vuejs实现ready函数加载完之后执行某个函数的方法

<div class="row" id="app">
  <div class="col-sm-12 col-md-12 main">
   <table class="table table-bordered table-striped">
    <thead>
    <tr>
     <th><input type="checkbox" id="checkAll" name="checkAll" /></th>
     <th>日期</th>
     <th>任务</th>
     <th>是否执行</th>
     <th>执行结果</th>
     <th>影响行数</th>
     <th>执行时间</th>
     <th>执行时长</th>
     <th>成功率</th>
     <th>操作</th>
    </tr>
    </thead>
    <tbody id="trs">
    <tr v-for="td in tds">
     <td><input type="checkbox" name="checkItem" /></td>
     <td>{{td.date}}</td>
     <td>{{td.job}}</td>
     <td>{{td.is_done==0"td.is_done==0">
     </td>
     <td v-if="td.is_done==1">
      <button v-on:click="rerun($index,td.monitor_id)" type="button" class="btn btn-default btn-xs"
        style="padding:1px 10px;margin-top:-3px;margin-bottom:-2px;">重跑
      </button>
     </td>
    </tr>
    </tbody>
   </table>
  </div>
  <!--/.main -->
 </div>

Vue.nextTick(function () {
 alert('new message'); // true
})

vm.$nextTick(function () {
 alert('new message'); // true
})

var vm = new Vue({
  el: '#app',
  ready: function () {
   $.getJSON("/main/getMonitor", {"beginDate": getTheDate(-2), "endDate": getTheDate(0)}, function (result) {
    vm.$set('tds', result);
   });
  },
  data: {
   start: getTheDate(-2),
   end: getTheDate(0),
   isupdate: 0
  },
// computed: {
// // 一个计算属性的 getter
// tds: function () {
//  var myr="";
//  $.getJSON("/main/getMonitor", {"beginDate": getTheDate(-2),"endDate": getTheDate(0)}, function (result) {
//  myr= result;
//  });
//  return myr;
// }
// },
  methods: {
   rerun: function (index, monitor_id) {
    var button = $('#trs').children().eq(index).children().eq(9).children().eq(0);
    button.prop('disabled', true);
    button.html('重跑中<span class="dotting"></span>');
//    $.getJSON("http://m.o2.qq.com/Api/rerunMonitor", {"monitorID": monitor_id}, function (result) {
//     console.log(result);
//     vm.isupdate=(this.isupdate==0"http://m.o2.qq.com/Api/rerunMonitor",
     // The name of the callback parameter, as specified by the YQL service
     jsonp: "callback",
     // Tell jQuery we're expecting JSONP
     dataType: "jsonp",
     // Tell YQL what we want and that we want JSON
     data: {
      monitorID: monitor_id
     },
     // Work with the response
     success: function (response) {
      console.log(response); // server response
      vm.isupdate = (vm.isupdate == 0 "/main/getMonitor", {"beginDate": val, "endDate": this.end}, function (result) {
   vm.tds = result;
  });
 })
 vm.$watch('end', function (val) {
  $.getJSON("/main/getMonitor", {"beginDate": this.start, "endDate": val}, function (result) {
   vm.tds = result;
  });
 })
 vm.$watch('isupdate', function (val) {
  $.getJSON("/main/getMonitor", {"beginDate": this.start, "endDate": this.end}, function (result) {
   vm.tds = result;
  });
 })
 vm.$watch('tds',function(val){
  vm.$nextTick(function() {
   initTableCheckbox();
  });
 })