├── .swift-version ├── _Pods.xcodeproj ├── docs ├── _config.yml └── demo.gif ├── .swiftlint.yml ├── Example ├── RxPager │ ├── AppDelegate.swift │ ├── Images.xcassets │ │ └── AppIcon.appiconset │ │ │ └── Contents.json │ ├── Info.plist │ ├── PagerTableViewController.swift │ └── Base.lproj │ │ ├── LaunchScreen.xib │ │ └── Main.storyboard ├── RxPager.xcodeproj │ ├── project.xcworkspace │ │ └── contents.xcworkspacedata │ ├── xcshareddata │ │ └── xcschemes │ │ │ └── RxPager-Example.xcscheme │ └── project.pbxproj ├── Podfile ├── RxPager.xcworkspace │ └── contents.xcworkspacedata ├── README.md ├── Tests │ ├── Info.plist │ └── Tests.swift └── Podfile.lock ├── Makefile ├── RxPager.playground ├── playground.xcworkspace │ └── contents.xcworkspacedata ├── contents.xcplayground └── Contents.swift ├── .gitignore ├── RxPager.podspec ├── .travis.yml ├── LICENSE ├── README.md └── RxPager └── Classes └── RxPager.swift /.swift-version: -------------------------------------------------------------------------------- 1 | 4.0 2 | -------------------------------------------------------------------------------- /_Pods.xcodeproj: -------------------------------------------------------------------------------- 1 | Example/Pods/Pods.xcodeproj -------------------------------------------------------------------------------- /docs/_config.yml: -------------------------------------------------------------------------------- 1 | theme: jekyll-theme-minimal -------------------------------------------------------------------------------- /docs/demo.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/RxSwiftCommunity/RxPager/HEAD/docs/demo.gif -------------------------------------------------------------------------------- /.swiftlint.yml: -------------------------------------------------------------------------------- 1 | excluded: 2 | - Example/Pods/RxSwift 3 | - Example/Pods/RxCocoa 4 | line_length: 5 | - 110 6 | disabled_rules: 7 | - variable_name -------------------------------------------------------------------------------- /Example/RxPager/AppDelegate.swift: -------------------------------------------------------------------------------- 1 | import UIKit 2 | 3 | @UIApplicationMain 4 | class AppDelegate: UIResponder, UIApplicationDelegate { 5 | var window: UIWindow? 6 | } 7 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | # Install Tasks 2 | 3 | install-lint: 4 | brew install swiftlint 5 | 6 | # Run Tasks 7 | publish: 8 | pod trunk push RxPager.podspec 9 | 10 | lint: 11 | swiftlint lint --strict 2>/dev/null 12 | -------------------------------------------------------------------------------- /RxPager.playground/playground.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /RxPager.playground/contents.xcplayground: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | -------------------------------------------------------------------------------- /Example/RxPager.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /Example/Podfile: -------------------------------------------------------------------------------- 1 | platform :"ios", "9.0" 2 | source 'https://github.com/CocoaPods/Specs.git' 3 | use_frameworks! 4 | 5 | target 'RxPager_Example' do 6 | pod 'RxCocoa', '~> 6.5' 7 | pod 'RxPager', :path => '../' 8 | end 9 | 10 | target 'RxPager_Tests' do 11 | inherit! :search_paths 12 | pod 'RxCocoa', '~> 6.5' 13 | pod 'RxPager', :path => '../' 14 | end 15 | -------------------------------------------------------------------------------- /Example/RxPager.