急急急canvasToTempFilePath: fail canvas is empty？
canvas作为自定义组件，保存画布提示canvasToTempFilePath: fail canvas is empty？ 在页面里面直接写是OK的，封装到组件内部就不能用 const that = this setTimeout(()=>{ Taro.canvasToTempFilePath({ canvasId: 'measure-angle', success(result) { console.log(111, result) }, fail(result) { console.log(222, result) } }, that) }, 500)
