CanvasContext.setFontSize

解释：设置字体的字号。

方法参数

Number fontSize ：字体的字号。

示例 

在开发者工具中打开

图片示例

代码示例

<canvas canvas-id="myCanvas" class="myCanvas" />

Page({
    onLoad() {
        const canvasContext = swan.createCanvasContext('myCanvas');
        canvasContext.setFontSize(20);
        canvasContext.fillText('20', 20, 20);
        canvasContext.setFontSize(30);
        canvasContext.fillText('30', 40, 40);
        canvasContext.setFontSize(40);
        canvasContext.fillText('40', 60, 60);
        canvasContext.setFontSize(50);
        canvasContext.fillText('50', 90, 90);
        canvasContext.draw();
    }
});