How to center vertically with Angular Flex Layout?

问题

I've created a simple login component and I'd like to vertically center, but I'm not sure how to achieve this using the Angular Flex Layout library.

app.component.html

<router-outlet></router-outlet>

<div fxLayout fxLayoutAlign="center center">
    <mat-card fxFlex="30%">
        <mat-card-title>Login</mat-card-title>

        <mat-card-content fxLayout="column">
            <mat-form-field>
                <input matInput placeholder="Username">
            </mat-form-field>
            <mat-form-field>
                <input matInput placeholder="Password">
            </mat-form-field>
        </mat-card-content>

        <button mat-raised-button color="accent">Login</button>
    </mat-card>
</div>

styles.scss

body{
    margin: 0;
    background-color: #eff2f5;
}

screenshot:

回答1:

Vertically centering elements with flexbox has no effect if the container element is the same height as its contents. Making the top level <div> in your example take up all the available vertical space with height: 100% (or some other Angular Flex Layout specific solution if available - maybe fxFlexFill) should center its contents right where you want them.

回答2:

If the parent element has a known height, all you need is fxLayoutAlign="center center":

<section class="intro-section">
  <div
   fxLayout="row"
   fxLayout.xs="column" 
   fxFlexFill
   fxLayoutAlign="center center"
  >
    <div fxFlex="50">
      <h1>MAYABI PORTFOLIO MULTIPURPOSE THEME</h1>
      <p>lorem ipsum dolor sit amt, consectet adop adipisicing elit, sed do eiusmod 
teporara incididunt ugt labore.</p>
    </div>
    <div fxLayout="50">
      hello
   </div>
  </div>
</section>

.intro-section {
   height: 500px;
}

回答3:

You have to specify the height of the fxLayout (Edited)

<div fxLayout="row" fxLayoutAlign="center center" class="row-height">
    <mat-card fxFlex="30%">
        <mat-card-title>Login</mat-card-title>

        <mat-card-content fxLayout="column">
            <mat-form-field>
                <input matInput placeholder="Username">
            </mat-form-field>
            <mat-form-field>
                <input matInput placeholder="Password">
            </mat-form-field>
        </mat-card-content>

        <button mat-raised-button color="accent">Login</button>
    </mat-card>
</div>

CSS

.row-height {
    height: 100%
}

来源：https://stackoverflow.com/questions/48196156/how-to-center-vertically-with-angular-flex-layout

标签

css

angular

css3

flexbox

angular-flex-layout