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 9 | 10 | 12 | 13 | 14 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # OS X 2 | .DS_Store 3 | 4 | # Xcode 5 | build/ 6 | *.pbxuser 7 | !default.pbxuser 8 | *.mode1v3 9 | !default.mode1v3 10 | *.mode2v3 11 | !default.mode2v3 12 | *.perspectivev3 13 | !default.perspectivev3 14 | xcuserdata/ 15 | *.xccheckout 16 | profile 17 | *.moved-aside 18 | DerivedData 19 | *.hmap 20 | *.ipa 21 | 22 | # AppCode 23 | .idea/ 24 | 25 | # Bundler 26 | .bundle 27 | 28 | Pods/ 29 | -------------------------------------------------------------------------------- /RxPager.podspec: -------------------------------------------------------------------------------- 1 | Pod::Spec.new do |s| 2 | s.name = "RxPager" 3 | s.version = "3.0.0" 4 | s.summary = "A simple Pager class fo Rx." 5 | s.homepage = "https://github.com/pgherveou/RxPager" 6 | s.license = 'MIT' 7 | s.author = { "Pierre-Guillaume Herveou" => "pgherveou@gmail.com" } 8 | s.source = { :git => "https://github.com/RxSwiftCommunity/RxPager.git", :tag => s.version.to_s } 9 | s.social_media_url = 'https://twitter.com/pgherveou' 10 | s.ios.deployment_target = '9.0' 11 | s.source_files = 'RxPager/Classes/**/*' 12 | s.dependency 'RxSwift', "~> 6.5" 13 | end 14 | -------------------------------------------------------------------------------- /.travis.yml: -------------------------------------------------------------------------------- 1 | # references: 2 | # * http://www.objc.io/issue-6/travis-ci.html 3 | # * https://github.com/supermarin/xcpretty#usage 4 | 5 | language: objective-c 6 | osx_image: xcode9 7 | xcode_sdk: iphonesimulator11.0 8 | before_install: 9 | - gem install cocoapods xcpretty --no-rdoc --no-ri --no-document --quiet 10 | - pod install --project-directory=Example --repo-update 11 | script: 12 | - set -o pipefail && xcodebuild -workspace Example/RxPager.xcworkspace -scheme RxPager-Example -configuration 'Debug' -destination 'platform=iOS Simulator,name=iPhone 7,OS=11.0' -sdk iphonesimulator build test | xcpretty -c 13 | - pod lib lint 14 | -------------------------------------------------------------------------------- /Example/README.md: -------------------------------------------------------------------------------- 1 | # Demo App 2 | 3 | Build and Run the RxPager-Example target from Xcode. 4 | The demo app display a simple tableview with a paged datasource 5 | 6 | ![demo](http://pgherveou.github.io/RxPager/demo.gif) 7 | 8 | ```swift 9 | override func viewDidLoad() { 10 | super.viewDidLoad() 11 | 12 | // scan, and update dataSource 13 | page 14 | .scan([Int](), accumulator: +) 15 | .subscribe(onNext: { [weak self] in self?.dataSource = $0 }) 16 | .addDisposableTo(disposeBag) 17 | 18 | // update dataSource and reset the animating flag, when the stream complete 19 | page 20 | .subscribe(onCompleted: { [weak self] in 21 | self?.showAnimatingCell = false 22 | self?.tableView.reloadData() 23 | }) 24 | .addDisposableTo(disposeBag) 25 | } 26 | ``` 27 | -------------------------------------------------------------------------------- /Example/Tests/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | en 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | $(PRODUCT_BUNDLE_IDENTIFIER) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | BNDL 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleSignature 20 | ???? 21 | CFBundleVersion 22 | 1 23 | 24 | 25 | -------------------------------------------------------------------------------- /Example/Podfile.lock: -------------------------------------------------------------------------------- 1 | PODS: 2 | - RxCocoa (6.5.0): 3 | - RxRelay (= 6.5.0) 4 | - RxSwift (= 6.5.0) 5 | - RxPager (3.0.0): 6 | - RxSwift (~> 6.5) 7 | - RxRelay (6.5.0): 8 | - RxSwift (= 6.5.0) 9 | - RxSwift (6.5.0) 10 | 11 | DEPENDENCIES: 12 | - RxCocoa (~> 6.5) 13 | - RxPager (from `../`) 14 | 15 | SPEC REPOS: 16 | https://github.com/CocoaPods/Specs.git: 17 | - RxCocoa 18 | - RxRelay 19 | - RxSwift 20 | 21 | EXTERNAL SOURCES: 22 | RxPager: 23 | :path: "../" 24 | 25 | SPEC CHECKSUMS: 26 | RxCocoa: 94f817b71c07517321eb4f9ad299112ca8af743b 27 | RxPager: 39fd914ee24fd457f398d2998265d43ea5a49af9 28 | RxRelay: 1de1523e604c72b6c68feadedd1af3b1b4d0ecbd 29 | RxSwift: 5710a9e6b17f3c3d6e40d6e559b9fa1e813b2ef8 30 | 31 | PODFILE