CanvasContext.draw

收藏

我的收藏

CanvasContext.draw(reserve, callback)

<!-- index.ttml -->
<button type="primary" size="default" bindtap="draw">开始绘制</button>
<canvas canvas-id="myCanvas"></canvas>

Page({
  draw() {
    const canvasCtx = tt.createCanvasContext("myCanvas");
    canvasCtx.setFillStyle("red");
    canvasCtx.fillRect(10, 10, 100, 100);
    canvasCtx.draw();
  },
});

<!-- index.ttml -->
<button type="primary" size="default" bindtap="draw">继续绘制</button>
<canvas canvas-id="myCanvas"></canvas>

Page({
  onReady() {
    const canvasCtx = tt.createCanvasContext("myCanvas");
    canvasCtx.setFillStyle("red");
    canvasCtx.fillRect(10, 10, 100, 100);
    canvasCtx.draw();
    this.canvasCtx = canvasCtx;
  },
  draw() {
    this.canvasCtx.setFillStyle("black");
    this.canvasCtx.fillRect(50, 50, 100, 100);
    this.canvasCtx.draw(true);
  },
});