Sharing Kotlin Code across platforms

Transcript

1. Kotlin/Multiplatform Sharing Kotlin code across platforms
2. App Code
3. App Presentation Domain Data
4. Presentation Domain Data Desktop Presentation Domain Data iOS Presentation Domain Data Web Presentation Domain Data Android
5. Desktop Presentation Domain Data iOS Web Android
6. Desktop Presentation Domain Data iOS Web Android Platform Bridge
9. Desktop Presentation Domain Data iOS Web Android Platform Bridge
10. Desktop Domain Data iOS Web Android Platform Bridge Presentation Presentation Presentation Presentation
11. Why use Kotlin Multiplatform over Cross-platform frameworks?
12. Native Kotlin Multiplatform Cross-platform Code sharing None Partial Full Platform targets Specific Any Depends on framework Performance Native Native Depends on framework Development Cost Highest Higher High Access to platform APIs Yes Yes Depends on framework Time to market Slowest Average Fastest
13. What can you share?
14. Presentation Domain Data Desktop Presentation Domain Data iOS Presentation Domain Data Web Presentation Domain Data Android
15. Presentation Data Desktop Presentation Domain Data iOS Presentation Data Web Presentation Data Android
16. Presentation Desktop Presentation Domain Data iOS Presentation Web Presentation Android
17. Desktop Domain Data iOS Web Android Common Presentation Presentation Presentation Presentation Presentation
18. Desktop Domain Entities, Use Cases / Interactors Data Repositories, HTTP Clients, Cache iOS Web Android Common Presentation View Models, Presenters, Controllers Presentation Presentation Presentation Presentation
19. How does it work?
20. Kotlin Compiler Native JS JVM
21. Kotlin Compiler Native JS JVM JAR / AAR Binaries JS
22. Android Backend Desktop Web Backend Android iOS Desktop Native JS JVM
23. expect / actual
24. // common.kt expect fun platformName(): String // actual-android.kt actual fun platformName(): String = "Android" // actual-ios.kt actual fun platformName(): String = "iOS" // actual-jvm.kt actual fun platformName(): String = "JVM"
25. // common.kt expect fun platformName(): String // actual-android.kt actual fun platformName(): String = "Android" // actual-ios.kt actual fun platformName(): String = "iOS" // actual-jvm.kt actual fun platformName(): String = "JVM"
26. // remote-source.kt expect class RemoteSource { fun fetchFromServer(): List<Item> } // android-remote-source.kt actual class RemoteSource { fun fetchFromServer(): List<Item> { // Retrofit } } // ios-remote-source.kt actual class RemoteSource { fun fetchFromServer(): List<Item> { // AlamoFire / NSURLSession } }
27. // remote-source.kt expect class RemoteSource { fun fetchFromServer(): List<Item> } // android-remote-source.kt actual class RemoteSource { fun fetchFromServer(): List<Item> { // Retrofit } } // ios-remote-source.kt actual class RemoteSource { fun fetchFromServer(): List<Item> { // AlamoFire / NSURLSession } }
28. Specifying Platform Targets
29. apply plugin: "org.jetbrains.kotlin.multiplatform" kotlin { targets { android(“android") jvm(“desktop") fromPreset(presets.iosX64, 'ios') { binaries { framework(“Common") } } } }
30. apply plugin: "org.jetbrains.kotlin.multiplatform" kotlin { targets { android(“android") jvm(“desktop") fromPreset(presets.iosX64, 'ios') { binaries { framework(“Common") } } } }
31. apply plugin: "org.jetbrains.kotlin.multiplatform" kotlin { targets { android(“android") jvm(“desktop") fromPreset(presets.iosX64, 'ios') { binaries { framework(“Common") } } } }
32. apply plugin: "org.jetbrains.kotlin.multiplatform" kotlin { targets { android(“android") jvm(“desktop") fromPreset(presets.iosX64, 'ios') { binaries { framework(“Common") } } } }
33. Platform Targets
34. apply plugin: "org.jetbrains.kotlin.multiplatform" kotlin { targets { ... } sourceSets { iosMain { dependencies { ... } } commonMain { dependencies { ... } } } }
35. Multiplatform Libraries
