xzy/components/tki-qrcode/tki-qrcode.wxml

<view class="tki-qrcode">
    <canvas canvasId="{{cid}}" class="tki-qrcode-canvas" style="{{'width:'+cpSize+'px'+';'+'height:'+cpSize+'px'+';'}}"></canvas>
    <image class="img" hidden="{{!show}}" src="{{result}}" style="{{'width:'+cpSize+'px'+';'+'height:'+cpSize+'px'+';'}}"></image>
</view>