use the iview component Message 
 to make a login request using axios, and display the error message according to the returned status code 
  this.$axios.post("http://wx.simplesay.xin/user/login", {
    email: this.formLogin["email"],
    password: this.formLogin["password"]
  }).then(function (response) {
    if (response.data.code === 10001) {
      this.$Message.info("")
    } else {
      console.log(response.data)
    }
  })
  
 but this will cause an error 
 if I create a method 
ok () {
  this.$Message.info("Clicked ok")
},
 if you use it in a Model component, you will not report an error. What is the reason? 
 < Modal 
    v-model="model_login"
    title="Common Modal dialog box title"
    :closable="false"
    :mask-closable="false"
    @on-ok="ok"
    @on-cancel="cancel">
						