Javascript Angular4服务方法无法识别
我使用angular4创建了一个简单的服务 代码如下:Javascript Angular4服务方法无法识别,javascript,angular,Javascript,Angular,我使用angular4创建了一个简单的服务 代码如下: //app.module.ts import { BrowserModule } from '@angular/platform-browser'; import { NgModule } from '@angular/core'; import { MyserviceService } from './myservice.service'; import { AppComponent } from './app.component';
//app.module.ts
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { MyserviceService } from './myservice.service';
import { AppComponent } from './app.component';
@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule
],
providers: [MyserviceService],
bootstrap: [AppComponent]
})
export class AppModule { }
//the service
import { Injectable } from '@angular/core';
@Injectable()
export class MyserviceService {
constructor() { }
cars = ['fiat', 'form'];
myData() {
return 'Hello from service!';
}
}
//app.component.ts
import { Component, OnInit } from '@angular/core';
import { MyserviceService } from './myservice.service';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {
title = 'app';
constructor(private myservice: MyserviceService) {}
ngOnInit() {
console.log(this.myservice.cars);
this.something = this.myData();
}
}
我这里有两个问题:
我做错了什么?您正在访问app.component上的
myData()
方法,它不是app.component的成员。您必须使用myservice访问myData()
,如下所示
ngOnInit() {
console.log(this.myservice.cars);
this.something = this.myservice.myData();
}
其他一切对我来说都很好。应该是
this.myservice.myData()
,但不确定为什么不显示日志。你能在plunker中重现这个问题吗?那么接受的答案如何解决console.log
问题呢?是的,一旦我添加了这个.myservice.myData()。。控制台也出现了