我无法通过JS代码捕获iPad设备的IP地址。这在Windows系统中工作正常
下面是代码：

var findIP = new Promise(r => {
  var w = window,
    a = new(w.RTCPeerConnection || w.mozRTCPeerConnection || w.webkitRTCPeerConnection)({
      iceServers: []
    }),
    b = () => {};
  a.createDataChannel("");
  a.createOffer(c => a.setLocalDescription(c, b, b), b);
  a.onicecandidate = c => {
    try {
      c.candidate.candidate.match(/([0-9]{1,3}(\.[0-9]{1,3}){3}|[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7})/g).forEach(r)
    } catch (e) {}
  }
})
findIP.then(function(ip) {
  console.log(ip);
})