Angularjs ng-if無法正常工作

如果有人能夠幫助解釋爲什麼我的複選框Voted：無法控制ng-if指令嗎？但是，對於保留HTML是可行的：複選框Angularjs ng-if無法正常工作

<p> 
    <li ng-repeat="x in info"> 
    {{x.name}} Voted: 
    <input type="checkbox" 
     ng-model="myVar" 
     ng-init="myVar =true"> 
    </li> 
</p> 

<input type="checkbox" ng-model="myVar" ng-init="myVar =true"> 
<h1 ng-if="myVar">Welcome2</h1> 
<script> 
    var app = angular.module("myApp", []); 
    app.controller("myCtrl", function($scope) { 
    $scope.myObj = { 
     "color": "white", 
     "background-color": "coral", 
     "font-size": "60px", 
     "padding": "50px" 
    } 

    $scope.info = [{ 
     name: 'woon', 
     age: '18' 
    }, 
    { 
     name: 'amir', 
     age: '17' 
    }]; 
    }); 
</script>

來源

2016-11-23 Laravel Technologies

爲什麼結合'myVar'多次，它在這兩個重複迴路以及下面的輸入？ – Igor