SwiftUI 是否向后兼容 iOS 12.x 及更早版本?

本文介绍了SwiftUI 是否向后兼容 iOS 12.x 及更早版本?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

如果我有一个使用 SwiftUI 制作的应用，它是否适用于 iOS 13 以下的 iOS?

If I have an app made with SwiftUI, will it work for iOS below iOS 13?

推荐答案

我刚刚在 Xcode 11 中检查了它并且可以确认它不会向后兼容，正如在 SwiftUI 的 View 实施:

I just checked it out in Xcode 11 and can confirm it won't be backwards-compatible, as can be seen in SwiftUI's View implementation:

/// A piece of user interface. /// /// You create custom views by declaring types that conform to the `View` /// protocol. Implement the required `body` property to provide the content /// and behavior for your custom view. @available(iOS 13.0, OSX 10.15, tvOS 13.0, watchOS 6.0, *) public protocol View : _View { /// The type of view representing the body of this view. /// /// When you create a custom view, Swift infers this type from your /// implementation of the required `body` property. associatedtype Body : View /// Declares the content and behavior of this view. var body: Self.Body { get } }