用的文档的示例代码
const query = wx.createSelectorQuery()
query.select('#myCanvas')
.fields({ node: true, size: true })
.exec((res) => {
const canvas = res[0].node
const ctx = canvas.getContext('2d');
wx.chooseImage({
success: function(res){
ctx.drawImage(res.tempFilePaths[0], 0, 0, 150, 100)
ctx.draw()
}
})
})
https://developers.weixin.qq.com/miniprogram/dev/framework/ability/canvas.html#%E8%BF%9B%E9%98%B6%E4%BD%BF%E7%94%A8:~:text=%E8%BF%9B%E9%98%B6%E4%BD%BF%E7%94%A8-,%E7%BB%98%E5%88%B6%E5%9B%BE%E7%89%87,-%E5%9C%A8%E5%BC%80%E5%8F%91%E8%80%85这边测试正常,你怎么复现的
遇到一个新问题，ctx.filter 开发者工具上可以，真机上生成的图片没效果