CHECKSUM: fa5c2eeb4e75740eb58ccdc26b2ec2abc03053ee 32 | 33 | COCOAPODS: 1.11.0 34 | -------------------------------------------------------------------------------- /Example/RxPager/Images.xcassets/AppIcon.appiconset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "idiom" : "iphone", 5 | "size" : "20x20", 6 | "scale" : "2x" 7 | }, 8 | { 9 | "idiom" : "iphone", 10 | "size" : "20x20", 11 | "scale" : "3x" 12 | }, 13 | { 14 | "idiom" : "iphone", 15 | "size" : "29x29", 16 | "scale" : "2x" 17 | }, 18 | { 19 | "idiom" : "iphone", 20 | "size" : "29x29", 21 | "scale" : "3x" 22 | }, 23 | { 24 | "idiom" : "iphone", 25 | "size" : "40x40", 26 | "scale" : "2x" 27 | }, 28 | { 29 | "idiom" : "iphone", 30 | "size" : "40x40", 31 | "scale" : "3x" 32 | }, 33 | { 34 | "idiom" : "iphone", 35 | "size" : "60x60", 36 | "scale" : "2x" 37 | }, 38 | { 39 | "idiom" : "iphone", 40 | "size" : "60x60", 41 | "scale" : "3x" 42 | } 43 | ], 44 | "info" : { 45 | "version" : 1, 46 | "author" : "xcode" 47 | } 48 | } -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Copyright (c) 2017 RxSwiftCommunity 2 | 3 | Permission is hereby granted, free of charge, to any person obtaining a copy 4 | of this software and associated documentation files (the "Software"), to deal 5 | in the Software without restriction, including without limitation the rights 6 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 7 | copies of the Software, and to permit persons to whom the Software is 8 | furnished to do so, subject to the following conditions: 9 | 10 | The above copyright notice and this permission notice shall be included in 11 | all copies or substantial portions of the Software. 12 | 13 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 16 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 17 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 18 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 19 | THE SOFTWARE. 20 | -------------------------------------------------------------------------------- /Example/RxPager/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | en 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | $(PRODUCT_BUNDLE_IDENTIFIER) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | APPL 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleSignature 20 | ???? 21 | CFBundleVersion 22 | 1 23 | LSRequiresIPhoneOS 24 | 25 | UILaunchStoryboardName 26 | LaunchScreen 27 | UIMainStoryboardFile 28 | Main 29 | UIRequiredDeviceCapabilities 30 | 31 | armv7 32 | 33 | UISupportedInterfaceOrientations 34 | 35 | UIInterfaceOrientationPortrait 36 | UIInterfaceOrientationLandscapeLeft 37 | 38 | 39 | 40 | -------------------------------------------------------------------------------- /RxPager.playground/Contents.swift: -------------------------------------------------------------------------------- 1 | import PlaygroundSupport 2 | import RxSwift 3 | import RxPager 4 | 5 | PlaygroundPage.current.needsIndefiniteExecution = true 6 | 7 | // MARK: Example 1 8 | 9 | typealias Page = [Int] 10 | typealias Callback = () -> Void 11 | 12 | // take previous Page, and create next one 13 | let nextPage = { (previousPage: Page?) -> Observable in 14 | let last = previousPage?.last ?? 0 15 | return Observable.just([last + 1, last + 2, last + 3]) 16 | } 17 | 18 | // return true if there are more pages to be emitted 19 | let hasNext = { (page: Page) -> Bool in 20 | guard let last = page.last else { return true } 21 | return last < 10 // arbitrary condition for the demo 22 | } 23 | 24 | // create the pager 25 | let trigger = PublishSubject() 26 | let page$ = Observable.page(make: nextPage, while: hasNext, when: trigger) 27 | let next = trigger.onNext 28 | 29 | page$.subscribe(onNext: { print($0) }) 30 | // print [1, 2 ,3] 31 | 32 | next(()) // print [4, 5, 6] 33 | next(()) // print [7, 8, 9] 34 | next(()) // print [10, 11, 12] 35 | 36 | // MARK: Example 2 (page from array) 