CanvasContext.draw

解釋：將之前在繪圖上下文中的描述（路徑、變形、樣式）畫(huà)到 canvas 中。

方法參數(shù)

示例

圖片示例

代碼示例 1：reserve 為 false 

在開(kāi)發(fā)者工具中打開(kāi)

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

Page({
    onLoad() {
        const canvasContext = swan.createCanvasContext('myCanvas');
        canvasContext.setFillStyle('blue');
        canvasContext.fillRect(10, 10, 150, 100);
        canvasContext.draw();
        canvasContext.fillRect(30, 30, 150, 100);
        canvasContext.draw();
    }
});

圖片示例

代碼示例 2：reserve 為 true 

在開(kāi)發(fā)者工具中打開(kāi)

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

Page({
    onLoad() {
        const canvasContext = swan.createCanvasContext('myCanvas');
        canvasContext.setFillStyle('blue');
        canvasContext.fillRect(10, 10, 150, 100);
        canvasContext.draw();
        canvasContext.setFillStyle('red');
        canvasContext.fillRect(30, 30, 150, 100);
        canvasContext.draw(true);
    }
});

錯(cuò)誤碼

Android

iOS