AWS iOS SDK for iOS 开发指南
项目概述
AWS iOS SDK 是一个功能完整的移动开发框架,让开发者能够轻松地将 AWS 云服务集成到 iOS 应用程序中。该 SDK 提供了对 AWS 核心服务的原生支持,包括身份认证、数据存储、API 调用、推送通知等功能,帮助开发者快速构建安全、可扩展的移动应用。
⚠️ 重要通知:AWS SDK for iOS 已于 2025 年 8 月 1 日进入维护阶段,建议新项目使用 AWS Amplify for Swift。
功能特性
核心服务集成
- 身份认证:支持 Amazon Cognito 用户池和身份池,提供完整的用户生命周期管理
- 数据存储:与 Amazon S3、DynamoDB 无缝集成,实现安全的数据存储和同步
- API 网关:简化 REST API 调用,支持自动签名和错误处理
- 推送通知:通过 Amazon Pinpoint 实现精准的消息推送
第三方登录支持
- Facebook 登录:集成 Facebook SDK,支持社交账号登录
- Google 登录:提供 Google Sign-In 完整集成方案
- Apple 登录:支持 Sign in with Apple,符合 App Store 审核要求
- 自定义身份提供商:可扩展架构支持自定义认证流程
开发体验优化
- Swift Package Manager 支持,简化依赖管理
- 模块化设计,按需导入所需服务组件
- 完整的类型定义,提供良好的代码提示和类型安全
- 详细的错误处理,包含丰富的错误码和恢复建议
安装指南
Swift Package Manager 安装
- 在 Xcode 项目中,选择 File > Add Packages
- 输入仓库地址:
https://github.com/aws-amplify/aws-sdk-ios-spm - 选择需要集成的服务模块
基本依赖配置
// 在 Package.swift 中添加依赖
dependencies: [.package(url: "https://github.com/aws-amplify/aws-sdk-ios-spm", from: "2.41.0")
]// 选择需要的目标模块
.target(name: "YourApp",dependencies: [.product(name: "AWSCore", package: "aws-sdk-ios-spm"),.product(name: "AWSS3", package: "aws-sdk-ios-spm"),.product(name: "AWSMobileClientXCF", package: "aws-sdk-ios-spm")]
)
CocoaPods 安装
platform :ios, '11.0'target 'YourApp' douse_frameworks!pod 'AWSCore'pod 'AWSS3'pod 'AWSMobileClient'
end
使用说明
初始化配置
import AWSMobileClient// 应用启动时初始化
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {// 初始化 AWS Mobile ClientAWSMobileClient.default().initialize { (userState, error) inif let userState = userState {print("用户状态: \(userState.rawValue)")} else if let error = error {print("初始化错误: \(error.localizedDescription)")}}return true
}
用户认证示例
import AWSMobileClientclass AuthViewController: UIViewController {func signIn(username: String, password: String) {AWSMobileClient.default().signIn(username: username, password: password) { (signInResult, error) inif let error = error {print("登录错误: \(error.localizedDescription)")return}guard let signInResult = signInResult else { return }switch signInResult.signInState {case .signedIn:print("用户登录成功")self.fetchUserAttributes()case .newPasswordRequired:print("需要设置新密码")self.showNewPasswordRequired()default:print("需要其他操作: \(signInResult.signInState.rawValue)")}}}private func fetchUserAttributes() {AWSMobileClient.default().getUserAttributes { (attributes, error) inif let error = error {print("获取用户属性错误: \(error.localizedDescription)")return}if let attributes = attributes {for attribute in attributes {print("属性: \(attribute.key) - 值: \(attribute.value)")}}}}
}
S3 文件上传示例
import AWSS3class FileUploader {func uploadImageToS3(imageData: Data, key: String) {let expression = AWSS3TransferUtilityUploadExpression()expression.progressBlock = { (task, progress) inDispatchQueue.main.async {print("上传进度: \(progress.fractionCompleted)")}}let transferUtility = AWSS3TransferUtility.default()transferUtility.uploadData(imageData,bucket: "your-bucket-name",key: key,contentType: "image/jpeg",expression: expression) { (task, error) inif let error = error {print("上传错误: \(error.localizedDescription)")return}print("文件上传成功: \(key)")}}
}
API Gateway 调用示例
import AWSAPIGatewayclass APIClient {func callBackendAPI() {// 创建 API 请求let request = AWSAPIGatewayRequest(httpMethod: "GET",urlString: "/items",queryParameters: nil,headerParameters: ["Content-Type": "application/json"],httpBody: nil)// 创建 API 客户端let client = AWSAPIGatewayClient()// 调用 APIclient.invoke(request).continueWith { (task) -> Any? inif let error = task.error {print("API 调用错误: \(error)")return nil}if let response = task.result {print("响应状态码: \(response.statusCode)")if let responseData = response.responseData {// 处理响应数据if let jsonString = String(data: responseData, encoding: .utf8) {print("响应内容: \(jsonString)")}}}return nil}}
