需要绘制高清大图使用 canvas2d 在 真机(ios跟安卓)设置尺寸大于4000px时，会卡住不执行，请问该怎么处理？ 代码片段：https://developers.weixin.qq.com/s/tzKNiDmP7Urx wx.showLoading({ title: '绘制中', }) wx.createSelectorQuery().select('#canvas') .fields({ node: true, size: true }) .exec(function (res) { let canvas = res[0].node let context = canvas.getContext('2d'); canvas.width = 5000; canvas.height = 5000; wx.hideLoading() const image = canvas.createImage(); image.onload = () => { context.drawImage(image, 0, 0, 5000, 5000); // 生成图片 wx.canvasToTempFilePath({ x: 0, y: 0, width: 5000, height: 5000, destWidth: 2500, destHeight: 2500, canvas: canvas, quality: 1, fileType: 'jpg', success(res) { console.log(res.tempFilePath) }, fail(err) { console.log(err) } }); } image.onerror = function (ret) { return console.log(ret) } image.src = "../static/img.png" // 要加载的图片 url })