3

我是 Angular 4 的新手,并试图找到一个用于平移缩放的库。我在 npm 上找不到任何包。我尝试在我的项目中添加 jquery,然后添加 jquery.panzoom,但是因为 jquery.panzoom 是用 JavaScript 编写的,而我的 Angular 项目是在 TypeScript 中,所以 jquery.panzoom 没有@types,所以它不起作用。

我遵循的步骤

1) npm install --save jquery

2) npm install --save @types/jquery

3)从'jquery'导入*作为$;

   //till here jquery works fine
    $('.sample').click(function () {
      alert('div clicked.');
    });

3) npm install --save jquery.panzoom

   $('#panzoomDiv').panzoom(
      {
        $zoomIn: $('.zoom-in'),
        $zoomOut: $('.zoom-out'),
        $zoomRange: $('.zoom-range'),
        $reset: $('.reset')
      } 
    );

在这里我得到了错误

src/app/app.component.ts (22,22): Property 'panzoom' does not exist on type 
'JQuery<HTMLElement>'.

然后在经历了这个之后,我添加了

interface JQuery {
  panzoom(options: any): any;
}

到我的 typings.d.ts 文件。现在它确实编译但给出了这个运行时错误

 ERROR TypeError: __WEBPACK_IMPORTED_MODULE_1_jquery__(...).panzoom is not a function
at AppComponent.webpackJsonp.117.AppComponent.ngOnInit (app.component.ts:22)
at checkAndUpdateDirectiveInline (core.es5.js:10848)
at checkAndUpdateNodeInline (core.es5.js:12349)
at checkAndUpdateNode (core.es5.js:12288)
at debugCheckAndUpdateNode (core.es5.js:13149)
at debugCheckDirectivesFn (core.es5.js:13090)
at Object.eval [as updateDirectives] (AppComponent_Host.html:1)
at Object.debugUpdateDirectives [as updateDirectives] (core.es5.js:13075)
at checkAndUpdateView (core.es5.js:12255)
at callWithDebugContext (core.es5.js:13475)

有人可以将我重定向到正确的解决方案或不同的缩放库。

这样的东西

更新

试过这个方法,还是不行。

    <div style="display:block; padding: 10px;">
      <button id="btn-zoom-in-workspace"
              class="zoom-out">Zoom Out
      </button>
      <button id="btn-zoom-null-workspace"
              class="reset">Reset
      </button>
      <button id="btn-zoom-out-workspace"
              class="zoom-in">Zoom In
      </button>
      <input type="number" class="zoom-range">
   </div>
   <div id="panzoomDiv" #panzoomDiv>
   <div>

    import * as $ from 'jquery';

    @Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
    })
    export class AppComponent implements  AfterViewInit {
    @ViewChild('panzoomDiv') panzoomDiv: ElementRef;
     ngAfterViewInit(): void {
        if (this.panzoomDiv)
           $(this.panzoomDiv.nativeElement).panzoom({
                $zoomIn: $('.zoom-in'),
                $zoomOut: $('.zoom-out'),
                $zoomRange: $('.zoom-range'),
                $reset: $('.reset')
        });
     }
  }
4

1 回答 1

3
  • npm install --save jquery

  • 安装 jquery Panzoom

将这些添加到 angular-cli.json 的脚本数组中

"scripts": [ 
"../node_modules/jquery/dist/jquery.min.js", 
"../node_modules/jquery.panzoom/dist/jquery.panzoom.min.js" 
],

模板中

   <div style="display:block; padding: 10px;">
      <button id="btn-zoom-in-workspace"
              class="zoom-out" #reference>Zoom Out
      </button>
      <button id="btn-zoom-null-workspace"
              class="reset" #reference>Reset
      </button>
      <button id="btn-zoom-out-workspace"
              class="zoom-in" #reference>Zoom In
      </button>
      <input type="number" class="zoom-range">
   </div>
   <div id="panzoomDiv" #panzoomDiv>
   <div>

组件中使用这个

declare var $ : any;

@ViewChild('panzoomDiv') panzoomDiv: ElementRef;
//get all the other element references using elementref and use it in function below
     ngAfterViewInit(): void {
        if (this.panzoomDiv)
           $(this.panzoomDiv.nativeElement).panzoom({
                $zoomIn: $(#reference),
                $zoomOut: $(#reference),
                $zoomRange: $(#reference),
                $reset: $(#reference)
        });
     }
于 2017-08-28T11:34:02.183 回答