如何以编程方式启动 Vuetify 对话框并等待响应

Question

我对 Vue.js 和 Vuetify 相当陌生（使用 AngularJS 好几年了，但我们公司正在转向 Vue.js）。我想要完成的是，当用户单击“登录”按钮时，它会进行一些检查（即用户名不能为空）并启动 Vuetify 对话框以提醒用户。我知道 Vuetify 有一些内置的验证，但正在寻找一些更强大的东西，我可以等待响应（即当我需要等待诸如我可以使用您的历史记录/位置之类的东西时）。

基本上想做：

if (!userName){
    userName = await mbox('You must Enter your Username');
    return
}

或者

var mProceed = await mbox('Can we use your location for awesome stuff?');

其中 mbox（一个简单的消息框弹出框）是一个函数，它返回一个 promise，以编程方式加载一个 vue 组件，将它添加到 dom，然后等待响应。

IE

async function mbox (mText) {
    // load dialog component here and set message passed in
    // How Do I load the template / wait for it?
    return dialogResult

}

Vue 组件看起来像（按钮标题和文本是我传递给我的 mbox 函数的变量）：

<template>
<v-layout row justify-center>
<v-dialog
  v-model="dialog"
  max-width="290"
>
  <v-card>
    <v-card-title class="headline">Use Google's location service?</v-card-title>

    <v-card-text>
      Let Google help apps determine location. This means sending anonymous location data to Google, even when no apps are running.
    </v-card-text>

    <v-card-actions>
      <v-spacer></v-spacer>

      <v-btn
        color="green darken-1"
        flat="flat"
        @click="dialog = false"
      >
        Disagree
      </v-btn>

      <v-btn
        color="green darken-1"
        flat="flat"
        @click="dialog = false"
      >
        Agree
      </v-btn>
    </v-card-actions>
  </v-card>
</v-dialog>
</v-layout>
</template>

我很好地编辑模板/为 vue 组件添加脚本我只是不确定如何通过返回承诺并等待响应的方法调用它？

Answer 1

最终这样解决了：

我有一个名为 mbox （返回承诺）的方法，它创建组件的一个实例，将其添加到 DOM，然后监视该组件上的属性以了解用户选择了哪个选项。一旦用户选择了一个选项，就解决承诺

我的 mbox 方法：

import MBOX from './components/mbox.vue';
import _Vue from 'vue';
export default {

mbox(mText, mTitle, mBtnCap1, mBtnCap2, mBtnCap3){
    return new Promise(async (resolve, reject) => {
        if (!mTitle){
            mTitle = 'My Title';
        }
        if (!mBtnCap1){
            mBtnCap1 = 'OK';
        }

        // I'm combining a bunch of stuff to make this work.
        // First, create the vue component
        var mboxInstance = _Vue.extend(MBOX); // mbox component, imported at top of Sublib
        var oComponent = new mboxInstance({ 
            propsData: { 
                msg: mText, 
                title: mTitle, 
                btnCap1: mBtnCap1, 
                btnCap2: mBtnCap2, 
                btnCap3: mBtnCap3,
                retval: 0
                }
        }).$mount();

        // now add it to the DOM
        var oEl = document.getElementById('app').appendChild(oComponent.$el);

        // NOTE: couldn't get it to work without adding a 'button' to activate it
        // progrmatically click it and make the button invisible
        // document.getElementById('mbox_btn_launch').click();
        var oLuanchBtn = document.getElementById('mbox_btn_launch');
        oLuanchBtn.style.visibility = 'hidden';
        oLuanchBtn.click();

        // Add a listener so we can get the value and return it
        oComponent.$watch('retval', function(newVal, oldVal){
            // this is triggered when they chose an option
            // Delete the component / element now that I'm done
            oEl.remove();
            resolve(Number(newVal));
        })
    }); // promise
}, // mbox
}

