如何为我的应用程序制作离线数据库？
How to make offline database for my app?
我在使用 RestAPI 和保存离线数据时遇到问题。有没有人对此有最好的想法。
我想将来自服务器的 JSON 响应保存在本地数据库中，并在没有互联网可用时使用该数据。像 Firebase 实时数据库。
我认为您要求的是一种将数据持久保存到您的应用程序中的机制。有几种方法可以实现这一点。虽然它可能过于宽泛而无法提供详细的答案，但您可能需要检查选项：
数据库：
Core Data is an object graph and persistence framework provided by
Apple in the macOS and iOS operating systems. It was introduced in Mac
OS X 10.4 Tiger and iOS with iPhone SDK 3.0. It allows data
organized by the relational entity–attribute model to be serialized
into XML, binary, or SQLite stores. The data can be manipulated using
higher level objects representing entities and their relationships.
Core Data manages the serialized version, providing object lifecycle
and object graph management, including persistence. Core Data
interfaces directly with SQLite, insulating the developer from the
underlying SQL.
- SQLite -with a wrapper such as SQLite.swift-
SQLite is a relational database management system contained in a C
programming library. In contrast to many other database management
systems, SQLite is not a client–server database engine. Rather, it is
embedded into the end program.
Realm is an open-source object database management system, initially
for mobile (Android/iOS), also available for platforms such as Xamarin
or React Native, and others, including desktop applications (Windows),
and is licensed under the Apache License.
其他选择：
The UserDefaults class provides a programmatic interface for
interacting with the defaults system. The defaults system allows an
app to customize its behavior to match a user’s preferences. For
example, you can allow users to specify their preferred units of
measurement or media playback speed. Apps store these preferences by
assigning values to a set of parameters in a user’s defaults database.
The parameters are referred to as defaults because they’re commonly
used to determine an app’s default state at startup or the way it acts
by default.
- 将数据保存到 plist 个文件：
In the macOS, iOS, NeXTSTEP, and GNUstep programming frameworks,
property list files are files that store serialized objects. Property
list files use the filename extension .plist, and thus are often
referred to as p-list files.
Property list files are often used to store a user's settings. They
are also used to store information about bundles and applications, a
task served by the resource fork in the old Mac OS.
- 将数据保存到 json 个文件：
In computing, JavaScript Object Notation or JSON is an open-standard
file format that uses human-readable text to transmit data objects
consisting of attribute–value pairs and array data types (or any other
serializable value). It is a very common data format used for
asynchronous browser–server communication, including as a replacement
for XML in some AJAX-style systems.
我在使用 RestAPI 和保存离线数据时遇到问题。有没有人对此有最好的想法。
我想将来自服务器的 JSON 响应保存在本地数据库中，并在没有互联网可用时使用该数据。像 Firebase 实时数据库。
我认为您要求的是一种将数据持久保存到您的应用程序中的机制。有几种方法可以实现这一点。虽然它可能过于宽泛而无法提供详细的答案，但您可能需要检查选项：
数据库：
Core Data is an object graph and persistence framework provided by Apple in the macOS and iOS operating systems. It was introduced in Mac OS X 10.4 Tiger and iOS with iPhone SDK 3.0. It allows data organized by the relational entity–attribute model to be serialized into XML, binary, or SQLite stores. The data can be manipulated using higher level objects representing entities and their relationships. Core Data manages the serialized version, providing object lifecycle and object graph management, including persistence. Core Data interfaces directly with SQLite, insulating the developer from the underlying SQL.
- SQLite -with a wrapper such as SQLite.swift-
SQLite is a relational database management system contained in a C programming library. In contrast to many other database management systems, SQLite is not a client–server database engine. Rather, it is embedded into the end program.
Realm is an open-source object database management system, initially for mobile (Android/iOS), also available for platforms such as Xamarin or React Native, and others, including desktop applications (Windows), and is licensed under the Apache License.
其他选择：
The UserDefaults class provides a programmatic interface for interacting with the defaults system. The defaults system allows an app to customize its behavior to match a user’s preferences. For example, you can allow users to specify their preferred units of measurement or media playback speed. Apps store these preferences by assigning values to a set of parameters in a user’s defaults database. The parameters are referred to as defaults because they’re commonly used to determine an app’s default state at startup or the way it acts by default.
- 将数据保存到 plist 个文件：
In the macOS, iOS, NeXTSTEP, and GNUstep programming frameworks, property list files are files that store serialized objects. Property list files use the filename extension .plist, and thus are often referred to as p-list files.
Property list files are often used to store a user's settings. They are also used to store information about bundles and applications, a task served by the resource fork in the old Mac OS.
- 将数据保存到 json 个文件：
In computing, JavaScript Object Notation or JSON is an open-standard file format that uses human-readable text to transmit data objects consisting of attribute–value pairs and array data types (or any other serializable value). It is a very common data format used for asynchronous browser–server communication, including as a replacement for XML in some AJAX-style systems.