Question

我想从一个广角执行一个超出angular范围的函数，该代码与运行index.html的其他javascript文件一起在一个文件中，而这是此链接中的一个：

我可以通过在同一index.html中执行触发脚本的函数来使其正常工作，但不能正常工作。但是正如您可以想象的那样，当我尝试搜索具有特定ID的元素时，如果我不在应该执行脚本的页面中，则会出现以下错误：

声明该函数并在有角度的一侧执行

声明函数zoom（），并将脚本包装到具有该名称的函数中，然后在ngOninit中调用该函数，但它不起作用，因为它是JavaScript代码，甚至将代码以angular形式传递给函数并执行它在有角度的一面，但都不起作用。

因为只有javascript探针代码才能创建角度边的功能，但它也不起作用：

import { Component, OnInit } from '@angular/core';
import { ActivatedRoute } from '@angular/router';
import { BusquedaService } from '../../services/busqueda.service';
import { UsuarioService } from '../../services/usuario.service';

@Component({
  selector: 'app-adds-single-view',
  templateUrl: './adds-single-view.component.html',
  styles: []
})
export class AddsSingleViewComponent implements OnInit {

  postId: string;
  category: any;
  postItem: any;
  articulo: any;
  imgView = 'myimage';
  resultImg = 'myresult';
  constructor(private route: ActivatedRoute,
              public busqueda: BusquedaService,
              public _usuario: UsuarioService) {

    this.postId = this.route.snapshot.queryParams['postId'];
    this.category = this.route.snapshot.queryParams['cat'];

  }

  ngOnInit() {

    // call the magnify script
    magnify(this.imgView, 3)


    this.busqueda.busquedaEspecifica('ads-single-view', this.category, this.postId )
                 .subscribe((resp: any) => {
                    this.articulo = resp.articulos;
                    console.log(this.articulo);
                 });
  }

  // changeFirstImage(data) {
  //   console.log(data.attr)
  // }

  magnify(imgView, zoom) {
    var img, glass, w, h, bw;
    img = document.getElementById(imgView);

    /*create magnifier glass:*/
    glass = document.createElement("DIV");
    glass.setAttribute("class", "img-magnifier-glass");

    /*insert magnifier glass:*/
    img.parentElement.insertBefore(glass, img);

    /*set background properties for the magnifier glass:*/
    glass.style.backgroundImage = "url('" + img.src + "')";
    glass.style.backgroundRepeat = "no-repeat";
    glass.style.backgroundSize = (img.width * zoom) + "px " + (img.height * zoom) + "px";
    bw = 3;
    w = glass.offsetWidth / 2;
    h = glass.offsetHeight / 2;

    /*execute a function when someone moves the magnifier glass over the image:*/
    glass.addEventListener("mousemove", moveMagnifier);
    img.addEventListener("mousemove", moveMagnifier);

    /*and also for touch screens:*/
    glass.addEventListener("touchmove", moveMagnifier);
    img.addEventListener("touchmove", moveMagnifier);
    function moveMagnifier(e) {
      var pos, x, y;
      /*prevent any other actions that may occur when moving over the image*/
      e.preventDefault();
      /*get the cursor's x and y positions:*/
      pos = getCursorPos(e);
      x = pos.x;
      y = pos.y;
      /*prevent the magnifier glass from being positioned outside the image:*/
      if (x > img.width - (w / zoom)) {x = img.width - (w / zoom);}
      if (x < w / zoom) {x = w / zoom;}
      if (y > img.height - (h / zoom)) {y = img.height - (h / zoom);}
      if (y < h / zoom) {y = h / zoom;}
      /*set the position of the magnifier glass:*/
      glass.style.left = (x - w) + "px";
      glass.style.top = (y - h) + "px";
      /*display what the magnifier glass "sees":*/
      glass.style.backgroundPosition = "-" + ((x * zoom) - w + bw) + "px -" + ((y * zoom) - h + bw) + "px";
    }

    function getCursorPos(e) {
      var a, x = 0, y = 0;
      e = e || window.event;
      /*get the x and y positions of the image:*/
      a = img.getBoundingClientRect();
      /*calculate the cursor's x and y coordinates, relative to the image:*/
      x = e.pageX - a.left;
      y = e.pageY - a.top;
      /*consider any page scrolling:*/
      x = x - window.pageXOffset;
      y = y - window.pageYOffset;
      return {x : x, y : y};
    }
  }

}

有什么建议吗？

图像缩放插件角度

0 个答案: