我只需要在我的根页面上调用该函数。但这在所有页面上都被调用了ionic 2

ionic generate service shared

import { Injectable } from '@angular/core';

@Injectable()
export class SharedService {
  myFunction() {
    // 在这里编写你的函数逻辑
  }
}

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { IonicModule } from 'ionic-angular';

import { MyApp } from './app.component';
import { SharedService } from './shared/shared.service';

@NgModule({
  declarations: [MyApp],
  imports: [BrowserModule, IonicModule.forRoot(MyApp)],
  bootstrap: [IonicApp],
  entryComponents: [MyApp],
  providers: [SharedService] // 添加SharedService到providers数组中
})
export class AppModule {}

import { Component } from '@angular/core';
import { SharedService } from '../shared/shared.service';

@Component({
  selector: 'page-home',
  templateUrl: 'home.html'
})
export class HomePage {
  constructor(private sharedService: SharedService) {
    this.sharedService.myFunction();
  }
}