https://before80.github.io/prgms/Swift/SwiftUI/datastorage/Recent content in 3 数据与存储 on 编程那些事儿Hugozh-cnSun, 13 Sep 2026 18:20:56 +0800https://before80.github.io/prgms/Swift/SwiftUI/datastorage/2-EnvironmentValues/Sat, 12 Sep 2026 12:47:47 +0800https://before80.github.io/prgms/Swift/SwiftUI/datastorage/2-EnvironmentValues/<blockquote> <p>原文链接: <a href="https://developer.apple.com/documentation/swiftui/environment-values">https://developer.apple.com/documentation/swiftui/environment-values</a></p> </blockquote> <h1 id="2-环境值">2 环境值</h1> <p>使用环境在整个视图层级中共享数据。</p> <h2 id="Overview">概述</h2> <p>SwiftUI 中的视图可以响应它们通过 <a href="https://developer.apple.com/documentation/swiftui/environment">Environment</a> 属性包装器从环境中读取的配置信息。</p> <p> <img src="https://before80.github.io/prgms/Swift/SwiftUI/datastorage/images/environment-values-hero@2x.png" alt="" data-cur-dir="Swift/SwiftUI/datastorage" data-rg="/images/environment-values-hero@2x.png" data-rg1="images/environment-values-hero@2x.png" data-rel="/prgms/images/environment-values-hero@2x.png" data-c4my="/prgms" /> </p> <p>视图从其容器视图继承环境，但可以被 <a href="https://developer.apple.com/documentation/swiftui/view/environment(_:_:)">environment(<em>:</em>:)</a> 视图修饰符显式改变，也可以被众多作用于环境值的修饰符隐式改变。因此，你可以通过修改某个视图组容器的环境，来配置整个视图层级。</p>https://before80.github.io/prgms/Swift/SwiftUI/datastorage/3-Preferences/Sat, 12 Sep 2026 12:47:47 +0800https://before80.github.io/prgms/Swift/SwiftUI/datastorage/3-Preferences/<blockquote> <p>原文链接: <a href="https://developer.apple.com/documentation/swiftui/preferences">https://developer.apple.com/documentation/swiftui/preferences</a></p> </blockquote> <h1 id="3-偏好设置">3 偏好设置</h1> <p>把配置偏好从视图传递给容纳它们的容器视图。</p> <h2 id="Overview">概述</h2> <p>环境用于配置某个视图的子视图，而偏好设置则用于把配置信息从子视图向上发送给容器。不过，与从一个容器向下流向众多子视图的配置信息不同，单个容器需要协调从众多子视图向上流动的、可能相互冲突的偏好设置。</p>