Question

使用Angular JS创建我的待办事项列表应用时遇到了一些问题。我的HTML和Javascript代码如下：

HTML代码：

<!doctype html>
<html ng-app="todoApp">
<head>
    <script src="bower_components/angular/angular.min.js"></script>
    <script src="js/controller.js"></script>
    <style>
    .done-true {
      text-decoration: line-through;
      color: grey;
    }

    input:required {
    box-shadow:none;
    }
    </style>
</head>
<body>

<h2>Todo</h2>

<div ng-controller="TodoListController">

<form ng-submit="addTodo()" name="form">
    <input type="text" ng-model="todoText"  size="30" placeholder="add new todo here" required>
    <input class="btn-primary" type="submit" value="add"> 
</form>

<div>Incompleted : {{remaining()}}</div>
<div>Completed : {{todos.length - remaining()}}</div>

<a href="" ng-click="delete()">Delete</a>

<ul class="unstyled">
   <li ng-repeat="todo in todos | orderBy : $index:true">
       <button type="button" ng-click="remove()">&#10008;</button>
       <input type="checkbox" ng-model="todo.done">
       <span class="done-{{todo.done}}" ng-hide="editing">{{todo.text}}</span>
       <input type="text" ng-show="editing" ng-model="todo.text">
       <button type="submit" ng-hide="editing" ng-click="change(todo); editing === true">Edit</button>
       <button type="submit" ng-show="editing" ng-click="save(); editing === false">Save</button>
       <button type="submit" ng-show="editing" ng-click="cancel(); editing === false">Cancel</button>
    </li>
</ul>

<pre>NewField : {{newField | json}}</pre>
<pre>Todos : {{todos | json}}</pre>
</div>    
</body>
</html>

我的Javascript代码：

var app = angular.module('todoApp', [])

app.controller('TodoListController', ['$scope', function($scope) {
    $scope.todos = [];

    $scope.newField = {};

    $scope.addTodo = function() {
        $scope.todos.push({text:$scope.todoText, done:false});
        $scope.todoText = '';
    };

    $scope.remaining = function() {
        var count = 0;
        angular.forEach($scope.todos, function(todo) {
            count += todo.done ? 0 : 1;
        });
          return count;
        };

    $scope.delete = function() {
        var oldTodos = $scope.todos;
        $scope.todos = [];
        angular.forEach(oldTodos, function(todo) {
           if (!todo.done) $scope.todos.push(todo);
        });
    };

    $scope.remove = function(){
        $scope.todos.splice(this.$index, 1);
    };

    $scope.editing = false;

    $scope.change = function(field){
        $scope.editing = $scope.todos.indexOf(field);
        $scope.newField = angular.copy(field);
    }

    $scope.save = function(index) {
        $scope.todos[$scope.editing] = $scope.todos;
        $scope.editing = false;      
    };

    $scope.cancel = function(index) {
        $scope.todos[$scope.editing] = $scope.newField;
        $scope.editing = false;      
    };



}]);

这是我的问题：我的Todo清单仍然是空的。当我添加一个列表并单击编辑时，它没有显示编辑表单，保存和取消按钮（它只复制到NewField）。但是，当我添加第二个列表并单击编辑时，它显示了2列表中的编辑表单，保存和取消按钮（不仅是第二个列表）。为什么？我的代码出了什么问题？

我的保存按钮无效。当我在编辑表单中更改列表并单击“保存”时。清单被清空并放在其他清单的底部。为什么？

由于比利

Answer 1

问题出在$scope.editing切换。更新一行代码后，一切都开始运行良好。在$scope.editing = $scope.todos.indexOf(field)函数内更新$scope.editing = true至$scope.change;

＆＃13;

var app = angular.module('todoApp', [])

app.controller('TodoListController', ['$scope', function($scope) {
    $scope.todos = [];

    $scope.newField = [];

    $scope.addTodo = function() {
        $scope.todos.push({text:$scope.todoText, done:false, editing: false});
        $scope.todoText = '';
    };

    $scope.remaining = function() {
        var count = 0;
        angular.forEach($scope.todos, function(todo) {
            count += todo.done ? 0 : 1;
        });
          return count;
        };

    $scope.delete = function() {
        var oldTodos = $scope.todos;
        $scope.todos = [];
        angular.forEach(oldTodos, function(todo) {
           if (!todo.done) $scope.todos.push(todo);
        });
    };

    $scope.remove = function(){
        $scope.todos.splice(this.$index, 1);
    };


    $scope.change = function(field){
        var todoIndex = $scope.todos.indexOf(field);
        $scope.newField[todoIndex] = angular.copy(field);
        $scope.todos[todoIndex].editing = true;
    }

    $scope.save = function(index) {
      $scope.todos[index].editing = false;
      
    };

    $scope.cancel = function(index) {
        $scope.todos[index] = $scope.newField[index];      
    };



}]);

＆＃13;

<!doctype html>
<html ng-app="todoApp">
<head>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.22/angular.min.js"></script>
    <style>
    .done-true {
      text-decoration: line-through;
      color: grey;
    }

    input:required {
    box-shadow:none;
    }
    </style>
</head>
<body>

<h2>Todo</h2>

<div ng-controller="TodoListController">

<form ng-submit="addTodo()" name="form">
    <input type="text" ng-model="todoText"  size="30" placeholder="add new todo here" required>
    <input class="btn-primary" type="submit" value="add"> 
</form>

<div>Incompleted : {{remaining()}}</div>
<div>Completed : {{todos.length - remaining()}}</div>

<a href="" ng-click="delete()">Delete</a>

<ul class="unstyled">
   <li ng-repeat="todo in todos | orderBy : $index:true">
       <button type="button" ng-click="remove()">&#10008;</button>
       <input type="checkbox" ng-model="todo.done">
       <span class="done-{{todo.done}}" ng-hide="todo.editing">{{todo.text}}</span>
       <input type="text" ng-show="todo.editing" ng-model="todo.text">
       <button type="submit" ng-hide="todo.editing" ng-click="change(todo); todo.editing === true">Edit</button>
       <button type="submit" ng-show="todo.editing" ng-click="save($index); todo.editing === false">Save</button>
       <button type="submit" ng-show="todo.editing" ng-click="cancel($index); todo.editing === false">Cancel</button>
    </li>
</ul>

<pre>NewField : {{newField | json}}</pre>
<pre>Todos : {{todos | json}}</pre>
</div>    
</body>
</html>

＆＃13;

AngularJS待办事项列表应用程序

1 个答案: