如何在静态屏幕尺寸上动态更改Angular5中的fxFlex值？

Question

我有以下两列，我想动态交换/更改按钮的fxFlex值onClick。我知道，如果您调整屏幕大小，fxFlex.md / lg等将启动，我能够完成。但是我试图了解如何在某些事件（如按钮单击）上更改静态屏幕大小上的fxFlex值。

<div flexLayout="row">
  <div fxFlex="fxFlexForCol1" style="background-color: green">
    <button mat-raised-button (click)="swapViewableArea()">Click to enlarge view {{fxFlexForCol1}}</button>
  </div>
  <div fxFlex="fxFlexForCol2" style="background-color: red">
      <button mat-raised-button (click)="swapViewableArea()">Click to enlarge view {{fxFlexForCol2}}</button>
    </div>

  swapViewableArea() {
    const temp = this.fxFlexForCol1;
    this.fxFlexForCol1 = this.fxFlexForCol2;
    this.fxFlexForCol2 = temp;
  }

在单击按钮时，我看到fxFlexForCol1和fxFlexForCol2值已交换，但flexLayout在UI布局中没有反映相同的值

任何建议，请。

Answer 1

您需要将 fxFlex 绑定到您的属性。

将 fxFlex 替换为 [fxFlex]="property"

Answer 2

想通了！只需使用大括号即可！

<div flexLayout="row">
  <div fxFlex={{fxFlexForCol1}} style="background-color: green">
    <button mat-raised-button (click)="swapViewableArea()">Click to enlarge view {{fxFlexForCol1}}</button>
  </div>
  <div fxFlex={{fxFlexForCol2}} style="background-color: red">
    <button mat-raised-button (click)="swapViewableArea()">Click to enlarge view {{fxFlexForCol2}}</button>
  </div>
</div>