canvas uniapp使用canvas生成画布图片,并下载至本地,安卓IOS小程序通用 page.vue中引入<drawPicture ref="myDraw" :drawData="drawData" :canvasWidth="canvasWidth" :canvasHeight="canvasHeight"></drawPicture>data中定义data() { return { drawData:[], canvasWidth:656, canvasHeight:350, } } ...