<button bindtap="phonecall">拨打电话</button>
// js
Page({
phonecall:function(){
wx.makePhoneCall({
phoneNumber: ‘1340000‘ //仅为示例，并非真实的电话号码
})
}
})
phonecall: function (e) { util.phonecall(‘4000300011‘); },
原文：https://www.cnblogs.com/wuqilang/p/12076030.html