HarmonyOS应用开发-ImageData对象练习

<!-- xxx.hml -->
<div>
    <canvas ref="canvas" style="width: 500px; height: 500px; background-color: #ffff00;"></canvas>
</div>

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//xxx.js
import prompt from '@system.prompt';
export default {
    onShow() {
        const el =this.$refs.canvas;
        const ctx = el.getContext('2d');
        ctx.fillRect(0,0,200,200)
        var imageData = ctx.createImageData(1,1)
        prompt.showToast({
            message:imageData,
            duration:5000
        })
    }
}

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