update: review suggestions
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Danil Pavlov
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README.md
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README.md
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[](https://opensource.org/licenses/Apache-2.0)
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# Compose Multiplatform mobile application
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> **Note**
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> Compose Multiplatform is in Alpha. It may change incompatibly and require manual migration in the future.
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> We would appreciate your feedback on it in the public Slack channel [#compose-ios](https://kotlinlang.slack.com/archives/C0346LWVBJ4/p1678888063176359).
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> If you face any issues, please report them on [GitHub](https://github.com/JetBrains/compose-multiplatform/issues).
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You can use this template to start developing your own [Compose Multiplatform](https://github.com/JetBrains/compose-multiplatform) application.
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The result will be a Kotlin Multiplatform project targeting Android and iOS.
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You can use this template to start developing your own [Compose Multiplatform](https://github.com/JetBrains/compose-multiplatform) mobile application targeting Android and iOS.
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Follow out tutorial below to get your first Compose Multiplatform app up and running.
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The result will be a [Kotlin Multiplatform](https://kotlinlang.org/docs/multiplatform.html) project that uses Compose Multiplatform UI framework.
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## Set up an environment
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## Set up the environment
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> **Important**. You need a Mac with macOS to write and run iOS-specific code on simulated or real devices.
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> **Warning**
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> You need a Mac with macOS to write and run iOS-specific code on simulated or real devices.
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> This is an Apple requirement.
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To work with this template, you need the following:
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### Check your environment
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When you install all the tools, use the [KDoctor](https://github.com/Kotlin/kdoctor) tool to ensure that your development environment is configured correctly:
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Before you start, use the [KDoctor](https://github.com/Kotlin/kdoctor) tool to ensure that your development environment is configured correctly:
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1. Install KDoctor with [Homebrew](https://brew.sh/):
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@ -70,17 +75,17 @@ This `shared` module is also where you write your Compose Multiplatform code.
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In `shared/src/commonMain/kotlin/App.kt`, you can find the shared root `@Composable` function for your app.
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It uses Gradle as the build system. You can add dependencies and change settings in `shared/build.gradle.kts`.
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The shared module builds into an Android library and an iOS framework.
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The `shared` module builds into an Android library and an iOS framework.
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### androidApp
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This is a Kotlin module that builds into an Android application. It uses Gradle as the build system.
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The `androidApp` module depends on and uses the shared module as a regular Android library.
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The `androidApp` module depends on and uses the `shared` module as a regular Android library.
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### iosApp
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This is an Xcode project that builds into an iOS application.
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It depends on and uses the shared module as a CocoaPods dependency.
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It depends on and uses the `shared` module as a CocoaPods dependency.
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## Run your application
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@ -88,7 +93,7 @@ It depends on and uses the shared module as a CocoaPods dependency.
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To run your application on an Android emulator:
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1. Create an [Android virtual device](https://developer.android.com/studio/run/managing-avds#createavd).
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1. Ensure you have an Android virtual device available. Otherwise, [create one](https://developer.android.com/studio/run/managing-avds#createavd).
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2. In the list of run configurations, select `androidApp`.
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3. Choose your virtual device and click **Run**:
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#### Running on a real device
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You can run your Compose Multiplatform application on a real iOS device.
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To do that, you'll need the following:
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You can run your Compose Multiplatform application on a real iOS device for free.
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To do so, you'll need the following:
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* `TEAM_ID` associated with your [Apple ID](https://support.apple.com/en-us/HT204316)
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* The iOS device registered in Xcode
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> **Note**
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> Before you continue, we suggest creating a simple "Hello, world!" project in Xcode to ensure you can successfully run apps on your device.
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> You can follow the instructions below or watch this [this Standford CS193P lecture recording](https://youtu.be/bqu6BquVi2M?start=716&end=1399).
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>
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@ -181,6 +187,8 @@ To run the application, set the `TEAM_ID`:
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## Make your first changes
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You can now make some changes in the code and see that they will be visible in both iOS and Android applications at once:
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1. In Android Studio, navigate to the `shared/src/commonMain/kotlin/App.kt` file.
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It's the common entry point for your Compose Multiplatform app.
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@ -189,7 +197,7 @@ To run the application, set the `TEAM_ID`:
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```kotlin
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@OptIn(ExperimentalResourceApi::class)
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@Composable
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internal fun App() {
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fun App() {
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MaterialTheme {
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var greetingText by remember { mutableStateOf("Hello, World!") }
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var showImage by remember { mutableStateOf(false) }
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@ -216,7 +224,7 @@ To run the application, set the `TEAM_ID`:
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```diff
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@OptIn(ExperimentalResourceApi::class)
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@Composable
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internal fun App() {
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fun App() {
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MaterialTheme {
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var greetingText by remember { mutableStateOf("Hello, World!") }
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var showImage by remember { mutableStateOf(false) }
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@ -245,8 +253,8 @@ To run the application, set the `TEAM_ID`:
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## How to configure the iOS application
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You can further configure the basic properties of your iOS app using this template without opening Xcode.
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In Android Studio, navigate to the `iosApp/Configuration/Config.xcconfig` configuration file. It contains:
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To get a better understanding of this template's setup and learn how to configure the basic properties of your iOS app without Xcode,
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open the `iosApp/Configuration/Config.xcconfig` file in Android Studio. The configuration file contains:
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* `APP_NAME`, a target executable and an application bundle name
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* `BUNDLE_ID` that [uniquely identifies the app throughout the system](https://developer.apple.com/documentation/bundleresources/information_property_list/cfbundleidentifier#discussion)
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@ -263,3 +271,11 @@ If you need to change this option after you open the project in Android Studio,
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To configure advanced settings, use Xcode. After opening the project in Android Studio,
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go to Xcode and open the `iosApp/iosApp.xcworkspace` file, and make changes.
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## Next steps
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We encourage you to further explore Compose Multiplatform and try out more projects:
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* [Learn about other cases where you can use the Compose Multiplatform UI framework](https://github.com/JetBrains/compose-multiplatform)
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* [Complete more Compose Multiplatform tutorials](https://github.com/JetBrains/compose-multiplatform#tutorials)
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* [Explore some more advanced Compose Multiplatform example projects](https://github.com/JetBrains/compose-multiplatform#examples)
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