在Angular中检测双击或触摸事件可以使用以下方法：

1. 使用HostListener装饰器监听元素的双击事件或触摸事件，并在事件发生时执行相应的操作。示例如下：

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

@Component({
  selector: 'app-double-tap',
  template: `
    
双击我
    
触摸我
  `
})
export class DoubleTapComponent {
  @HostListener('dblclick')
  onDoubleTap() {
    console.log('Double tap event occurred');
    // 执行双击事件的操作
  }

  touchStartTime: number;

  onTouchStart() {
    this.touchStartTime = Date.now();
  }

  onTouchEnd() {
    const touchEndTime = Date.now();
    const touchDuration = touchEndTime - this.touchStartTime;
    if (touchDuration < 500) {
      console.log('Touch event occurred');
      // 执行触摸事件的操作
    }
  }
}

2. 使用RxJS的fromEvent方法来创建Observable对象并订阅双击或触摸事件。示例如下：

import { Component, ElementRef, OnInit } from '@angular/core';
import { fromEvent } from 'rxjs';
import { buffer, filter } from 'rxjs/operators';

@Component({
  selector: 'app-double-tap',
  template: `
    
双击或触摸我
  `
})
export class DoubleTapComponent implements OnInit {
  constructor(private elementRef: ElementRef) {}

  ngOnInit() {
    const element = this.elementRef.nativeElement;
    const click$ = fromEvent(element, 'click');
    const doubletap$ = click$.pipe(
      buffer(click$.pipe(filter(() => Date.now() - this.lastClickTime < 300))),
      map(clicks => clicks.length),
      filter(clicksLength => clicksLength === 2)
    );

    doubletap$.subscribe(() => {
      console.log('Double tap event occurred');
      // 执行双击事件的操作
    });

    fromEvent(element, 'touchstart').subscribe(() => {
      this.touchStartTime = Date.now();
    });

    fromEvent(element, 'touchend').subscribe(() => {
      const touchEndTime = Date.now();
      const touchDuration = touchEndTime - this.touchStartTime;
      if (touchDuration < 500) {
        console.log('Touch event occurred');
        // 执行触摸事件的操作
      }
    });
  }
}

以上是两种常见的在Angular中检测双击或触摸事件的方法，你可以根据自己的需求选择其中之一。