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我在構建離子3中的組件，它放置圖像網格並將它們與畫布疊加連接。我已經使用離子的離子網格，但是當我嘗試調整畫布的大小時，我無法找到容器的正確尺寸，因此畫布容器保持其初始尺寸。我想使它動態，所以我需要畫布具有與網格容器相同的大小。這裏是我的代碼：將畫布調整爲其父元素離子網格
<ion-content>
<ion-card>
<div ion-card-content>
<div ion-grid id= "container-graph">
<ion-row responsive-sm>
<canvas id="connection-canvas" style="position: absolute;"></canvas>
</ion-row>
<ion-row responsive-sm>
<ion-col col-6 text-center>
Generation
<img id="generation" src="../../assets/img/solar-panel.png">
</ion-col>
<ion-col col-6 text-center>
Grid
<img id="grid" src="../../assets/img/grid.png">
</ion-col>
</ion-row>
<ion-row responsive-sm>
<img id="inverter" src="../../assets/img/logo.png">
</ion-row>
<ion-row responsive-sm>
<ion-col col-6 text-center>
Battery
<img id="battery" src="../../assets/img/battery.png">
</ion-col>
<ion-col col-6 text-center>
Consumption
<img id="consumption" src="../../assets/img/house.png">
</ion-col>
</ion-row>
</div>
</div>
</ion-card>
<ion-card>
<ion-card-content>
{{description}}
</ion-card-content>
</ion-card>
</ion-content>
public drawGraphs (center:string, a:string, b:string, c:string, d:string){
var canvas: any = document.getElementById("connection-canvas");
var connectionGraph: any = document.getElementById("container-graph");
canvas.width = connectionGraph.clientWidth;
canvas.height = connectionGraph.clientHeight;
var elCenter = document.getElementById(center);
var contCenter = elCenter.getBoundingClientRect();
var elA = document.getElementById(a);
this.drawLine(elCenter,elA);
var elB = document.getElementById(b);
this.drawLine(elCenter,elB);
var elC = document.getElementById(c);
this.drawLine(elCenter,elC);
var elD = document.getElementById(d);
this.drawLine(elCenter,elD);
}