36. Multiplatform Libraries • HTTP Clients ◦ Ktor • JSON Serialization ◦ Kotlin Serialization • Storage ◦ SQLDelight • Dependency Injection ◦ Kodein • Asynchronous Code ◦ Kotlin Coroutines
37. // settings.gradle enableFeaturePreview("GRADLE_METADATA") include ":app", ":multiplatform"
39. private val client = HttpClient(clientEngine) client.post("https://my.api.url/path/get") client.get<String>("https://my.api.url/path/post") client.call { method = HttpMethod.Post, url = "https://my.api.url/path/get", body = PostRequestBody(...) } client.request<String> { method = HttpMethod.Post, url = "myurl" }
40. private val client = HttpClient(clientEngine) client.post("https://my.api.url/path/get") client.get<String>("https://my.api.url/path/post") client.call { method = HttpMethod.Post, url = "https://my.api.url/path/get", body = PostRequestBody(...) } client.request<String> { method = HttpMethod.Post, url = "myurl" }
41. private val client = HttpClient(clientEngine) client.post("https://my.api.url/path/get") client.get<String>("https://my.api.url/path/post") client.call { method = HttpMethod.Post, url = "https://my.api.url/path/get", body = PostRequestBody(...) } client.request<String> { method = HttpMethod.Post, url = "myurl" }
42. private val client = HttpClient(clientEngine) client.post("https://my.api.url/path/get") client.get<String>("https://my.api.url/path/post") client.call { method = HttpMethod.Post, url = "https://my.api.url/path/get", body = PostRequestBody(...) } client.request<String> { method = HttpMethod.Post, url = "myurl" }
44. @Serializable data class Data(val a: Int, val b: String = "42") val json = Json(JsonConfiguration.Stable) // Serialization val jsonData = json.stringify(Data.serializer(), Data(42)) val jsonList = json.stringify( Data.serializer().list, listOf(Data(42)) ) // Deserialization val data = json.parse(Data.serializer(), """{"a":42}""")
45. @Serializable data class Data(val a: Int, val b: String = "42") val json = Json(JsonConfiguration.Stable) // Serialization val jsonData = json.stringify(Data.serializer(), Data(42)) val jsonList = json.stringify( Data.serializer().list, listOf(Data(42)) ) // Deserialization val data = json.parse(Data.serializer(), """{"a":42}""")
46. @Serializable data class Data(val a: Int, val b: String = "42") val json = Json(JsonConfiguration.Stable) // Serialization val jsonData = json.stringify(Data.serializer(), Data(42)) val jsonList = json.stringify( Data.serializer().list, listOf(Data(42)) ) // Deserialization val data = json.parse(Data.serializer(), """{"a":42}""")
47. @Serializable data class Data(val a: Int, val b: String = "42") val json = Json(JsonConfiguration.Stable) // Serialization val jsonData = json.stringify(Data.serializer(), Data(42)) val jsonList = json.stringify( Data.serializer().list, listOf(Data(42)) ) // Deserialization val data = json.parse(Data.serializer(), """{"a":42}""")
48. @Serializable data class Data(val a: Int, val b: String = "42") val json = Json(JsonConfiguration.Stable) // Serialization val jsonData = json.stringify(Data.serializer(), Data(42)) val jsonList = json.stringify( Data.serializer().list, listOf(Data(42)) ) // Deserialization val data = json.parse(Data.serializer(), """{"a":42}""")
49. SQLDelight
50. CREATE TABLE MyObject ( id INTEGER NOT NULL, myText TEXT NOT NULL, myOtherText TEXT NOT NULL ); getAllMyObjects: SELECT * FROM MyObject; insetMyObject: INSERT INTO MyObject (id, myText, myOtherText) VALUES ?;
51. CREATE TABLE MyObject ( id INTEGER NOT NULL, myText TEXT NOT NULL, myOtherText TEXT NOT NULL ); getAllMyObjects: SELECT * FROM MyObject; insetMyObject: INSERT INTO MyObject (id, myText, myOtherText) VALUES ?;
52. CREATE TABLE MyObject ( id INTEGER NOT NULL, myText TEXT NOT NULL, myOtherText TEXT NOT NULL ); getAllMyObjects: SELECT * FROM MyObject; insetMyObject: INSERT INTO MyObject (id, myText, myOtherText) VALUES ?;
53. // Generated by SQLDelight fun getAllMyObjects(): Query<MyObject> fun insertMyObject(myObject: MyObject) // Repository.kt val myDb = AndroidSqliteDriver( MyDatabase.Schema, context, "mydb.db" ) // NativeSqliteDriver for Native fun getAllMyObjects(): List<MyObject> { return myDb.getAllMyObjects().executeAsList() }
