粘性工具栏材料2和sidenav [英] Sticky toolbar material 2 and sidenav

问题描述

最近开始学习材料2，然后发布.我的方法是像Youtube网站中那样进行辅助导航.左侧有一个汉堡包菜单，可展开/折叠侧面菜单. 代码:

Started recently learning material 2 and ran to issue. My approach is to do a sidenav as in Youtube website. There is a hamburger menu on left which expands/collapses side menu. Code:

<md-toolbar class="fixed-header">
     <button class="app-icon-button" (click)="start.toggle()">
          <i class="material-icons app-toolbar-menu">menu</i>
     </button>
</md-toolbar>

<md-sidenav-container>
    <md-sidenav #start class="app-sidebar" mode="side">test</md-sidenav>

    <div class="text">
      {{ text }}
    </div>
</md-sidenav-container>

现在看来我已经实现了布局，但是如果我滚动toolbar移动并且sidenav内容也移动，则定位不是fixed.

Now seems like I achieved the layout, but the positioning is not fixed, if i scroll toolbar moves and sidenav content also moves.

Edit:

后来我在角材料文档中找到了我一直在寻找的示例:

On angular material documentation I later found the example which one I have been looking for:

https://stackblitz.com/angular/rmjxrpxdgmx ?file = app％2Fsidenav-sensitive-example.html

如果链接将被删除，则代码如下:

if link will be removed, here is the code:

HTML File:

<div class="example-container" [class.example-is-mobile]="mobileQuery.matches" *ngIf="shouldRun">
  <mat-toolbar color="primary" class="example-toolbar">
    <button mat-icon-button (click)="snav.toggle()"><mat-icon>menu</mat-icon></button>
    <h1 class="example-app-name">Responsive App</h1>
  </mat-toolbar>

  <mat-sidenav-container class="example-sidenav-container"
                         [style.marginTop.px]="mobileQuery.matches ? 56 : 0">
    <mat-sidenav #snav [mode]="mobileQuery.matches ? 'over' : 'side'"
                 [fixedInViewport]="mobileQuery.matches" fixedTopGap="56">
      <mat-nav-list>
        <a mat-list-item routerLink="." *ngFor="let nav of fillerNav">{{nav}}</a>
      </mat-nav-list>
    </mat-sidenav>

    <mat-sidenav-content>
      <p *ngFor="let content of fillerContent">{{content}}</p>
    </mat-sidenav-content>
  </mat-sidenav-container>
</div>

TS File:

import {MediaMatcher} from '@angular/cdk/layout';
import {ChangeDetectorRef, Component, OnDestroy} from '@angular/core';

/** @title Responsive sidenav */
@Component({
  selector: 'sidenav-responsive-example',
  templateUrl: 'sidenav-responsive-example.html',
  styleUrls: ['sidenav-responsive-example.css'],
})
export class SidenavResponsiveExample implements OnDestroy {
  mobileQuery: MediaQueryList;

  fillerNav = Array.from({length: 50}, (_, i) => `Nav Item ${i + 1}`);

  fillerContent = Array.from({length: 50}, () =>
      `Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut
       labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco
       laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in
       voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat
       cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.`);

  private _mobileQueryListener: () => void;

  constructor(changeDetectorRef: ChangeDetectorRef, media: MediaMatcher) {
    this.mobileQuery = media.matchMedia('(max-width: 600px)');
    this._mobileQueryListener = () => changeDetectorRef.detectChanges();
    this.mobileQuery.addListener(this._mobileQueryListener);
  }

  ngOnDestroy(): void {
    this.mobileQuery.removeListener(this._mobileQueryListener);
  }
}

CSS File:

.example-container {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}

.example-is-mobile .example-toolbar {
  position: fixed;
  /* Make sure the toolbar will stay on top of the content as it scrolls past. */
  z-index: 2;
}

h1.example-app-name {
  margin-left: 8px;
}

.example-sidenav-container {
  /* When the sidenav is not fixed, stretch the sidenav container to fill the available space. This
     causes `<mat-sidenav-content>` to act as our scrolling element for desktop layouts. */
  flex: 1;
}

.example-is-mobile .example-sidenav-container {
  /* When the sidenav is fixed, don't constrain the height of the sidenav container. This allows the
     `<body>` to be our scrolling element for mobile layouts. */
  flex: 1 0 auto;
}

推荐答案

要使工具栏位于顶部，请使用position: fixed和z-index: 999.为了将sidenav保持在可滚动区域之外，需要将其移到md-sidenav-container

To keep the toolbar on top, use position: fixed and z-index: 999. To keep the sidenav outside of scrollable area, it needs to be taken outside of md-sidenav-container

感谢创建plnkr演示，它对快速找到解决方案很有帮助.这是修改后的演示.

Thanks for creating a the plnkr demo, it helped a lot to quickly find a solution. Here's the modified demo.

app.component.html:

<md-toolbar class="fixed-header">
      <button class="app-icon-button" (click)="start.toggle()">
      <i class="material-icons app-toolbar-menu">menu</i>
      </button>
</md-toolbar>

<md-sidenav-container >
    <div class="text" style="min-height: 99vh">
      {{ text }}
    </div>
</md-sidenav-container>

<md-sidenav #start class="app-sidebar side-nav-style" mode="side" >
        test
</md-sidenav>

app.component.css:

.fixed-header {
  top: 0;
  position: fixed;
  z-index:999;

}

.text { 
  width: 5px;
}

.side-nav-style{
  background-color: grey;
  width: 6em;
  margin-top:62px;
  position: fixed
}

让我知道您是否正在寻找

Let me know if that's what you are looking for.

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