โœจ
Combine ๐Ÿค RxSwift ๐Ÿค ReactiveSwift
  • Combine ๐Ÿค RxSwift ๐Ÿค ReactiveSwift
  • Publisher
    • Publishers.Merge
    • Publishers.Zip3
    • Publishers.TryScan
    • Publishers.MergeMany
    • Publishers.Breakpoint
    • AnyPublisher
    • Publishers.Concatenate
    • Publishers.Drop
    • Publishers.Decode
    • Publishers.TryCompactMap
    • Publishers.CombineLatest4
    • Optional.Publisher
    • Publishers.CollectByCount
    • Publishers.TryFilter
    • Publishers.CombineLatest3
    • Publishers.TryContainsWhere
    • Just
    • Publishers.TryFirstWhere
    • Publishers.MapError
    • Publishers.RemoveDuplicates
    • Result.Publisher
    • Publishers.LastWhere
    • Publishers.First
    • Publishers.Throttle
    • Publishers.DropUntilOutput
    • Publishers.Count
    • Publishers.Comparison
    • Publishers.Debounce
    • Publishers.MapKeyPath
    • Publishers.CollectByTime
    • Publishers.TryDropWhile
    • Empty
    • Publishers.PrefixUntilOutput
    • Publishers.Print
    • URLSession.DataTaskPublisher
    • Publishers.Reduce
    • Publishers.MapKeyPath3
    • Publishers.Collect
    • Publishers.TryPrefixWhile
    • Publishers.MapKeyPath2
    • Future
    • Publishers.SubscribeOn
    • Publishers.AllSatisfy
    • Publishers.Retry
    • Publishers.ContainsWhere
    • Publishers.SetFailureType
    • Publishers.TryMap
    • Publishers.Output
    • Publishers.TryRemoveDuplicates
    • Publishers.HandleEvents
    • Publishers.Sequence
    • Publishers.TryCatch
    • Publishers.Merge8
    • Publishers.CombineLatest
    • Deferred
    • Publishers.Merge7
    • Publishers.Contains
    • Fail
    • Publishers.Merge6
    • Publishers.TryComparison
    • Publishers.Delay
    • Publishers.Scan
    • Publishers.Merge5
    • Publishers.MeasureInterval
    • Publishers.AssertNoFailure
    • Publishers.ReceiveOn
    • Publishers.Merge4
    • Publishers.DropWhile
    • Publishers.Merge3
    • Publishers.TryReduce
    • Publishers.Zip
    • Publishers.Timeout
    • Publishers.CompactMap
    • Publishers.ReplaceEmpty
    • Publishers.PrefixWhile
    • Publishers.Filter
    • Publishers.TryAllSatisfy
    • Publishers.FirstWhere
    • Publishers.Last
    • Publishers.Map
    • Publishers.SwitchToLatest
    • Publishers.TryLastWhere
    • Publishers.Encode
    • Publishers.Catch
    • Publishers.ReplaceError
    • Pulishers.IgnoreOutput
    • Publishers.Zip4
  • Subject
    • PassthroughSubject
    • CurrentValueSubject
  • Subscriber
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  • RxSwift
  • ReactiveSwift
  • ์ฐธ๊ณ 

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  1. Publisher

Publishers.Merge

์ œ๋„ค๋ฆญ ๊ตฌ์กฐ์ฒด | ๋‘ ๊ฐœ์˜ ์ƒ์œ„ Publisher์— ๊ฒฐํ•ฉ ํ•จ์ˆ˜๋ฅผ ์ ์šฉํ•˜์—ฌ ์ƒ์„ฑ๋˜๋Š” Publisher

์ด๋‹ˆ์…œ๋ผ์ด์ €๋Š” ์กฐํ•ฉํ•  ๋‘ ๊ฐœ์˜ Publisher๋ฅผ ๋ฐ›๋Š”๋‹ค.

์ธ์ž์— ๋“ค์–ด๊ฐ€๋Š” ๋ชจ๋“  Publisher์˜ Output ํƒ€์ž…๊ณผ ์—๋Ÿฌ ํƒ€์ž…์€ ๊ฐ™์•„์•ผ ํ•œ๋‹ค.

