AI助手支持GPT4.0
canvas组件在pc上不支持吗?Is the canvas component not supported on the pc?
canvas组件在pc上不支持吗?
Page({ onReady() { const query = wx.createSelectorQuery() query.select('#canvas') .fields({ node: true, size: true }) .exec((res) => { const canvas = res[0].node const ctx = canvas.getContext('2d') const dpr = wx.getSystemInfoSync().pixelRatio canvas.width = res[0].width * dpr canvas.height = res[0].height * dpr ctx.scale(dpr, dpr) ctx.fillRect(0, 0, 100, 100) }) }})直接用了文档上的代码,在pc小程序上没有效果。res[0].node 为nullpc不支持canvas吗?
Page({ onReady() { const query = wx.createSelectorQuery () query.select ('#canvas') .fields({ node: true, size: true }) .exec((res) => { const canvas = res[0].node const ctx = canvas.getContext ('2d') const dpr = wx.getSystemInfoSync ().pixelRatio canvas.width = res[0].width * dpr canvas.height = res[0].height * dpr ctx.scale (dpr, dpr) ctx.fillRect (0, 0, 100, 100)}) directly uses the code in the document, which has no effect on the PC small program. Res [0]. Node nullpc does not support canvas?
目前暂不支持pc端