parse-community/Parse-SDK-iOS-OSX
Parse SDK IOS OSX
该项目是一个用于 iOS 和 macOS 应用的客户端软件开发工具包（SDK），将移动软件与基于云的后端集成。它作为移动后端即服务（MBaaS）接口，使开发者无需维护服务器端基础设施即可管理用户身份验证、云数据持久化和同步。
该框架专为离线优先开发而设计，利用本地数据存储来缓存应用状态，并确保在网络断开期间的功能可用性。它具有自动同步引擎，可对挂起的操作进行排队，并在连接恢复后在后台执行。该系统采用无模式数据模型，允许将任意键值对存储为对象，而无需预定义的数据库模式或僵化的迁移。
除了基础存储外，该 SDK 还支持关系数据建模，能够创建记录之间的链接以保持实体间的一致性。它还通过事件驱动的订阅提供实时功能，将服务器端的数据变更直接推送到客户端。为了优化性能，该库执行基于增量的同步，仅向服务器传输修改后的对象字段，以减少带宽消耗。
Features
- Backend-as-a-Service Integrations - Connects Apple applications to a cloud backend to handle data storage, user authentication, and synchronization without managing server infrastructure.
- Mobile Backend SDKs - Provides a comprehensive client-side SDK for iOS and macOS to manage authentication, data persistence, and cloud synchronization.
- Cloud Database Clients - Acts as a client-side interface for interacting with a cloud-hosted database, supporting both schemaless objects and relational data links.
- Local Data Stores - Stores objects directly on the device to ensure offline access and trigger automatic synchronization with the cloud backend when connectivity returns.
- Local Persistence - Caches remote objects in a local SQLite database to provide offline access and enable background synchronization when network connectivity returns.
- Offline-First Persistence - Implements an offline-first synchronization engine that caches state locally and automatically queues background operations for cloud synchronization.
- Persistent Application State - Saves and retrieves structured objects in a remote database to maintain application state across user sessions and different hardware devices.
- User Authentications - Verifies user identities and maintains active sessions to secure application access and associate personal data with specific individual accounts.
- Offline Request Queues - Schedules save and delete requests to execute automatically when network connectivity becomes available, even if the application restarts in the meantime.
- Backend-as-a-Service Platforms - Functions as a client-side framework for integrating mobile applications with a backend-as-a-service platform.
- Schema-Agnostic Storage - Stores arbitrary key-value pairs as flexible objects in a remote database without requiring predefined table structures or rigid data migrations.
- Delta-Based Synchronization Engines - Transmits only modified object fields to the server during updates to minimize bandwidth consumption and reduce potential data conflicts.
- Object-Relational Mapping - Maps local object instances to remote database records by serializing properties into structured JSON payloads for network transmission.
- Real-time Data Synchronization - Subscribes to server-side data changes to push live updates to mobile devices, ensuring users always see the most current information.
- Live Update Subscriptions - Subscribes to data changes on the server to push live updates to the client application as soon as records are modified.
- Relational Data Modeling - Connects objects by storing references to other records to ensure data consistency and integrity across related entities.
- Relational Data Modeling - Structures complex data relationships within mobile applications to ensure consistency and integrity across linked records in a cloud database.
- Remote Data Fetching - Fetches stored objects from the cloud using unique identifiers or updates existing local instances with the latest server state.
- Schemaless Data Stores - Provides a schemaless data model allowing storage of arbitrary key-value pairs without predefined database schemas.
- Real-time Data Subscriptions - Maintains persistent socket connections to receive server-side push notifications that trigger local state updates when remote data changes.
- Partial Update Strategies - Modifies specific fields on existing objects and transmits only the changed data to the server to minimize bandwidth usage.
- Queued Retry Executors - Schedules pending network requests in a persistent task queue that automatically retries operations when the device regains a stable connection.