54. // Generated by SQLDelight fun getAllMyObjects(): Query<MyObject> fun insertMyObject(myObject: MyObject) // Repository.kt val myDb = AndroidSqliteDriver( MyDatabase.Schema, context, "mydb.db" ) // NativeSqliteDriver for Native fun getAllMyObjects(): List<MyObject> { return myDb.getAllMyObjects().executeAsList() }
55. // Generated by SQLDelight fun getAllMyObjects(): Query<MyObject> fun insertMyObject(myObject: MyObject) // Repository.kt val myDb = AndroidSqliteDriver( MyDatabase.Schema, context, "mydb.db" ) // NativeSqliteDriver for Native fun getAllMyObjects(): List<MyObject> { return myDb.getAllMyObjects().executeAsList() }
56. Demo
57. apply plugin: "com.android.library" apply plugin: “org.jetbrains.kotlin.multiplatform" android { … } kotlin { targets { … } sourceSets { … } }
58. apply plugin: "com.android.library" apply plugin: “org.jetbrains.kotlin.multiplatform" android { … } kotlin { targets { … } sourceSets { … } }
59. apply plugin: "com.android.library" apply plugin: “org.jetbrains.kotlin.multiplatform" android { … } kotlin { targets { … } sourceSets { … } }
60. kotlin { targets { // iOS target platform depending on Xcode environment def iosPreset = System.getenv("SDK_NAME")?.startsWith("iphoneos") ? presets.iosArm64 : presets.iosX64 fromPreset(iosPreset, 'ios') { binaries { framework("Common") { if (iosPreset == presets.iosX64) { embedBitcode("disable") } } } } android("android") } sourceSets { … } }
61. kotlin { targets { // iOS target platform depending on Xcode environment def iosPreset = System.getenv("SDK_NAME")?.startsWith("iphoneos") ? presets.iosArm64 : presets.iosX64 fromPreset(iosPreset, 'ios') { binaries { framework("Common") { if (iosPreset == presets.iosX64) { embedBitcode("disable") } } } } android("android") } sourceSets { … } }
62. kotlin { targets { // iOS target platform depending on Xcode environment def iosPreset = System.getenv("SDK_NAME")?.startsWith("iphoneos") ? presets.iosArm64 : presets.iosX64 fromPreset(iosPreset, 'ios') { binaries { framework("Common") { if (iosPreset == presets.iosX64) { embedBitcode("disable") } } } } android("android") } sourceSets { … } }
63. kotlin { targets { // iOS target platform depending on Xcode environment def iosPreset = System.getenv("SDK_NAME")?.startsWith("iphoneos") ? presets.iosArm64 : presets.iosX64 fromPreset(iosPreset, 'ios') { binaries { framework("Common") { if (iosPreset == presets.iosX64) { embedBitcode("disable") } } } } android("android") } sourceSets { … } }
64. android { … } dependencies { … } kotlin { targets { … } sourceSets { iosMain { dependencies { … } } commonMain { dependencies { … } } } }
65. android { … } dependencies { … } kotlin { targets { … } sourceSets { iosMain { dependencies { … } } commonMain { dependencies { … } } } }
66. Platform Targets
67. class GetJokes( private val jokesRepository: JokesRepository ) { suspend operator fun invoke() = jokesRepository.getJokes() } interface JokesRepository { suspend fun getJokes(): List<Joke> } Common Code - Domain
68. class GetJokes( private val jokesRepository: JokesRepository ) { suspend operator fun invoke() = jokesRepository.getJokes() } interface JokesRepository { suspend fun getJokes(): List<Joke> } Common Code - Domain
69. class GetJokes( private val jokesRepository: JokesRepository ) { suspend operator fun invoke() = jokesRepository.getJokes() } interface JokesRepository { suspend fun getJokes(): List<Joke> } Common Code - Domain
70. class JokesRepositoryImpl( private val jokesRemoteSource: JokesRemoteSource, private val jokesLocalSource: JokesLocalSource ) : JokesRepository { override suspend fun getJokes(): List<Joke> { try { fetchJokes() } catch (exception: Exception) { println("Repository Error: ${exception.message}") } finally { return jokesLocalSource.getJokes() } } private suspend fun fetchJokes() { val jokes = jokesRemoteSource.getJokes() jokesLocalSource.saveJokes(jokes) } } Common Code - Data - Jokes Repository
