Question

****注意我删除了一些其他功能，以便更快地读取代码。我无法清除表格。当我点击带有取消功能的按钮时。我以为我可以设置默认表单，但这并没有什么区别。

<form  name="myForm" novalidate ng-submit="submit()"> 
    <table class="mealCost"> 

        <!-- descriptions -->
        <tr> 
            <td> Base Meal Price: </td>
            <td><input type="number" name="price" ng-model="mealPrice" required></td>
        </tr>
        <!-- waiter puts in the info -->
        <tr> 
            <td> Tax Rate: % </td>
            <td><input type="number" step="0.01" name="tax" ng-model="mealTax" required></td>

        </tr>

        <tr> 
            <td> Tip Percentage: % </td>
            <td><input type="number"  name="tip" step="0.01" ng-model="tipPercent" required></td>

        </tr>

    </table>

    <p class="userResponse"> 
    <input type="submit" value="Submit"> 
    <!-- <input id="cancel" type="submit" value="Cancel" ng-submit="cancel(original)"> -->
    <button ng-click="cancel()">Start Over</button>
    </p>

</form>

这是我的javascript我试图使用按钮命令将我的表单设置为$ setPristine。我设置默认表单会有所帮助，但提交

时没有任何反应

var app = angular.module('myApp',[]).
    controller('costController', function($scope) {
        // $scope.ready= false;
        $scope.mealPrice ="" ;
        $scope.mealTax = 0.05;
        $scope.tipPercent =0.05; 
        //  possibly could do 

        var defaultForm={
            price: "",
            tax: "",
            tip:""
        }

$scope.cancel = function() {
            $scope.myForm.$setPristine();
            $scope.user = angular.copy(defaultForm);
            console.log('empty');
        }

Answer 1

我认为你错了。

$ setPristine：

＆＃34;可以调用此方法来删除＆＃39; ng-dirty＆＃39; class并将表单设置为其原始状态（ng-pristine类）。此方法还将传播到此表单中包含的所有控件。＆＃34;

所以这只清除了类而不是$ scope变量。您确实重置了$ scope.user变量，可以说：

添加＆＃39;用户。＆＃39;在Html中的每个模型前面

ng-model="user.tipPercent"
ng-model="user.mealTax"
ng-model="user.mealPrice"

在你的JS中替换它：

// $scope.ready= false;
$scope.mealPrice ="" ;
$scope.mealTax = 0.05;
$scope.tipPercent =0.05; 
//  possibly could do 

var defaultForm={
    price: "",
    tax: "",
    tip:""
}

$scope.cancel = function() {
    $scope.myForm.$setPristine();
    $scope.user = angular.copy(defaultForm);
    console.log('empty');
}

到此：

var defaultForm = {
    mealPrice : "",
    mealTax : 0.05,
    tipPercent : 0.05
}

$scope.user = angular.copy(defaultForm);

$scope.cancel = function () {
    $scope.myForm.$setPristine();
    $scope.user = angular.copy(defaultForm);
    console.log('empty');
}

Answer 2

$scope.master = {};

$scope.reset = function(form) {

      if (form) {
          form.$setPristine();
           $scope.user = angular.copy($scope.master);
         form.$setUntouched();
      }

Answer 3

如果ng-model绑定到$scope.user.price，$scope.user.tax和$scope.user.tip，这将有效。但是，它们必须$scope.price，$scope.tax和$scope.tip。

设置表单$pristine仅标记未被用户修改的值。它实际上并没有改变这些值。

解决方案A：

将模型绑定到user.*并替换

$scope.mealPrice = '';
$scope.mealTax = 0.05;
$scope.tipPercent = 0.05;

与

$scope.user = {
    mealPrice: '',
    mealTax: 0.05,
    tipPercent: 0.05
};

解决方案B：

替换：

$scope.user = angular.copy(defaultForm);

与

$scope.mealPrice = defaultFrom.mealPrice;
$scope.mealTax = defaultFrom.mealTax;
$scope.tipPercent = defaultFrom.tipPercent;

$ setPristine（）不起作用。

3 个答案: