触摸事件包含一个属性，称为触及，其中包含所有可用的触摸点。您可以在MDN上阅读有关TouchEvents的更多信息，请访问 。

The touch events contain a property, called touches, which contains all the touch points available. You can read more about TouchEvents on MDN.

在您的情况下，您需要检查 touches 属性的长度：

In your case, you would need to check the length of the touches property:

$someElement.on('touchstart', function (e) {
    if (e.touches.length > 1)
        // ... do what you like here
});