued……