CanvasContext.setFontSize

解釋：設(shè)置字體的字號(hào)。

方法參數(shù)

Number fontSize ：字體的字號(hào)。

示例 

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圖片示例

代碼示例

<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();
    }
});