myworkout：类型上不存在属性

Question

有问题。 除了以下代码行，一切都很好：

"this.workoutService.deleteWorkout(workoutId).subscribe(data => {
       this.result = data;"

具体地说，“ workoutService” ...说“类型'WorkoutDetailsPage'上不存在属性'workoutService'。”

从此代码（WorkoutDetailsPage）：

import { Component } from '@angular/core';
import { NavController, NavParams } from 'ionic-angular';
import { WorkoutService } from '../../app/services/workout.service';
import { WorkoutsPage } from '../workouts/workouts'

@Component({
selector: 'workout-details',
templateUrl: 'workout-details.html'
})
export class WorkoutDetailsPage {
public workout: any;
public result: any;

constructor(public navCtrl: NavController, public params:NavParams, workoutService:WorkoutService) {
    this.workout = params.get('workout');
}

deleteWorkout(workoutId){
    this.workoutService.deleteWorkout(workoutId).subscribe(data => {
       this.result = data;
    });

    this.navCtrl.push(WorkoutsPage);
  }
}

结果是这样的： 在此处输入图片描述

Answer 1

构造函数中没有访问修饰符的任何参数都不会添加为类成员。 只需在构造函数中将private或public添加到您的锻炼服务参数即可：

constructor(public navCtrl: NavController, public params: NavParams, private workoutService: WorkoutService)