[英]Unsure of how to use custom TypeScript class in an angular component
我有一个组件 GameBoardComponent,我想要一个 Box,它是 TypeScript class。 我最初试图让它像“class Box {}”,但我读到你不能这样做,所以我尝试了“export class Box(){}”,现在看起来像:
import {GameBoardComponent} from './game-board/game-board.component';
import * as p5 from 'p5';
export class Box {
x: number;
y: number;
width: number;
height: number;
board: GameBoardComponent;
constructor(x: number,y: number, width:number) {
this.width = width;
this.height = width;
this.x=1;
this.y=1;
}
draw(canvas: p5): void {
canvas.rect(this.x,this.y,this.width,this.height);
};
}
我的游戏板看起来像:
import { Component, OnInit } from '@angular/core';
import { Box } from '../Box';
import * as p5 from 'p5';
/**
*@todo Game Board
*@body Complete the gameboard, possible integration with other smaller components ie a Tetris component or a Box component
*/
@Component({
selector: 'app-game-board',
template: `
<p>
game-board works!
</p>
`,
styleUrls: ['./game-board.component.scss']
})
export class GameBoardComponent implements OnInit {
height: number;
width: number;
canvas: p5;
test: Box;
constructor() { }
ngOnInit() {
this.height = 100;
this.width = 20;
this.test = new Box(1,1,this.canvas.width);
const sketch = (s) => {
s.preload = () => {
// preload code
}
s.setup = () => {
s.createCanvas(window.innerWidth/4, window.innerHeight*.8);
};
s.draw = () => {
s.scale(1, -1);
s.translate(0, -s.height);
s.background(0);
s.rect(100, 100, 100, 100);
s.test.draw();
};
s.windowResized = () => {
s.resizeCanvas(window.innerWidth/4, window.innerHeight*.8);
};
}
this.canvas = new p5(sketch);
}
}
我的 app.module 看起来像:
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import {MatButtonModule} from '@angular/material/button';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { GameBoardComponent } from './game-board/game-board.component';
import { TetrisPieceComponent } from './tetris-piece/tetris-piece.component';
import { HoldBoxComponent } from './hold-box/hold-box.component';
import { ViewBoxComponent } from './view-box/view-box.component';
import { MainMenuComponent } from './main-menu/main-menu.component';
import { Box } from './Box';
@NgModule({
declarations: [
AppComponent,
GameBoardComponent,
TetrisPieceComponent,
HoldBoxComponent,
ViewBoxComponent,
MainMenuComponent,
Box
],
imports: [
BrowserModule,
AppRoutingModule,
MatButtonModule
],
providers: [
],
bootstrap: [AppComponent]
})
export class AppModule { }
尝试编译时出现以下错误:
Uncaught Error: Unexpected value 'Box' declared by the module 'AppModule'. Please add a @Pipe/@Directive/@Component annotation.
我在谷歌上广泛搜索了这个错误,并试图将 app.module 中的 Box 从声明移到提供者的其他位置,但它给出了不同的错误并且无法解析构造函数类型。 所以也许这就是我的问题? 不管我花了一大半早上的时间试图找出在 angular 组件中使用我自己的 typescript class 的正确方法是什么,我还没有找到任何可行的方法。
任何帮助,将不胜感激。
无需在app.module.ts
中声明Box
,因为它不是模块、组件、指令或 pipe。 所以只需从app.module.ts
中删除Box
。
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