使用 MobX 中的 useLocalObservable 来处理 TypeScript 时出现 TypeError?
TypeError when using `useLocalObservable` from MobX to work with TypeScript?
我基本上是在按照 this video which points to this repo 将我的应用程序转换为使用 MobX v6。我正在使用 useLocalObservable
,因为 useLocalStore
在 MobX v6 中已被弃用。
我得到的错误是 useLocalObservable
内部的 FrameItStore
:
Argument of type 'typeof FrameItStore' is not assignable to parameter of type '() => Record<string, any>'.
Type 'typeof FrameItStore' provides no match for the signature '(): Record<string, any>'.ts(2345)
然后整个 return 语句在 VSCode.
中用红色波浪线表示
想知道如何修复它吗?
types.ts
export type Window = {
width: number
height: number
}
export type Point = {
x: number
y: number
}
export type TrafficSignal = {
close: string
minimize: string
maximize: string
}
export type TrafficSignalPosition = {
close: Point
minimize: Point
maximize: Point
}
export interface IFrameItStore {
id: number
trafficSignalColors: Array<TrafficSignal>
}
FrameItStore.ts
import { makeObservable, observable, action, computed } from 'mobx'
import type {
TrafficSignal,
Point,
Window,
TrafficSignalPosition,
IFrameItStore,
} from '../types'
export class FrameItStore implements IFrameItStore {
id = 0
trafficSignalColors = [
{
close: '#EF4444',
minimize: '#FBBE25',
maximize: '#49DE80',
},
{
close: 'black',
minimize: 'blue',
maximize: 'orange',
},
]
constructor() {
makeObservable(this, {
win: observable,
box: observable,
boxCenter: computed,
trafficSignalPosition: computed,
trafficSignalColors: observable,
id: observable,
})
}
win(): Window {
return {
width: window.innerWidth,
height: window.innerHeight,
}
}
box(): Window {
return {
width: 1024,
height: 600,
}
}
get boxCenter(): Point {
return {
x: (this.win().width - this.box().width) / 2,
y: (this.win().height - this.box().height) / 2,
}
}
get trafficSignalPosition(): TrafficSignalPosition {
return {
close: { x: this.boxCenter.x + 20, y: this.boxCenter.y + 20 },
minimize: { x: this.boxCenter.x + 2 * 20, y: this.boxCenter.y + 20 },
maximize: { x: this.boxCenter.x + 3 * 20, y: this.boxCenter.y + 20 },
}
}
}
export const config = new FrameItStore()
FrameItContext.tsx
import * as React from 'react'
import { useLocalObservable } from 'mobx-react'
import { FrameItStore } from './FrameItStore'
const FrameItContext = React.createContext(null)
export const FrameItProvider = ({ children }: { children: React.ReactChild }) => {
const frameItStore = useLocalObservable(FrameItStore)
return (
<FrameItContext.Provider value={frameItStore}>
{children}
</FrameItContext.Provider>
)
}
export const useFrameItStore = () => React.useContext(FrameItContext)
您正在关注的回购 returns an object that is used for useLocalStore
。您的代码中的等效项是将 FrameItStore
class 的实例用于 useLocalObservable
.
您还可以 return 从给定 useLocalObservable
的函数中创建一个实例,以便在组件的第一次渲染时只创建一个实例。
const FrameItContext = React.createContext<IFrameItStore | null>(null);
export const FrameItProvider = ({ children }: { children: React.ReactChild }) => {
const frameItStore = useLocalObservable(() => new FrameItStore());
return (
<FrameItContext.Provider value={frameItStore}>
{children}
</FrameItContext.Provider>
);
};
我基本上是在按照 this video which points to this repo 将我的应用程序转换为使用 MobX v6。我正在使用 useLocalObservable
,因为 useLocalStore
在 MobX v6 中已被弃用。
我得到的错误是 useLocalObservable
内部的 FrameItStore
:
Argument of type 'typeof FrameItStore' is not assignable to parameter of type '() => Record<string, any>'.
Type 'typeof FrameItStore' provides no match for the signature '(): Record<string, any>'.ts(2345)
然后整个 return 语句在 VSCode.
中用红色波浪线表示想知道如何修复它吗?
types.ts
export type Window = {
width: number
height: number
}
export type Point = {
x: number
y: number
}
export type TrafficSignal = {
close: string
minimize: string
maximize: string
}
export type TrafficSignalPosition = {
close: Point
minimize: Point
maximize: Point
}
export interface IFrameItStore {
id: number
trafficSignalColors: Array<TrafficSignal>
}
FrameItStore.ts
import { makeObservable, observable, action, computed } from 'mobx'
import type {
TrafficSignal,
Point,
Window,
TrafficSignalPosition,
IFrameItStore,
} from '../types'
export class FrameItStore implements IFrameItStore {
id = 0
trafficSignalColors = [
{
close: '#EF4444',
minimize: '#FBBE25',
maximize: '#49DE80',
},
{
close: 'black',
minimize: 'blue',
maximize: 'orange',
},
]
constructor() {
makeObservable(this, {
win: observable,
box: observable,
boxCenter: computed,
trafficSignalPosition: computed,
trafficSignalColors: observable,
id: observable,
})
}
win(): Window {
return {
width: window.innerWidth,
height: window.innerHeight,
}
}
box(): Window {
return {
width: 1024,
height: 600,
}
}
get boxCenter(): Point {
return {
x: (this.win().width - this.box().width) / 2,
y: (this.win().height - this.box().height) / 2,
}
}
get trafficSignalPosition(): TrafficSignalPosition {
return {
close: { x: this.boxCenter.x + 20, y: this.boxCenter.y + 20 },
minimize: { x: this.boxCenter.x + 2 * 20, y: this.boxCenter.y + 20 },
maximize: { x: this.boxCenter.x + 3 * 20, y: this.boxCenter.y + 20 },
}
}
}
export const config = new FrameItStore()
FrameItContext.tsx
import * as React from 'react'
import { useLocalObservable } from 'mobx-react'
import { FrameItStore } from './FrameItStore'
const FrameItContext = React.createContext(null)
export const FrameItProvider = ({ children }: { children: React.ReactChild }) => {
const frameItStore = useLocalObservable(FrameItStore)
return (
<FrameItContext.Provider value={frameItStore}>
{children}
</FrameItContext.Provider>
)
}
export const useFrameItStore = () => React.useContext(FrameItContext)
您正在关注的回购 returns an object that is used for useLocalStore
。您的代码中的等效项是将 FrameItStore
class 的实例用于 useLocalObservable
.
您还可以 return 从给定 useLocalObservable
的函数中创建一个实例,以便在组件的第一次渲染时只创建一个实例。
const FrameItContext = React.createContext<IFrameItStore | null>(null);
export const FrameItProvider = ({ children }: { children: React.ReactChild }) => {
const frameItStore = useLocalObservable(() => new FrameItStore());
return (
<FrameItContext.Provider value={frameItStore}>
{children}
</FrameItContext.Provider>
);
};