CanvasContext.save

解释：保存当前的绘图上下文。

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');
        // 保存默认填图样式
        canvasContext.setFillStyle('red');
        canvasContext.save();
        canvasContext.setFillStyle('blue');
        canvasContext.fillRect(10, 10, 150, 100);

        // 恢复之前保存的状态
        canvasContext.restore();
        canvasContext.fillRect(50, 50, 150, 100);

        canvasContext.draw();
    }
});