个人中心
gpt4 book ai didi

angularjs - 为什么 $modal 会为表单引入额外的作用域？

转载 作者：行者123 更新时间：2023-12-04 23:51:01 24 4
gpt4 key购买 nike

我已经设法使用 angular-ui-bootstrap 中的示例来演示问题(但您需要打开控制台才能看到它)Plnkr link to this code

为什么表单卡在子范围而不是 $scope 中？

HTML 

<!doctype html>
<html ng-app="plunker">
  <head>
    <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.8/angular.js"></script>
    <script src="http://angular-ui.github.io/bootstrap/ui-bootstrap-tpls-0.10.0.js"></script>
    <script src="example.js"></script>
    <link href="//netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
  </head>
  <body>

<div ng-controller="ModalDemoCtrl">
    <script type="text/ng-template" id="myModalContent.html">
        <div class="modal-header">
            <h3>I'm a modal!</h3>
        </div>
        <div class="modal-body">
          <ng-form name="myForm">
            <ul>
                <li ng-repeat="item in items">
                    <a ng-click="selected.item = item">{{ item }}</a>
                </li>
            </ul>
            Selected: <b>{{ selected.item }}</b>
          </ng-form>
        </div>
        <div class="modal-footer">
            <button class="btn btn-primary" ng-click="ok()">OK</button>
            <button class="btn btn-warning" ng-click="cancel()">Cancel</button>
        </div>
    </script>

    <button class="btn btn-default" ng-click="open()">Open me!</button>
    <div ng-show="selected">Selection from a modal: {{ selected }}</div>
</div>
  </body>
</html>

** Javascript ** 
angular.module('plunker', ['ui.bootstrap']);
var ModalDemoCtrl = function ($scope, $modal, $log) {

  $scope.items = ['item1', 'item2', 'item3'];

  $scope.open = function () {

    var modalInstance = $modal.open({
      templateUrl: 'myModalContent.html',
      controller: ModalInstanceCtrl,
      resolve: {
        items: function () {
          return $scope.items;
        }
      }
    });

    modalInstance.result.then(function (selectedItem) {
      $scope.selected = selectedItem;
    }, function () {
      $log.info('Modal dismissed at: ' + new Date());
    });
  };
};

// Please note that $modalInstance represents a modal window (instance) dependency.
// It is not the same as the $modal service used above.

var ModalInstanceCtrl = function ($scope, $modalInstance, items) {

  $scope.items = items;
  $scope.selected = {
    item: $scope.items[0]
  };

  $scope.ok = function () {
    console.log("The form in the $scope says: ", $scope.myForm);
    console.log("The form in the $scope.$$childTail says: ", $scope.$$childTail.myForm);
    $modalInstance.close($scope.selected.item);
  };

  $scope.cancel = function () {
    $modalInstance.dismiss('cancel');
  };
};

ng-form 不在我期望的 $scope 中，即使其他 $scope 项目在那里。表单嵌套范围的原因是什么(由 angular 添加用于表单验证)。

控制台的输出如下所示: 
The form in the $scope says:  undefined example.js:37
The form in the $scope.$$childTail says:  
Constructor {$error: Object, $name: "myForm", $dirty: false, $pristine: true, $valid: true…}

最佳答案

如果您没有在 $modal.open 上指定范围属性它需要 $rootscope。这是来自文档

scope - a scope instance to be used for the modal's content (actually the $modal service is going to create a child scope of a provided scope). Defaults to $rootScope



所以在调用之前设置范围 
 var modalInstance = $modal.open({
      templateUrl: 'myModalContent.html',
      controller: ModalInstanceCtrl,
      scope:$scope,
      resolve: {
        items: function () {
          return $scope.items;
        }
      }
    });

关于angularjs - 为什么 $modal 会为表单引入额外的作用域？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/22109988/

24 4 0
文章推荐： r - 从 ggplot2 geom_raster() 生成分色矩形
文章推荐： android - 将自定义 Android 11 内核加载到 AVD/模拟器
文章推荐： android - ionic /电容器 - PushNotiifcations - Android - “notification” + “data” 消息
文章推荐： PowerShell:查找确切的文件夹名称
行者123
个人简介

我是一名优秀的程序员,十分优秀！

滴滴打车优惠券免费领取
滴滴打车优惠券
全站热门文章
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com