我的 MBOX 组件：

<template>
<v-dialog max-width="290" persistent v-if="showMbox">
    <template v-slot:activator="{on}">
        <v-btn id="mbox_btn_launch" v-on="on">
            Test
        </v-btn>
    </template>
    <v-card>
        <v-card-title>{{title}}</v-card-title>
        <v-card-text>{{msg}}</v-card-text>
        <v-card-actions>
            <v-spacer></v-spacer>
            <v-btn v-if="btnCap1" @click="btnClicked('1')">{{btnCap1}}</v-btn>
            <v-btn v-if="btnCap2" @click="btnClicked('2')">{{btnCap2}}</v-btn>
            <v-btn v-if="btnCap3" @click="btnClicked('3')">{{btnCap3}}</v-btn>
        </v-card-actions>
    </v-card>
</v-dialog>
</template>
<script>
export default {
    name: 'mbox',
    data: () => ({
        showMbox: true    
    }),
    props: [
        // these can be passed in, the 'data' stuff can't
        'msg',
        'title',
        'btnCap1',
        'btnCap2',
        'btnCap3',
        'retval' // watches this so we know when they clicked something
    ],
    created(){    
        this.showMbox = true;
    }, 
    methods: {
    btnClicked: function(mBtnClicked){
        // mBtnClicked = Char. Has to be a character in order for it to pass it in. Not sure why, numerics didn't work
        mBtnClicked = Number(mBtnClicked);
        this.retval = mBtnClicked; // watcher in Sublib will detect this value has changed
        this.showMbox = false;
    } // btnClicked
} // methods
} // export default
</script>
<style scoped>
</style>

然后我可以这样称呼它：

var mChoice = await mbox('What do you want to do?', 'Title', 'Option 1', 'Option 2');

或者对于简单的“验证”提示：

if (!userName){
    mbox('You must enter a username');
    return;
}

Answer 2

我的解决方案。

页面.vue

<template>
  <v-container>
    <v-layout text-center wrap>
      <v-flex xs12>

        <v-btn v-on:click="open_dlg">Dlg Wrapper</v-btn>

        <dlg-wrapper ref="dlg">
          <dlg-frame title="Dialog" message="Message"></dlg-frame>
        </dlg-wrapper>

      </v-flex>
    </v-layout>
  </v-container>
</template>

<script>
import DlgWrapper from "@/components/DlgWrapper";
import DlgFrame from "@/components/DlgFrame";

export default {
  data: () => {
    return {};
  },

  methods: {
    open_dlg: function(event) {
      this.$refs.dlg.open().then(result => {
        console.log("Result:", result);
      });
    }
  },

  components: {
    DlgWrapper,
    DlgFrame
  }
};

</script>

DlgWrapper.vue

<template>
  <div>
    <v-dialog
      v-model="dialog"
      persistent
      :width="options.width"
      v-bind:style="{ zIndex: options.zIndex }"
    >
      <slot></slot>
    </v-dialog>
  </div>
</template>

<script>
export default {
  name: "dlg-wrapper",

  data: () => ({
    dialog: false,
    options: {
      width: 400,
      zIndex: 200
    },
    resolve: null,
    reject: null
  }),

  methods: {
    open(options) {
      this.dialog = true;
      this.options = Object.assign(this.options, options);
      return new Promise((resolve, reject) => {
        this.resolve = resolve;
        this.reject = reject;
      });
    },
    agree() {
      this.resolve(true);
      this.dialog = false;
    },
    cancel() {
      this.resolve(false);
      this.dialog = false;
    }
  },

  provide: function() {
    return { agree: this.agree, cancel: this.cancel };
  }
};
</script>

DlgFrame.vue

<template>
  <v-card dark>
    <v-card-title v-show="!!title">{{ title }}</v-card-title>
    <v-card-text v-show="!!message">{{ message }}</v-card-text>
    <v-card-actions>
      <v-btn @click="agree">OK</v-btn>
      <v-btn @click="cancel">NO</v-btn>
    </v-card-actions>
  </v-card>
</template>

<script>
export default {
  name: "dlg-frame",
  props: ["title", "message"],
  data: () => ({}),
  inject: ["agree", "cancel"],
  methods: {}
};
</script>

祝你好运！