Question

尝试在模板中使用自定义管道时出现错误：

Error: Template parse errors:
The pipe 'currencySeperator' could not be found

这里是CurrencySeperatorPipe

import { Pipe, PipeTransform } from '@angular/core';

    @Pipe({
        name: 'currencySeperator'
    })
    export class  CurrencySeperatorPipe implements PipeTransform {
        transform(value: any, decimalSp: string = ',', thousandSp: string = '.'): number {
            return this.localeString(value,decimalSp,thousandSp);
        }

        missingOneDecimalCheck(nStr) {
            nStr += '';
            const x = nStr.split(',')[1];
            if (x && x.length === 1) return true;
            return false;
        }

        missingAllDecimalsCheck(nStr) {
            nStr += '';
            const x = nStr.split(',')[1];
            if (!x) return true;
            return false;
        }

        localeString(nStr,decimalSp,thousandSp) {
            if (nStr === '') return '';
            let x, x1, x2, rgx, y1, y2;
            nStr += '';
            x = nStr.split(thousandSp);
            x1 = x[0];
            x2 = x.length > 1 ? decimalSp + x[1] : '';
            rgx = /(\d+)(\d{3})/;
            while (rgx.test(x1)) {
                x1 = x1.replace(rgx, '$1' + thousandSp + '$2');
            }

            /** If value was inputed by user, it could have many decimals(up to 7)
                so we need to reformat previous x1 results */
            if (x1.indexOf(decimalSp) !== -1) {
                y1 = x1.slice(x1.lastIndexOf(decimalSp)).replace(/\./g, '');

                y2 = x1.split(decimalSp);
                x = y2[0] + y1;
            } else {
                x = x1 + x2;
                if (this.missingOneDecimalCheck(x)) return x += '0';
                if (this.missingAllDecimalsCheck(x)) return x += `${decimalSp}00`;
            }

            return x;
        }
    }

所以我创建了 pipe.module.ts ：

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { CurrencySeperatorPipe } from './currency-seperator.pipe';

    @NgModule({
      declarations: [CurrencySeperatorPipe],
      imports: [],
      exports:[CurrencySeperatorPipe]
    })
    export class PipeModule {
      static forRoot() {
        return {
          ngModule: PipeModule,
          providers: [],
        };
      }
    }

我将此模块导入了 app.module.ts

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
...
    PipeModule.forRoot(),
  ],
  providers: [],
  bootstrap: [AppComponent],
  entryComponents: [
    ModalComponent,
    LoginComponent
  ],
})
export class AppModule { }

当我尝试使用 {{price | currencySeperator：'，'：'。'}} 像这样在模板中给我这个错误。

我该如何解决？

谢谢

Answer 1

您不需要在AppModule中导入PipeModule，而是在使用管道的组件所属的模块中导入。

错误：模板解析错误：找不到管道“ currencySeperator”

1 个答案: