import Taro from '@tarojs/taro'; import { Canvas, Button } from '@tarojs/components'; const handleShare = async (text) => { const context = Taro.createCanvasContext('canvas'); const qrCodeBase64 = text; const qrCodeImage = new Taro.Image(); qrCodeImage.src = data:image/png;base64,${qrCodeBase64}; qrCodeImage.onload = async () => { context.drawImage(qrCodeImage, 0, 0, 200, 200, 0, 0, 400, 400); context.draw(false, async () => { const tempFilePath = await Taro.canvasToTempFilePath({ canvasId: 'canvas', fileType: 'jpg', quality: 1, success: (res) => { Taro.showShareImageMenu({ path: res.tempFilePath, success() { console.log('分享成功'); }, fail(err) { console.log('分享失败', err); }, }); }, fail(err) { console.log('canvasToTempFilePath 失败', err); }, }); }); }; }; function SharePage() { const canvasRef = Taro.useRef(); return ( <> <Canvas ref={canvasRef} canvasId="canvas" style={{ width: '400px', height: '400px' }} /> <Button onClick={() => { handleShare('这里填写二维码的 base64 字符串'); }}>分享图片</Button> </> ); } export default SharePage; 代码有报错类型“TaroStatic”上不存在属性“Image”。

这个错误是因为 Taro 框架中没有 Image 类。你需要使用 Taro 的 loadImage 方法来创建一个图片对象，然后将其赋给 Image 对象的 src 属性。修改代码如下：

import Taro from '@tarojs/taro';
import { Canvas, Button } from '@tarojs/components';

const handleShare = async (text) => {
  const context = Taro.createCanvasContext('canvas');
  const qrCodeBase64 = text;
  const qrCodeImage = await Taro.loadImage(`data:image/png;base64,${qrCodeBase64}`);
  context.drawImage(qrCodeImage, 0, 0, 200, 200, 0, 0, 400, 400);
  context.draw(false, async () => {
    const tempFilePath = await Taro.canvasToTempFilePath({
      canvasId: 'canvas',
      fileType: 'jpg',
      quality: 1,
      success: (res) => {
        Taro.showShareImageMenu({
          path: res.tempFilePath,
          success() {
            console.log('分享成功');
          },
          fail(err) {
            console.log('分享失败', err);
          },
        });
      },
      fail(err) {
        console.log('canvasToTempFilePath 失败', err);
      },
    });
  });
};

function SharePage() {
  const canvasRef = Taro.useRef();

  return (
    <>
      <Canvas ref={canvasRef} canvasId="canvas" style={{ width: '400px', height: '400px' }} />
      <Button onClick={() => { handleShare('这里填写二维码的 base64 字符串'); }}>分享图片</Button>
    </>
  );
}

export default SharePage;

这样就可以正常运行了。