71. class JokesRepositoryImpl( private val jokesRemoteSource: JokesRemoteSource, private val jokesLocalSource: JokesLocalSource ) : JokesRepository { override suspend fun getJokes(): List<Joke> { try { fetchJokes() } catch (exception: Exception) { println("Repository Error: ${exception.message}") } finally { return jokesLocalSource.getJokes() } } private suspend fun fetchJokes() { val jokes = jokesRemoteSource.getJokes() jokesLocalSource.saveJokes(jokes) } } Common Code - Data - Jokes Repository
72. class JokesRepositoryImpl( private val jokesRemoteSource: JokesRemoteSource, private val jokesLocalSource: JokesLocalSource ) : JokesRepository { override suspend fun getJokes(): List<Joke> { try { fetchJokes() } catch (exception: Exception) { println("Repository Error: ${exception.message}") } finally { return jokesLocalSource.getJokes() } } private suspend fun fetchJokes() { val jokes = jokesRemoteSource.getJokes() jokesLocalSource.saveJokes(jokes) } } Common Code - Data - Jokes Repository
73. class JokesRepositoryImpl( private val jokesRemoteSource: JokesRemoteSource, private val jokesLocalSource: JokesLocalSource ) : JokesRepository { override suspend fun getJokes(): List<Joke> { try { fetchJokes() } catch (exception: Exception) { println("Repository Error: ${exception.message}") } finally { return jokesLocalSource.getJokes() } } private suspend fun fetchJokes() { val jokes = jokesRemoteSource.getJokes() jokesLocalSource.saveJokes(jokes) } } Common Code - Data - Jokes Repository
74. class JokesRepositoryImpl( private val jokesRemoteSource: JokesRemoteSource, private val jokesLocalSource: JokesLocalSource ) : JokesRepository { override suspend fun getJokes(): List<Joke> { try { fetchJokes() } catch (exception: Exception) { println("Repository Error: ${exception.message}") } finally { return jokesLocalSource.getJokes() } } private suspend fun fetchJokes() { val jokes = jokesRemoteSource.getJokes() jokesLocalSource.saveJokes(jokes) } } Common Code - Data - Jokes Repository
75. class JokesRepositoryImpl( private val jokesRemoteSource: JokesRemoteSource, private val jokesLocalSource: JokesLocalSource ) : JokesRepository { override suspend fun getJokes(): List<Joke> { try { fetchJokes() } catch (exception: Exception) { println("Repository Error: ${exception.message}") } finally { return jokesLocalSource.getJokes() } } private suspend fun fetchJokes() { val jokes = jokesRemoteSource.getJokes() jokesLocalSource.saveJokes(jokes) } } Common Code - Data - Jokes Repository
76. expect val engine: HttpClientEngine class JokesRemoteSource(clientEngine: HttpClientEngine) { private val client = HttpClient(clientEngine) { install(JsonFeature) { serializer = KotlinxSerializer().apply { register(Joke.serializer().list) } } } suspend fun getJokes(): List<Joke> = client.get( “https://official-joke-api.appspot.com/jokes/ten" ) } Common Code - Data - Jokes Remote Source
77. expect val engine: HttpClientEngine class JokesRemoteSource(clientEngine: HttpClientEngine) { private val client = HttpClient(clientEngine) { install(JsonFeature) { serializer = KotlinxSerializer().apply { register(Joke.serializer().list) } } } suspend fun getJokes(): List<Joke> = client.get( “https://official-joke-api.appspot.com/jokes/ten" ) } Common Code - Data - Jokes Remote Source
78. expect val engine: HttpClientEngine // Android actual val engine by lazy { OkHttp.create { val networkInterceptor = HttpLoggingInterceptor() .apply { level = HttpLoggingInterceptor.Level.BODY } addNetworkInterceptor(networkInterceptor) } } // iOS import io.ktor.client.engine.ios.Ios actual val engine by lazy { Ios.create() } Common Code - Data - Jokes Remote Source
79. expect val engine: HttpClientEngine // Android actual val engine by lazy { OkHttp.create { val networkInterceptor = HttpLoggingInterceptor() .apply { level = HttpLoggingInterceptor.Level.BODY } addNetworkInterceptor(networkInterceptor) } } // iOS import io.ktor.client.engine.ios.Ios actual val engine by lazy { Ios.create() } Common Code - Data - Jokes Remote Source
