Flutter/Dart将Int转换为Enum [英] Flutter / Dart Convert Int to Enum

问题描述

有没有简单的方法可以将整数值转换为枚举?我想从共享首选项中检索一个整数值，并将其转换为枚举类型.

Is there a simple way to convert an integer value to enum? I want to retrieve an integer value from shared preference and convert it to an enum type.

我的列举是:

enum ThemeColor { red, gree, blue, orange, pink, white, black };

我想轻松地将整数转换为枚举:

I want to easily convert an integer to an enum:

final prefs = await SharedPreferences.getInstance();
ThemeColor c = ThemeColor.convert(prefs.getInt('theme_color')); // something like that

推荐答案

int idx = 2;
print(ThemeColor.values[idx]);

应该给您

ThemeColor.blue

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