๋‘ ๊ฐœ์˜ ์ŠคํŠธ๋ฆผ์„ ํ•˜๋‚˜๋กœ ํ•ฉ์ณ ํ•˜๋‚˜์˜ ์ŠคํŠธ๋ฆผ์„ ๋‹ค๋ฃจ๋Š” ๊ฒƒ์ฒ˜๋Ÿผ ํ•˜๊ธฐ ์œ„ํ•ด ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ๋‹ค.

merge ์˜คํผ๋ ˆ์ดํ„ฐ์™€ ๊ด€๋ จ์ด ์žˆ๋‹ค.

let aSubject = PassthroughSubject<Int, Never>()
let bSubject = PassthroughSubject<Int, Never>()

// Publishers.Merge Publisher
Publishers
  .Merge(aSubject, bSubject)
  .sink(receiveCompletion: { completion in
    switch completion {
    case .failure:
      print("Combine Merge Error")
    case .finished:
      print("Combine Merge Finish")
    }
  }, receiveValue: { value in
    print("Combine Merge : \(value)")
  })
  .store(in: &cancellables)

// merge Operator
aSubject
  .merge(with: bSubject)
  .sink(receiveCompletion: { completion in
    switch completion {
    case .failure:
      print("Combine Merge Error")
    case .finished:
      print("Combine Merge Finish")
    }
  }, receiveValue: { value in
    print("Combine Merge : \(value)")
  })
  .store(in: &cancellables)

// 1
aSubject.send(1)
// 2
aSubject.send(2)
// 3
bSubject.send(3)
// 4
bSubject.send(4)

// Combine Merge : 1
// Combine Merge : 2
// Combine Merge : 3
// Combine Merge : 4

์ฝ”๋“œ๋Š” ๋‹ค์Œ๊ณผ ๊ฐ™์ด ๋™์ž‘ํ•œ๋‹ค.

  1. 1์˜ ์ฝ”๋“œ๋ฅผ ์‹คํ–‰ํ•˜์—ฌ aSubject์— 1์˜ ๊ฐ’์„ ์ „๋‹ฌํ•œ๋‹ค. ํ•ด๋‹น Publisher๋Š” 1์˜ ๊ฐ’์„ ๋‚ธ๋‹ค.

  2. 2์˜ ์ฝ”๋“œ๋ฅผ ์‹คํ–‰ํ•˜์—ฌ aSubject์— 2์˜ ๊ฐ’์„ ์ „๋‹ฌํ•œ๋‹ค. ํ•ด๋‹น Publisher๋Š” 2์˜ ๊ฐ’์„ ๋‚ธ๋‹ค.

  3. 3์˜ ์ฝ”๋“œ๋ฅผ ์‹คํ–‰ํ•˜์—ฌ bSubject์— 3์˜ ๊ฐ’์„ ์ „๋‹ฌํ•œ๋‹ค. ํ•ด๋‹น Publisher๋Š” 3์˜ ๊ฐ’์„ ๋‚ธ๋‹ค.

  4. 4์˜ ์ฝ”๋“œ๋ฅผ ์‹คํ–‰ํ•˜์—ฌ bSubject์— 4์˜ ๊ฐ’์„ ์ „๋‹ฌํ•œ๋‹ค. ํ•ด๋‹น Publisher๋Š” 4์˜ ๊ฐ’์„ ๋‚ธ๋‹ค.

RxSwift

merge ์˜คํผ๋ ˆ์ดํ„ฐ๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ๊ตฌํ˜„ํ•  ์ˆ˜ ์žˆ๋‹ค.

let aSubject = PublishSubject<Int>()
let bSubject = PublishSubject<Int>()

Observable.merge(aSubject, bSubject)
  .subscribe(onNext: { value in
    print("RxSwift Merge : \(value)")
  }, onError: { _ in
    print("RxSwift Merge Error")
  }, onCompleted: {
    print("RxSwift Merge Finish")
  })
  .disposed(by: disposeBag)

aSubject.onNext(1)
aSubject.onNext(2)
bSubject.onNext(3)
bSubject.onNext(4)

// RxSwift Merge : 1
// RxSwift Merge : 2
// RxSwift Merge : 3
// RxSwift Merge : 4

ReactiveSwift

merge ์˜คํผ๋ ˆ์ดํ„ฐ๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ๊ตฌํ˜„ํ•  ์ˆ˜ ์žˆ๋‹ค.

let aProperty = MutableProperty<Int>(0)
let bProperty = MutableProperty<Int>(0)

aProperty.signal
  .merge(with: bProperty.signal)
  .observe { event in
    switch event {
    case let .value(value):
      print("ReactiveSwift Merge : \(value)")
    case .failed:
      print("ReactiveSwift Merge Error")
    case .completed:
      print("ReactiveSwift Merge Finish")
    default:
      break
    }
  }

aProperty.value = 1
aProperty.value = 2
bProperty.value = 3
bProperty.value = 4

// ReactiveSwift Merge : 1
// ReactiveSwift Merge : 2
// ReactiveSwift Merge : 3
// ReactiveSwift Merge : 4
// ReactiveSwift Merge Finish

์ฐธ๊ณ 

PreviousPublisherNextPublishers.Zip3

Last updated 5 years ago

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ReactiveX - Operators - Merge