我终于找到了我的问题的答案。当你使用插件时，你需要在你使用的每个@NgModule-Schema中导入CUSTOM_ELEMENTS_SCHEMA。请看下面的例子：在我的例子中，我必须将它导入到我的tab-map.module.ts和app. module. ts中。
tab-map.module.ts

import { IonicModule } from '@ionic/angular';
import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule } from '@angular/forms';
import { TabMapPage } from './tab-map.page';
import { CUSTOM_ELEMENTS_SCHEMA } from '@angular/core';

import { TabMapPageRoutingModule } from './tab-map-routing.module';

@NgModule({
  imports: [
    IonicModule,
    CommonModule,
    FormsModule,
    TabMapPageRoutingModule
  ],
  declarations: [TabMapPage],
  schemas: [CUSTOM_ELEMENTS_SCHEMA]
})
export class TabMapPageModule {}

app.module.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { RouteReuseStrategy } from '@angular/router';

import { IonicModule, IonicRouteStrategy } from '@ionic/angular';

import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { CUSTOM_ELEMENTS_SCHEMA } from '@angular/core';

@NgModule({
  declarations: [
    AppComponent,
  ],
  entryComponents: [],
  imports: [BrowserModule, IonicModule.forRoot(), AppRoutingModule],
  providers: [{ provide: RouteReuseStrategy, useClass: IonicRouteStrategy }],
  bootstrap: [AppComponent],
  schemas: [CUSTOM_ELEMENTS_SCHEMA]
})
export class AppModule {}

希望这对你有帮助！