<div class="container">
 <div class="row">
  <form>
   <div class="form-group">
    <label for="exampleInputEmail1">X坐标</label>
    <input type="text" class="form-control" id="exampleInputEmail1" placeholder="xcood" name="xcood">
   </div>
   <div class="form-group">
    <label for="exampleInputPassword1">Y坐标</label>
    <input type="text" class="form-control" id="exampleInputPassword1" placeholder="ycood" name="ycood">
   </div>
   <button type="button" class="btn btn-default" (click)="additem()">添加</button>
  </form>  
 </div>
 <div class="row">
  <data-table [array]="addArray"></data-table><!--导入dataTable组件，并且将父组件里面的form表单数据传递给子组件渲染-->
 </div>
</div>

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

@Component({
 selector: 'app-root',
 templateUrl: './app.component.html',
 styleUrls: ['./app.component.css']
})
export class AppComponent {
 addArray=[];
 xcood: any;
 ycood: any;

 additem(){
  this.xcood = (document.getElementsByName('xcood')[0] as HTMLInputElement).value;
  this.ycood = (document.getElementsByName('ycood')[0] as HTMLInputElement).value;
  this.addArray.push({
   xcood:this.xcood,
   ycood:this.ycood
  })
 }
}

<table class="table table-striped">
 <thead>
  <tr>
   <th>X坐标</th>
   <th>Y坐标</th>
   <th>操作</th>
  </tr>
 </thead>
 <tbody *ngIf="array.length!==0"><!--这里我们判断一下传递过来的数组是否为空，如果是空的话我们就没有必要渲染出来了-->
  <tr *ngFor="let data of array">
   <td>{{data.xcood}}</td>
   <td>{{data.ycood}}</td>
   <td><button type="button" class="btn btn-default" (click)="delete(data)">删除</button></td>
  </tr>
 </tbody>
</table>

import { Component,Input } from '@angular/core';

@Component({
 selector: 'data-table',
 templateUrl: './dataTable.component.html',
 styleUrls: ['./dataTable.component.css']
})
export class DataTableComponent {
  @Input() array:any;//接收父组件传递过来的addArray数组
  index: number;   //跟上面说的一样要先声明
  delete(data){
    this.index = this.array.indexOf(data);
    if (this.index > -1) {
      this.array.splice(this.index, 1);//跟上面说的一样在初始化的时候要用到this
      }
  }
}

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

import { AppComponent } from './app.component';
import { DataTableComponent } from './dataTable/dataTable.component';

@NgModule({
 declarations: [
  AppComponent,
  DataTableComponent
 ],
 imports: [
  BrowserModule
 ],
 providers: [],
 bootstrap: [AppComponent]
})
export class AppModule { }