具体来说将前台回到的十进制流切换为base64文档格式,不过难题又来了,聚合的base64相片,在应用软件上要恒定表明在画笔上,但在真机内难以表明。
历经腾讯辨认出两个配套措施,canvas上须要留存到邻近地区聚合两个交互式的文档再去图形
间接上标识符:
const fsm = wx.getFileSystemManager();
let showImgData = wx.arrayBufferToBase64(res.data);
//将十进制流转化成为base
showImgData = showImgData.replace(/\ +/g, ""); // 拿掉字符方式
showImgData = showImgData.replace(/[\r\n]/g, "");
const buffer = wx.base64ToArrayBuffer(showImgData);
const timestamp = Date.parse(new Date());
const fileName = `${wx.env.USER_DATA_PATH}/share_img_${timestamp}.png`;
fsm.writeFileSync(fileName, buffer, binary);//处置顺利完成
油画:
const ctx = wx.createCanvasContext(myCanvas);
ctx.drawImage(showImgData , 280/ 2 * w, 570/ 2 * w, 90/ 2 * w, 90/ 2 * w)