}
核心代码解析
AWSMobileClient 初始化核心代码
// AWSMobileClient 初始化实现
public func initialize(completionHandler: @escaping (UserState?, Error?) -> Void) {// 检查现有的登录状态if let cachedLogins = self.cachedLogins {// 使用缓存的登录信息self.loadTokens(from: cachedLogins, completionHandler: completionHandler)} else {// 从 Keychain 加载凭据self.loadCredentialsFromKeychain(completionHandler: completionHandler)}
}private func loadTokens(from logins: [String: String], completionHandler: @escaping (UserState?, Error?) -> Void) {// 使用登录信息获取 AWS 凭据self.getAWSCredentials(loginTokens: logins) { (credentials, error) inif let error = error {completionHandler(nil, error)return}// 更新用户状态self.updateUserState(with: credentials)completionHandler(self.currentUserState, nil)}
}
Cognito 身份验证流程
// Objective-C 实现的身份验证管理器
@implementation AWSCognitoAuth- (void)getSession:(AWSCognitoAuthGetSessionCompletion)completion {// 检查现有的会话if ([self hasValidSession]) {[self refreshSessionIfNeededWithCompletion:completion];return;}// 启动新的认证流程[self startAuthenticationFlowWithCompletion:^(AWSCognitoAuthUserSession * _Nullable session, NSError * _Nullable error) {if (session) {// 缓存会话信息[self cacheSession:session];completion(session, nil);} else {completion(nil, error);}}];
}- (BOOL)hasValidSession {// 检查访问令牌是否有效return [self.accessToken isValid] && ![self.accessToken isExpired];
}
@end
S3 传输工具实现
// S3 文件传输的核心实现
class AWSS3TransferUtility: NSObject {func uploadData(_ data: Data,bucket: String,key: String,contentType: String,expression: AWSS3TransferUtilityUploadExpression?,completionHandler: AWSS3TransferUtilityUploadCompletionHandlerBlock?) -> AWSTask<AWSS3TransferUtilityUploadTask> {// 创建上传请求let request = AWSS3PutObjectRequest()request.bucket = bucketrequest.key = keyrequest.body = datarequest.contentType = contentType// 配置请求头if let expression = expression {request.setValue(expression.contentMD5, forHTTPHeaderField: "Content-MD5")}// 执行上传return self.s3.putObject(request).continueWith { (task) -> Any? inif let error = task.error {completionHandler?(nil, error)} else {let uploadTask = AWSS3TransferUtilityUploadTask()completionHandler?(uploadTask, nil)}return nil}}
}
API Gateway 请求处理
// API Gateway 客户端核心实现
@implementation AWSAPIGatewayClient- (AWSTask<AWSAPIGatewayResponse *> *)invoke:(AWSAPIGatewayRequest *)apiRequest {return [AWSTask taskWithResult:nil].continueWithBlock:^id(AWSTask *task) {// 构建完整的 URLNSURL *requestURL = [self requestURL:apiRequest.URLString query:apiRequest.queryParameters];// 创建 URL 请求NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:requestURL];urlRequest.HTTPMethod = apiRequest.HTTPMethod;// 设置请求头NSDictionary *finalHeaders = [self finalizeRequestHeaders:apiRequest.headerParameters];for (NSString *header in finalHeaders) {[urlRequest setValue:finalHeaders[header] forHTTPHeaderField:header];}// 设置请求体if (apiRequest.HTTPBody) {urlRequest.HTTPBody = [self processHTTPBody:apiRequest.HTTPBody];}// 执行网络请求return [self executeRequest:urlRequest];}];
}- (NSDictionary *)finalizeRequestHeaders:(NSDictionary *)requestHeaders {NSMutableDictionary *headers = [NSMutableDictionary dictionaryWithDictionary:requestHeaders];// 添加 API 密钥(如果配置了)if (self.APIKey) {headers[@"x-api-key"] = self.APIKey;}// 设置缓存控制if (!headers[@"Cache-Control"]) {headers[@"Cache-Control"] = @"no-store";}return headers;
}
@end
这些核心代码展示了 AWS iOS SDK 的关键实现细节,包括身份验证管理、文件上传处理和 API 调用等核心功能。通过模块化设计和完整的错误处理机制,SDK 为开发者提供了稳定可靠的云服务集成方案。
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