80. expect val engine: HttpClientEngine // Android actual val engine by lazy { OkHttp.create { val networkInterceptor = HttpLoggingInterceptor() .apply { level = HttpLoggingInterceptor.Level.BODY } addNetworkInterceptor(networkInterceptor) } } // iOS import io.ktor.client.engine.ios.Ios actual val engine by lazy { Ios.create() } Common Code - Data - Jokes Remote Source
81. class JokesRemoteSource(clientEngine: HttpClientEngine) { private val client = HttpClient(clientEngine) { install(JsonFeature) { serializer = KotlinxSerializer().apply { register(Joke.serializer().list) } } } suspend fun getJokes(): List<Joke> = client.get( “https://official-joke-api.appspot.com/jokes/ten" ) } Common Code - Data - Jokes Remote Source
82. class JokesRemoteSource(clientEngine: HttpClientEngine) { private val client = HttpClient(clientEngine) { install(JsonFeature) { serializer = KotlinxSerializer().apply { register(Joke.serializer().list) } } } suspend fun getJokes(): List<Joke> = client.get( “https://official-joke-api.appspot.com/jokes/ten" ) } Common Code - Data - Jokes Remote Source
83. class JokesRemoteSource(clientEngine: HttpClientEngine) { private val client = HttpClient(clientEngine) { install(JsonFeature) { serializer = KotlinxSerializer().apply { register(Joke.serializer().list) } } } suspend fun getJokes(): List<Joke> = client.get( “https://official-joke-api.appspot.com/jokes/ten" ) } Common Code - Data - Jokes Remote Source
84. class JokesLocalSource { var driver: SqlDriver? = JokesDatabaseDriver.jokesDatabaseDriver private val db by lazy { val driver = requireNotNull(driver) { "No SqlDriver found!" } JokesDatabase.invoke(driver).jokeQueries } fun getJokes(): List<Joke> { return db.getAllJokes().executeAsList() } fun saveJokes(jokes: List<Joke>) { jokes.forEach { db.insertJoke(it) } } } Common Code - Data - Jokes Local Source
85. class JokesLocalSource { var driver: SqlDriver? = JokesDatabaseDriver.jokesDatabaseDriver private val db by lazy { val driver = requireNotNull(driver) { "No SqlDriver found!" } JokesDatabase.invoke(driver).jokeQueries } fun getJokes(): List<Joke> { return db.getAllJokes().executeAsList() } fun saveJokes(jokes: List<Joke>) { jokes.forEach { db.insertJoke(it) } } } Common Code - Data - Jokes Local Source
86. expect object JokesDatabaseDriver { var jokesDatabaseDriver: SqlDriver? } // Android actual object JokesDatabaseDriver { actual var jokesDatabaseDriver: SqlDriver? = null fun createDriver(context: Context) { jokesDatabaseDriver = AndroidSqliteDriver(JokesDatabase.Schema, context, "jokes.db") } } // iOS actual object JokesDatabaseDriver { actual var jokesDatabaseDriver: SqlDriver? = NativeSqliteDriver(JokesDatabase.Schema, "jokes.db") } Common Code - Data - Jokes Local Source
87. expect object JokesDatabaseDriver { var jokesDatabaseDriver: SqlDriver? } // Android actual object JokesDatabaseDriver { actual var jokesDatabaseDriver: SqlDriver? = null fun createDriver(context: Context) { jokesDatabaseDriver = AndroidSqliteDriver(JokesDatabase.Schema, context, "jokes.db") } } // iOS actual object JokesDatabaseDriver { actual var jokesDatabaseDriver: SqlDriver? = NativeSqliteDriver(JokesDatabase.Schema, "jokes.db") } Common Code - Data - Jokes Local Source
88. expect object JokesDatabaseDriver { var jokesDatabaseDriver: SqlDriver? } // Android actual object JokesDatabaseDriver { actual var jokesDatabaseDriver: SqlDriver? = null fun createDriver(context: Context) { jokesDatabaseDriver = AndroidSqliteDriver(JokesDatabase.Schema, context, "jokes.db") } } // iOS actual object JokesDatabaseDriver { actual var jokesDatabaseDriver: SqlDriver? = NativeSqliteDriver(JokesDatabase.Schema, "jokes.db") } Common Code - Data - Jokes Local Source
89. class JokesLocalSource { var driver: SqlDriver? = JokesDatabaseDriver.jokesDatabaseDriver private val db by lazy { val driver = requireNotNull(driver) { "No SqlDriver found!" } JokesDatabase.invoke(driver).jokeQueries } fun getJokes(): List<Joke> { return db.getAllJokes().executeAsList() } fun saveJokes(jokes: List<Joke>) { jokes.forEach { db.insertJoke(it) } } } Common Code - Data - Jokes Local Source
