var phone = this.phone;
var password = this.password;

var that = this;
 var phone = that .phone;
 var password = that .password;
this.$axios({
  method:'post',
  url:'api/user/logout',
  data:this.qs.stringify({phone:phone,password:password})
 }).then((res) =>{   //这里使用了ES6的语法
  if (res.data.status==200){
   alert(res.data.message);
   this.$emit('userSignIn', ''); //记录登录状态
   this.$router.replace({path: '/login'}); //成功后跳转
  }
 }).catch((error) =>{
  alert(error.data.message)  //请求失败返回的数据
 })