Question

从2个小时开始我的头。因为我是角度JS的新手。

我有以下复选框，我希望选中复选框值推送到数组。如果我取消选中它应该从数组中弹出。我试过以下代码。但不工作......

    <label ng-repeat="r in MessageUserList">
    <input type="checkbox" name="selectList[]" value="{{r}}"
    ng-checked="selection.indexOf(r) > -1" ng-click="toggleSelection(r)"> 
{{r.member.first_name}}</label>

MessageUserList JSON从Web服务转发为：

{  
   "member":{  
      "member_id":8,
      "first_name":"Mr. David",
      "last_name":"Raz",
      "phone":122,
      "password":"dd",
      "mail":"sushil@asd.com",
      "system_date":"May 18, 2017 3:26:01 PM",
      "society_id":1,         
   },
   "flat_assign":"N"
}

在我的控制器中：

var selection=[];
 // Toggle selection for a given r by name
  $scope.toggleSelection = function toggleSelection(r) {
    var idx = $scope.selection.indexOf(r); //Error here indexOf(r)

    // Is currently selected
    if (idx > -1) {
        alert("Same checked");
      $scope.selection.splice(idx, 1);
    }

    // Is newly selected
    else {
        alert("New checked");
        $scope.selection.push(r);
        alert(JSON.stringify(selection));
    }
  }

收到错误： TypeError：无法读取未定义的属性'indexOf' 在b.toggleSelection（controllers.js：129）

Answer 1

试试这个，

<!DOCTYPE html>
<html>
<head>
    <script Src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.6.1/angular.js"></script>
    <script type="text/javascript">
        var app = angular.module('myApp', []);

        app.controller('surveyController', function($scope){
          $scope.MessageUserList =          [{  
           "member":{  
              "member_id":8,
              "first_name":"Mr. David",
              "last_name":"Raz",
              "phone":122,
              "password":"dd",
              "mail":"sushil@asd.com",
              "system_date":"May 18, 2017 3:26:01 PM",
              "society_id":1,         
          },
          "flat_assign":"N"
      }];

      $scope.selection = [];
 // Toggle selection for a given r by name
 $scope.toggleSelection = function toggleSelection(r) {
    var idx = $scope.selection.indexOf(r); //Error here indexOf(r)

    // Is currently selected
    if (idx > -1) {
        alert("Same checked");
        $scope.selection.splice(idx, 1);
    }

    // Is newly selected
    else {
        alert("New checked");
        $scope.selection.push(r);
        alert(JSON.stringify($scope.selection));
    }
}
});


</script>
</head>
<body ng-controller="surveyController" ng-app="myApp">
   <label ng-repeat="r in MessageUserList">
    <input type="checkbox" name="selectList[]" value="{{r}}"
    ng-checked="selection.indexOf(r) > -1" ng-click="toggleSelection(r)"> 
    {{r.member.first_name}}</label>
</body>
</html>

Answer 2

使用类似的东西：

// HTML

<label>Check me to check both: <input type="checkbox" ng-model="ch" ng-changed="saveChange()"></label>
<br/>
{{ch}}

// JS

.controller('yourCtrl', function($scope){
    $scope.ch = false;
    $scope.selection=[];
    $scope.saveChange = ()=>{
         $scope.selection.push(ch);
    }
})

Angular JS复选框无效

2 个答案: