iOS SDK如何调用Lambda函数？

import AWSCore
import AWSCognitoIdentityProvider
import AWSLambda

// 配置AWS Mobile SDK
let credentialsProvider = AWSCognitoCredentialsProvider(regionType: .USEast1, identityPoolId: "YOUR_IDENTITY_POOL_ID")
let configuration = AWSServiceConfiguration(region: .USEast1, credentialsProvider: credentialsProvider)
AWSServiceManager.default().defaultServiceConfiguration = configuration

// 创建Lambda客户端
let lambdaClient = AWSLambda.default()

// 创建调用Lambda函数的请求
let request = AWSLambdaInvocationRequest()
request.functionName = "YOUR_LAMBDA_FUNCTION_NAME"
request.payload = "YOUR_PAYLOAD"

// 调用Lambda函数
lambdaClient.invoke(request) { (response, error) in
    if let error = error {
        print("调用Lambda函数出错：\(error.localizedDescription)")
    } else if let response = response {
        if let payload = response.payload {
            print("Lambda函数返回结果：\(payload)")
        }
    }
}