Question

当我使用Angular 1.6时，会在页面加载时选中一个复选框，但是当我单击该复选框时，复选框模型不会更新。为什么呢？

代码：

  var app = angular.module("demo",[]);
  app.controller("ctrl",["$scope",function($scope){
    var data = {
      C_DJB:{VAL:'1'}
    }
      $scope.obj = data;

  }])

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<!DOCTYPE html>
<html lang="zh-cn">
    <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
        <meta name="description" content="test">
        <meta name="author" content="">
        <title>Page Title</title>

    </head>
    <body ng-app="demo" ng-controller="ctrl">
        <h1>Body</h1>
        <input  type="checkbox" ng-model="obj.C_DJB.VAL" ng-true-value="1" ng-false-value="0" ng-checked="obj.C_DJB.VAL=='1'" /> <br/>
        <input type="checkbox" ng-model="obj.C_DJB.VAL" ng-true-value="1" ng-false-value="0" ng-checked="obj.C_DJB.VAL=='1'" /> <br/>
        {{obj.C_DJB.VAL}}
 

    </body>
</html>

Answer 1

当您取消勾选复选框时，正在打印的值从1更改为0，这意味着模型正在更新。

Answer 2

您需要删除

ng-checked="obj.C_DJB.VAL=='1'"

正如您在控制器中定义的那样

 var data = {
  C_DJB:{VAL:'1'}
}

所以默认情况下会选中复选框。现在，当您选中或取消选中该复选框时，该值将相应更新。问题是，当您给出ng-checked =“obj.C_DJB.VAL =='1'”时，无论您勾选还是取消勾选复选框，checbox值始终为1。

Answer 3

var app = angular.module("demo",[]);
  app.controller("ctrl",["$scope",function($scope){
    var data = {
      C_DJB:{VAL:'1'}
    }
      $scope.obj = data;

  }])

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<!DOCTYPE html>
<html lang="zh-cn">
    <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
        <meta name="description" content="test">
        <meta name="author" content="">
        <title>Page Title</title>

    </head>
    <body ng-app="demo" ng-controller="ctrl">
        <h1>Body</h1>
        <input  type="checkbox" ng-model="obj.C_DJB.VAL" ng-true-value="1" ng-false-value="0" ng-checked="obj.C_DJB.VAL=='1'" /> <br/>
        <input type="checkbox" ng-model="obj.C_DJB.VAL" ng-true-value="1" ng-false-value="0" ng-checked="obj.C_DJB.VAL=='1'" /> <br/>
        {{obj.C_DJB.VAL}}
 

    </body>
</html>

Answer 4

＆＃13;

  var app = angular.module("demo",[]);
  app.controller("ctrl",["$scope",function($scope){
    var data = {
      C_DJB:{VAL:'0'}
    }
      $scope.obj = data;

  }])

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<!DOCTYPE html>
<html lang="zh-cn">
    <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
        <meta name="description" content="test">
        <meta name="author" content="">
        <title>Page Title</title>

    </head>
    <body ng-app="demo" ng-controller="ctrl">
        <h1>Body</h1>
        <input  type="checkbox" ng-model="obj.C_DJB.VAL" ng-true-value="1" ng-false-value="0"" /> <br/>
        <input type="checkbox" ng-model="obj.C_DJB.VAL" ng-true-value="1" ng-false-value="0"" /> <br/>
        {{obj.C_DJB.VAL}}
 

    </body>
</html>

＆＃13;

选中时，AngularJS复选框模型不会更新

4 个答案: