typescript - 如何按序号访问 Typescript 枚举

Question

我有以下...

enum NubDirection {
  OUTWARD,
  INWARD
}
...
direction : NubDirection;
...
let index = Math.floor(Math.random() * 2) + 1;
nub.direction = NubDirection[index];

但这会抛出

error TS2322: Type 'string' is not assignable to type 'NubDirection'.

Answer 1

如果你有这样的字符串枚举:

export enum LookingForEnum {
    Romantic = 'Romantic relationship',
    Casual = 'Casual relationship',
    Friends = 'Friends',
    Fun = 'Fun things to do!'
}

然后

 const index: number = Object.keys(LookingForEnum).indexOf('Casual'); // 1