angular8 — 数据更新但页面不刷新

import { Component, OnInit, ChangeDetectionStrategy, ChangeDetectorRef } from '@angular/core';

@Component({
  selector: 'kt-investor-investment',
  templateUrl: './investor-investment.component.html',
  styleUrls: ['./investor-investment.component.scss'],
  changeDetection: ChangeDetectionStrategy.OnPush
})
export class InvestorInvestmentComponent implements OnInit {
 public dataList;	// 存放页面数据的变量
  constructor(
  	private ref: ChangeDetectorRef
  ) {
  }

  ngOnInit() {
  }
  
  // 这个方法在我的项目中是重新获取页面数据的
  public getDataList() {
    this.http.post(this.api.urlList.GetList, data, res => {
      if (res) {
        this.dataList = res;
        this.ref.markForCheck();	// 就是在拿到数据后，执行这两行代码，这是关键
        this.ref.detectChanges();
      }
    })
  }
}