如何在KMM项目iOS端调用共享模块的Apollo Client登录方法？

关键问题分析 #

你的崩溃主要来自三个核心问题：自定义类名与Apollo库类名冲突、iOS端直接调用Kotlin suspend函数的线程适配错误、网络请求未指定正确的后台调度器。以下是具体修复步骤：

1. 修正共享模块的核心代码 #

首先重命名自定义类避免与Apollo库的ApolloClient冲突，并为iOS添加专用异步调用接口：

import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.SupervisorJob
import kotlinx.coroutines.coroutineScope
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext

data class User(val email: String?, val password: String?)

// 重命名自定义类，避免和Apollo库的ApolloClient类冲突
class GraphQLClient {
    private val apolloClient = com.apollographql.apollo3.ApolloClient.Builder()
        .serverUrl("http://10.0.2.2:4000/graphql")
        .build()
    
    // 为iOS创建专用协程作用域，确保线程调度安全
    private val iosCoroutineScope = kotlinx.coroutines.CoroutineScope(Dispatchers.Main + SupervisorJob())

    // 核心suspend登录方法，指定IO调度器执行网络请求
    suspend fun loginUser(email: String, password: String): User = withContext(Dispatchers.IO) {
        val response = apolloClient.query(LoginUserWithEmailAndPasswordQuery(email = email, password = password)).execute()
        val userEmail = response.data?.loginUser?.email
        val userPassword = response.data?.loginUser?.password
        User(userEmail, userPassword)
    }

    // iOS专用异步调用接口，用闭包返回结果
    fun loginUserForIOS(email: String, password: String, completion: (Result<User>) -> Unit) {
        iosCoroutineScope.launch {
            try {
                val user = loginUser(email, password)
                completion(Result.success(user))
            } catch (e: Exception) {
                completion(Result.failure(e))
            }
        }
    }
}

2. iOS端正确调用异步接口 #

修改iOS代码，使用包装后的异步方法，避免直接调用suspend函数：

import shared

private var graphQLClient = GraphQLClient()

// 在合适的业务逻辑中调用登录方法
graphQLClient.loginUserForIOS(email: "your_email", password: "your_password") { result in
    switch result {
    case .success(let user):
        // 处理登录成功逻辑
        print("登录成功：\(user.email ?? "无邮箱")")
    case .failure(let error):
        // 处理登录失败逻辑
        print("登录出错：\(error.localizedDescription)")
    }
}

3. 确认共享模块依赖配置 #

确保build.gradle.kts（共享模块）中已添加正确的协程和Apollo依赖：

kotlin {
    sourceSets {
        val commonMain by getting {
            dependencies {
                implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.7.3")
                implementation("com.apollographql.apollo3:apollo-runtime:3.8.2")
            }
        }
        val iosMain by getting {
            dependencies {
                implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.7.3")
            }
        }
    }
}

内容的提问来源于stack exchange，提问作者Luluxlu