37 | 38 | Observable 39 | .page(Array(1...10), by: 3, when: trigger) 40 | .subscribe(onNext: { print($0) }) 41 | 42 | // print [1, 2 ,3] 43 | next(()) // print [4, 5, 6] 44 | next(()) // print [4, 5, 6] 45 | next(()) // print [10] 46 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # RxPager 2 | 3 | [![CI Status](http://img.shields.io/travis/RxSwiftCommunity/RxPager.svg?style=flat)](https://travis-ci.org/RxSwiftCommunity/RxPager) 4 | [![Version](https://img.shields.io/cocoapods/v/RxPager.svg?style=flat)](http://cocoapods.org/pods/RxPager) 5 | [![License](https://img.shields.io/cocoapods/l/RxPager.svg?style=flat)](http://cocoapods.org/pods/RxPager) 6 | [![Platform](https://img.shields.io/cocoapods/p/RxPager.svg?style=flat)](http://cocoapods.org/pods/RxPager) 7 | 8 | ## Usage 9 | 10 | ```swift 11 | // MARK: Example 1 12 | 13 | typealias Page = [Int] 14 | typealias Callback = () -> Void 15 | 16 | // take previous Page, and create next one 17 | let nextPage = { (previousPage: Page?) -> Observable in 18 | let last = previousPage?.last ?? 0 19 | return Observable.just([last + 1, last + 2, last + 3]) 20 | } 21 | 22 | // return true if there are more pages to be emitted 23 | let hasNext = { (page: Page) -> Bool in 24 | guard let last = page.last else { return true } 25 | return last < 10 // arbitrary condition for the demo 26 | } 27 | 28 | // create the pager 29 | let trigger = PublishSubject() 30 | let page$ = Observable.page(nextPage, while: hasNext, when: trigger) 31 | let next = trigger.onNext 32 | 33 | page$.subscribe(onNext: { print($0) }) 34 | // print [1, 2 ,3] 35 | 36 | next() // print [4, 5, 6] 37 | next() // print [7, 8, 9] 38 | next() // print [10, 11, 12] 39 | 40 | // MARK: Example 2 (page from array) 41 | 42 | Observable 43 | .page(Array(1...10), by: 3, when: trigger) 44 | .subscribe(onNext: { print($0) }) 45 | 46 | // print [1, 2 ,3] 47 | next() // print [4, 5, 6] 48 | next() // print [4, 5, 6] 49 | next() // print [10] 50 | ``` 51 | 52 | See [Demo](https://github.com/pgherveou/RxPager/blob/master/Example/RxPager/PagerTableViewController.swift) for more examples 53 | 54 | ## Example 55 | 56 | To run the example project, or run the playground, clone the repo, and run `pod install` from the Example directory first. 57 | 58 | ## Requirements 59 | 60 | ## Installation 61 | 62 | RxPager is available through [CocoaPods](http://cocoapods.org). To install 63 | it, simply add the following line to your Podfile: 64 | 65 | ```ruby 66 | pod "RxPager" 67 | ``` 68 | 69 | ## Credits 70 | This pod is inspired by inspired by @mttkay work https://gist.github.com/mttkay/24881a0ce986f6ec4b4d 71 | and was refactored using ideas discussed here https://github.com/RxSwiftCommunity/RxSwiftExt/issues/30 72 | 73 | ## License 74 | 75 | RxPager is available under the MIT license. See the LICENSE file for more info. 76 | -------------------------------------------------------------------------------- /RxPager/Classes/RxPager.swift: -------------------------------------------------------------------------------- 1 | import Foundation 2 | import RxSwift 3 | 4 | // MARK: Observable + Pager 5 | 6 | extension Observable { 7 | 8 | /// Create a Pager Observable. 9 | /// 10 | /// - Parameters: 11 | /// - nextPage: The paging function used to generate new page. 12 | /// - hasNext: The hasNext function to define if there are more pages. 13 | /// - trigger: The Observable used to trigger next page. 14 | /// - Returns: The paged Observable. 15 | public static func page(make nextPage: @escaping (Element?) -> Observable, 16 | while hasNext: @escaping (Element) -> Bool, 17 | when trigger: Observable) -> Observable { 18 | 19 | // get next page and recurse 20 | func next(_ fromPage: Element?) -> Observable { 21 | return nextPage(fromPage).map { (page: Element) -> Observable in 22 | guard hasNext(page) else { return Observable.just(page) } 23 | return Observable.concat([ 24 | Observable.just(page), 25 | Observable.never().take(until: trigger), 26 | next(page) 27 | ]) 28 | }.flatMap { $0 } 29 | } 30 | 31 | return next(nil) 32 | } 33 | 34 | /// Create a Pager from an array 35 | /// 36 | /// - Parameters: 37 | /// - array: The array to page 38 | /// - pageSize: The size of each page emitted by the pager. 