90. class JokesLocalSource { var driver: SqlDriver? = JokesDatabaseDriver.jokesDatabaseDriver private val db by lazy { val driver = requireNotNull(driver) { "No SqlDriver found!" } JokesDatabase.invoke(driver).jokeQueries } fun getJokes(): List<Joke> { return db.getAllJokes().executeAsList() } fun saveJokes(jokes: List<Joke>) { jokes.forEach { db.insertJoke(it) } } } Common Code - Data - Jokes Local Source
91. CREATE TABLE JokeDb ( id INTEGER NOT NULL, setup TEXT NOT NULL, punchline TEXT NOT NULL, type TEXT NOT NULL ); getAllJokes: SELECT * FROM JokeDb; insertJoke: INSERT INTO JokeDb (id, setup, punchline, type) VALUES ?; Common Code - Data - Jokes Local Source
92. @ThreadLocal object ServiceLocator { val jokesLocalSource = JokesLocalSource() val jokesRemoteSource = JokesRemoteSource(engine) val jokesRepository: JokesRepository = JokesRepositoryImpl(jokesRemoteSource, jokesLocalSource) val getJokes = GetJokes(jokesRepository) } Common Code - Dependency Injection
93. @ThreadLocal object ServiceLocator { val jokesLocalSource = JokesLocalSource() val jokesRemoteSource = JokesRemoteSource(engine) val jokesRepository: JokesRepository = JokesRepositoryImpl(jokesRemoteSource, jokesLocalSource) val getJokes = GetJokes(jokesRepository) } Common Code - Dependency Injection
94. class JokesViewModel( private val getJokes: GetJokes ) : ViewModel() { private val _jokes = MutableLiveData<List<Joke>>() val jokes: LiveData<List<Joke>> = _jokes init { viewModelScope.launch { _jokes.value = getJokes() } } } Android Code - Presentation
95. class JokesViewModel( private val getJokes: GetJokes ) : ViewModel() { private val _jokes = MutableLiveData<List<Joke>>() val jokes: LiveData<List<Joke>> = _jokes init { viewModelScope.launch { _jokes.value = getJokes() } } } Android Code - Presentation
96. class JokesFragment : Fragment(R.layout.fragment_jokes) { private val viewModel: JokesViewModel by viewModels { JokesViewModelFactory(ServiceLocator.getJokes) } private val jokesAdapter by lazy { JokesListAdapter() } override fun onViewCreated(view: View, savedInstanceState: Bundle?) { // Assign RecyclerView to Adapter viewModel.jokes.observe(viewLifecycleOwner, Observer { jokesAdapter.submitList(it) }) } } Android Code - Presentation
97. class JokesPresenter( private val jokesView: JokesView, private val getJokes: GetJokes ) { val presenterJob = SupervisorJob() val presenterScope: CoroutineScope = CoroutineScope(defaultDispatcher + presenterJob) fun getJokes() { presenterScope.launch { val jokes = getJokes.invoke() jokesView.showJokes(jokes) } } } iOS Code - Presentation
98. class JokesPresenter( private val jokesView: JokesView, private val getJokes: GetJokes ) { val presenterJob = SupervisorJob() val presenterScope: CoroutineScope = CoroutineScope(defaultDispatcher + presenterJob) fun getJokes() { presenterScope.launch { val jokes = getJokes.invoke() jokesView.showJokes(jokes) } } } iOS Code - Presentation
99. class ViewController: UITableViewController, JokesView { // MARK: Properties var jokes = [Joke]() // MARK: JokesView func showJokes(jokes: [Joke]) { self.jokes += jokes tableView.reloadData() } override func viewDidLoad() { let presenter = JokesPresenter.init( jokesView: self, getJokes: ServiceLocator.init().getJokes ) presenter.getJokes() } } iOS Code - Presentation
100. class ViewController: UITableViewController, JokesView { // MARK: Properties var jokes = [Joke]() // MARK: JokesView func showJokes(jokes: [Joke]) { self.jokes += jokes tableView.reloadData() } override func viewDidLoad() { let presenter = JokesPresenter.init( jokesView: self, getJokes: ServiceLocator.init().getJokes ) presenter.getJokes() } } iOS Code - Presentation
101. Gotchas • Tedious to set up • Lack of libraries in Multiplatform projects • IDE Support • Kotlin/Native still in Beta • Multiplatform is still experimental