Android 微信版本 8.0.37

let img = canvas.createImage();

const ctx = canvas.getContext('2d');

wx.downloadFile({

url: url, //网络图片

success:(res) => {

img.src = res.tempFilePath;

img.onload = () => {

let imgSize = this.canvasImgMode(mode,img,width,height);

ctx.drawImage(img, imgSize.sx,imgSize.sy,imgSize.sw,imgSize.sh, x, y, imgSize.width, imgSize.height);

reslove(imgSize);

}

},

fail(error) {

console.log(error)

reslove()

}

});

图片加载速度慢