39 | /// - trigger: An Observable used to trigger next page load. 40 | /// - Returns: The paged Observable. 41 | public static func page(_ array: [Element], by pageSize: Int, 42 | when trigger: Observable) -> Observable<[Element]> { 43 | 44 | var index = array.startIndex 45 | 46 | func hasNext(_: [Element]) -> Bool { 47 | return index != array.endIndex 48 | } 49 | 50 | func nextPage(_: [Element]?) -> Observable<[Element]> { 51 | let newIndex = array.index(index, offsetBy: pageSize, limitedBy: array.endIndex) ?? array.endIndex 52 | let slice = array[index...just(Array(slice)) 55 | } 56 | 57 | return Observable<[Element]>.page(make: nextPage, while: hasNext, when: trigger) 58 | } 59 | } 60 | 61 | // MARK: Pager 62 | 63 | /// A wrapper class that encapsulate both the Pager Observable and the trigger 64 | public struct Pager { 65 | 66 | /// page stream 67 | public let page: Observable 68 | 69 | // trigger used to call next page 70 | private let trigger = PublishSubject() 71 | 72 | /// Create a Pager 73 | /// 74 | /// - parameter nextPage: The paging function used to generate new page 75 | /// - parameter hasNext: The hasNext function to define if there are more pages 76 | public init(make nextPage: @escaping (T?) -> Observable, while hasNext: @escaping (T) -> Bool) { 77 | page = Observable.page(make: nextPage, while: hasNext, when: trigger.asObservable()) 78 | } 79 | 80 | /// trigger the next page 81 | public func next() { 82 | trigger.onNext(()) 83 | } 84 | } 85 | -------------------------------------------------------------------------------- /Example/RxPager/PagerTableViewController.swift: -------------------------------------------------------------------------------- 1 | import UIKit 2 | import RxSwift 3 | import RxCocoa 4 | import RxPager 5 | 6 | // MARK: Helper 7 | 8 | private let startLoadingOffset: CGFloat = 20.0 9 | private func isNearTheBottomEdge(_ contentOffset: CGPoint, _ tableView: UITableView) -> Bool { 10 | return contentOffset.y + 11 | tableView.frame.size.height + 12 | startLoadingOffset > tableView.contentSize.height 13 | } 14 | 15 | // MARK: PagerTableViewController 16 | 17 | class PagerTableViewController: UITableViewController { 18 | 19 | /// Observable disposeBag 20 | private let disposeBag = DisposeBag() 21 | 22 | /// wether we should show the animating cell or not 23 | private var showAnimatingCell = true 24 | 25 | /// tableview dataSource 26 | private var dataSource: [Int] = [] { 27 | didSet { 28 | tableView.reloadData() 29 | } 30 | } 31 | 32 | /// pager trigger 33 | private lazy var loadNextPageTrigger: Observable = { 34 | return self.tableView.rx.contentOffset 35 | .flatMap { (offset) -> Observable in 36 | isNearTheBottomEdge(offset, self.tableView) 37 | ? Observable.just(Void()) 38 | : Observable.empty() 39 | } 40 | }() 41 | 42 | /// Pager, that emit pages of [Int], and complete when last emitted int is greater than 100 43 | private lazy var page: Observable<[Int]> = { 44 | func nextPage(_ previousPage: [Int]?) -> Observable<[Int]> { 45 | let last = previousPage?.last ?? 