应用场景，不同组件中操作统一组数据，不论哪个组件对数据进行了操作，其他组件中立马看到效果。这样他们就要共用一个服务实例，是本次的重点，如果不同实例，那么操作的就不是同一组数据，那么就不会有这样的效果，想实现共用服务实例，就是在所有父组件中priviates:[]中引入这个组件，子组件中不需要再次引入，那么他们都是用的父组件中的服务实例。
1、公用服务
@Injectable()
export class CommonService {
public dateList: any = [
{
name: "张旭超",age: 20,address: "北京市朝阳区"
}
];
export class CommonService {
public dateList: any = [
{
name: "张旭超",age: 20,address: "北京市朝阳区"
}
];
constructor() {
}
addDateFun(data) {
this.dateList.push(data);
}
}
2、parent.component.ts
// 这里要通过父子公用服务来操作数据，只需要在父组件中引入服务。
@Component({
selector: "parent-tag",templateUrl: "parent.component.html",providers: [
CommonService
]
})
export class ParentComponent implements OnInit {
public list: any = [];
@Component({
selector: "parent-tag",templateUrl: "parent.component.html",providers: [
CommonService
]
})
export class ParentComponent implements OnInit {
public list: any = [];
constructor(private commonService: CommonService) {
this.list = commonService.dateList;
}
ngOnInit() {
}
}
3、parent.component.html
4、child-one.component.ts
@Component({
selector: "child-one-tag",templateUrl: "child-one.component.html"
})
export class ChildOneComponent {
public display: boolean = false;
public username: string = "";
public age: number = 20;
public address: string = "";
constructor(public commonService: CommonService) {
selector: "child-one-tag",templateUrl: "child-one.component.html"
})
export class ChildOneComponent {
public display: boolean = false;
public username: string = "";
public age: number = 20;
public address: string = "";
constructor(public commonService: CommonService) {
}
showDialog() {
this.display = true;
}
hideDialog() {
this.display = false;
}
addInfoFun() {
let params = {
name: this.username,age: this.age,address: this.address
};
this.commonService.addDateFun(params);
params = {};
}
}
5、child-one.component.html
姓名：
年龄：
地址：
