kotlin-multiplatform

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Original

English

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Translation

Chinese

Kotlin Multiplatform Skill

Kotlin Multiplatform 技能指南

Build cross-platform applications with shared Kotlin code.

使用共享Kotlin代码构建跨平台应用程序。

Topics Covered

涵盖主题

Project Setup

项目设置

kotlin

kotlin {
    androidTarget()
    listOf(iosX64(), iosArm64(), iosSimulatorArm64()).forEach {
        it.binaries.framework { baseName = "Shared"; isStatic = true }
    }
    sourceSets {
        commonMain.dependencies {
            implementation("io.ktor:ktor-client-core:2.3.8")
        }
        androidMain.dependencies { implementation("io.ktor:ktor-client-okhttp:2.3.8") }
        iosMain.dependencies { implementation("io.ktor:ktor-client-darwin:2.3.8") }
    }
}

kotlin

kotlin {
    androidTarget()
    listOf(iosX64(), iosArm64(), iosSimulatorArm64()).forEach {
        it.binaries.framework { baseName = "Shared"; isStatic = true }
    }
    sourceSets {
        commonMain.dependencies {
            implementation("io.ktor:ktor-client-core:2.3.8")
        }
        androidMain.dependencies { implementation("io.ktor:ktor-client-okhttp:2.3.8") }
        iosMain.dependencies { implementation("io.ktor:ktor-client-darwin:2.3.8") }
    }
}

expect/actual

kotlin

// commonMain
expect class SecureStorage { fun get(key: String): String? }

// androidMain
actual class SecureStorage { actual fun get(key: String) = prefs.getString(key, null) }

// iosMain
actual class SecureStorage { actual fun get(key: String) = KeychainWrapper.get(key) }

kotlin

// commonMain
expect class SecureStorage { fun get(key: String): String? }

// androidMain
actual class SecureStorage { actual fun get(key: String) = prefs.getString(key, null) }

// iosMain
actual class SecureStorage { actual fun get(key: String) = KeychainWrapper.get(key) }

Troubleshooting

问题排查

Issue	Resolution
"No actual for expect"	Add implementation in platform source set
iOS framework not found	Run linkDebugFrameworkIos task

问题	解决方法
"No actual for expect"	在平台源码集中添加实现
iOS framework not found	运行linkDebugFrameworkIos任务

Usage

使用方法

Skill("kotlin-multiplatform")

Skill("kotlin-multiplatform")