Flutter 中的primaryColor 和primarySwatch 有什么区别? [英] What is the difference between primaryColor and primarySwatch in Flutter?

问题描述

在 Flutter 中，可以使用 ThemeData 类将主题应用于应用程序.但是这个类的两个属性让我感到困惑:primaryColor 和 primarySwatch.这两个属性之间有什么区别以及何时使用其中一个?谢谢.

In Flutter, one can apply a theme to the app using ThemeData class. But there two propeties of this class that confuses me: primaryColor and primarySwatch. What's the difference between these two properties and when to use one or the other? Thanks.

推荐答案

primarySwatch not 是 Color.它是 MaterialColor.这意味着材质应用将使用不同深浅的颜色.

primarySwatch is not a Color. It's MaterialColor. Which means it's a the different shades of a color a material app will use.

primaryColor 就是其中一种.准确地说，primaryColor 通常等于 primarySwatch[500].

primaryColor is one of those shades. To be exact, primaryColor is normally equal to primarySwatch[500].

通常最好定义一个 primarySwatch 而不是 primaryColor.因为某些材质组件可能会使用 primaryColor 的不同阴影来处理诸如阴影、边框、...

It is usually better to define a primarySwatch instead of primaryColor. Because some material components may use a different shade of the primaryColor for things such as shadow, border, ...

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