0 46 | return Observable 47 | .just(Array(1...20).map { last + $0 }) 48 | .delaySubscription(.milliseconds(500), scheduler: MainScheduler.instance) 49 | } 50 | 51 | func hasNext(_ page: [Int]?) -> Bool { 52 | guard let last = page?.last else { return true } 53 | return last < 100 54 | } 55 | 56 | return Observable.page(make: nextPage, while: hasNext, when: self.loadNextPageTrigger) 57 | }() 58 | 59 | override func viewDidLoad() { 60 | super.viewDidLoad() 61 | 62 | // scan, and update dataSource 63 | page 64 | .scan([Int](), accumulator: +) 65 | .subscribe(onNext: { [weak self] in self?.dataSource = $0 }) 66 | .disposed(by: disposeBag) 67 | 68 | // update dataSource and reset the animating flag, when the stream complete 69 | page 70 | .subscribe(onCompleted: { [weak self] in 71 | self?.showAnimatingCell = false 72 | self?.tableView.reloadData() 73 | }) 74 | .disposed(by: disposeBag) 75 | } 76 | 77 | // MARK: UITableViewController methods 78 | 79 | override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 80 | return dataSource.count + (showAnimatingCell ? 1 : 0) 81 | } 82 | 83 | override func tableView(_ tableView: UITableView, 84 | cellForRowAt indexPath: IndexPath) -> UITableViewCell { 85 | let cell: UITableViewCell? 86 | 87 | if showAnimatingCell && indexPath.row == dataSource.count { 88 | cell = tableView.dequeueReusableCell(withIdentifier: "loadingCell") 89 | } else { 90 | cell = tableView.dequeueReusableCell(withIdentifier: "pagerCell") 91 | cell?.textLabel?.text = "Row \(dataSource[(indexPath as NSIndexPath).row])" 92 | } 93 | 94 | return cell! 95 | } 96 | } 97 | -------------------------------------------------------------------------------- /Example/RxPager/Base.lproj/LaunchScreen.xib: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | -------------------------------------------------------------------------------- /Example/RxPager.xcodeproj/xcshareddata/xcschemes/RxPager-Example.xcscheme: -------------------------------------------------------------------------------- 1 | 2 | 5 | 8 | 9 | 15 | 21 | 22 | 23 | 29 | 35 | 36 | 37 | 38 | 39 | 45 | 46 | 48 | 54 | 55 | 56 | 57 | 58 | 64 | 65 | 66 | 67 | 68 | 69 | 80 | 82 | 88 | 89 | 90 | 91 | 92 | 93 | 99 | 101 | 107 | 108 | 109 | 110 | 112 | 113 | 116 | 117 | 118 | -------------------------------------------------------------------------------- /Example/Tests/Tests.swift: -------------------------------------------------------------------------------- 1 | import UIKit 2 | import XCTest 3 | import RxSwift 4 | import RxPager 5 | import RxCocoa 6 | 7 | // MARK: Page 8 | 9 | /// a sample Page Data Struct 10 | struct Page { 11 | let values: [Int] 12 | let hasNext: Bool 13 | } 14 | 15 | // MARK: globals 16 | 17 | /// Delay block after `time` seconds. 18 | /// 19 | /// - Parameters: 20 | /// - time: The time to wait in seconds. 21 | /// - block: The block to executed after the delay. 22 | func delay(_ time: TimeInterval, block: @escaping () -> Void) { 23 | DispatchQueue.main.asyncAfter( 24 | deadline: .now() + Double(Int64(time * Double(NSEC_PER_SEC))) / Double(NSEC_PER_SEC), execute: block) 25 | } 26 | 27 | /// Create a `Page` pager that emits 4 pages and complete. 28 | /// 29 | /// - Returns: A tuple with the pager and the trigger. 30 | func createPager() -> Pager { 31 | let nextPage = { (previousPage: Page?) -> Observable in 32 | let last = previousPage?.values.last ?? 0 33 | return Observable.just(Page( 34 | values: [last + 1, last + 2, last + 3], 35 | hasNext: last + 3 < 10) 36 | ) 37 | } 38 | 39 | let hasNext = { (page: Page) -> Bool in 40 | return page.hasNext == true 41 | } 42 | 43 | return Pager(make: nextPage, while: hasNext) 44 | } 45 | 46 | /// Create a `Page` pager that emits 4 pages and complete. 47 | /// Each page is emitted asynchronously after a 0.1s delay 48 | /// 49 | /// - Returns: A tuple with the pager and the trigger 50 | func createASyncPager() -> Pager { 51 | 52 | let nextPage = { (previousPage: Page?) -> Observable in 53 | let last = previousPage?.values.last ?? 0 54 | return Observable.just(Page( 55 | values: [last + 1, last + 2, last + 3], 56 | hasNext: last + 3 < 10) 57 | ).delaySubscription(.milliseconds(100), scheduler: MainScheduler.instance) 58 | } 59 | 60 | let hasNext = { (page: Page) -> Bool in 61 | return page.hasNext == true 62 | } 63 | 64 | return Pager(make: nextPage, while: hasNext) 65 | } 66 | 67 | // MARK: Tests 68 | 69 | class Tests: XCTestCase { 70 | 71 | /// stream dispose bag 72 | var disposeBag = DisposeBag() 73 | 74 | override func tearDown() { 75 | // dispose current `disposeBag` and create a new one 76 | disposeBag = DisposeBag() 77 | } 78 | 79 | /// ensure that the first page is emitted 80 | func testGetFirstPage() { 81 | let expectation = self.expectation(description: "get first page") 82 | let pager = createPager() 83 | 84 | pager.page 85 | .subscribe(onNext: { page in 86 | XCTAssertEqual(page.values, [1, 2, 3]) 87 | expectation.fulfill() 88 | }) 89 | .disposed(by: disposeBag) 90 | 91 | waitForExpectations(timeout: 1, handler: nil) 92 | } 93 | 94 | /// ensure that the second page is emitted 95 | func testGetSecondPage() { 96 | let expectation = self.expectation(description: "get first two page") 97 | let pager = createPager() 98 | 99 | pager.page 100 | .skip(1) 101 | .subscribe(onNext: { page in 102 | XCTAssertEqual(page.values, [4, 5, 6]) 103 | expectation.fulfill() 104 | }) 105 | .disposed(by: disposeBag) 106 | 107 | pager.next() 108 | waitForExpectations(timeout: 1, handler: nil) 109 | } 110 | 111 | /// ensure that the third page is emitted 112 | func testGetThirdPage() { 113 | let expectation = self.expectation(description: "get first three page") 114 | let pager = createPager() 115 | 116 | pager.page 117 | .skip(2) 118 | .subscribe(onNext: { page in 119 | XCTAssertEqual(page.values, [7, 8, 9]) 120 | expectation.fulfill() 121 | }).disposed(by: disposeBag) 122 | 123 | pager.next() 124 | pager.next() 125 | waitForExpectations(timeout: 1, handler: nil) 126 | } 127 | 128 | /// ensure that the completed event is emitted 129 | func testCompletePager() { 130 | let expectation = self.expectation(description: "get completed event") 131 | let pager = createPager() 132 | 133 | pager.page.subscribe(onCompleted: { 134 | expectation.fulfill() 135 | }).disposed(by: disposeBag) 136 | 137 | // starts with [1, 2 ,3] 138 | pager.next() // [4, 5, 6] 139 | pager.next() // [7, 8, 9] 140 | pager.next() // [10, 11, 12], completed 141 | waitForExpectations(timeout: 1, handler: nil) 142 | } 143 | 144 | /// ensure next is a noop when called more than once between two pages emission 145 | func testCantNextMoreThanOnceBeforeNextPage() { 146 | let expectation = self.expectation(description: "get first two page") 147 | let pager = createASyncPager() 148 | 149 | pager.page 150 | .subscribe(onNext: { page in 151 | // should only be called once 152 | XCTAssertEqual(page.values, [1, 2, 3]) 153 | 154 | // wait for non event and fulfill 155 | delay(0.2) { expectation.fulfill() } 156 | }) 157 | .disposed(by: disposeBag) 158 | 159 | pager.next() // should be a noop 160 | pager.next() // should be a noop 161 | waitForExpectations(timeout: 1, handler: nil) 162 | } 163 | 164 | func testPageFromSequence() { 165 | var pages: [[Int]] = [] 166 | let arr = Array(0...10) 167 | let expected = [[0, 1], [2, 3], [4, 5], [6, 7], [8, 9], [10]] 168 | let expectation = self.expectation(description: "get pages from sequence") 169 | 170 | let trigger = PublishSubject() 171 | 172 | Observable 173 | .page(arr, by: 2, when: trigger) 174 | .subscribe( 175 | onNext: { 176 | pages.append($0) 177 | }, 178 | onCompleted: { 179 | XCTAssert(pages.count == expected.count) 180 | zip(pages, expected).forEach { XCTAssert($0 == $1) } 181 | expectation.fulfill() 182 | } 183 | ) 184 | .disposed(by: disposeBag) 185 | 186 | // start with [0, 1] 187 | trigger.onNext(()) // [2, 3] 188 | trigger.onNext(()) // [4, 5] 189 | trigger.onNext(()) // [6, 7] 190 | trigger.onNext(()) // [8, 9] 191 | trigger.onNext(()) // [10] 192 | waitForExpectations(timeout: 1, handler: nil) 193 | } 194 | } 195 | -------------------------------------------------------------------------------- /Example/RxPager/Base.lproj/Main.storyboard: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 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