标签：rap warning stripe put php 控制 efault inpu blog
以我之前写的一个清单列表页面作为例子（MVC模式的清单列表效果），优化前代码如下：
<!DOCTYPE html>
<html ng-app="todoApp">
<head>
<meta charset="UTF-8">
<title>TO DO List</title>
<link href="./bootstrap/css/bootstrap.css" rel="stylesheet"/>
<link href="./bootstrap/css/bootstrap-theme.css" rel="stylesheet"/>
<script src="./angularJs/angular.js"></script>
<script>
var model = {
user:"Yimi",
items:[{action:"练车",done:true},
{action:"看课外书",done:false}]
};
var todoApp = angular.module("todoApp",[]);
todoApp.controller("ToDoCtrl",function($scope){ //以$开头的变量名表示AngularJS的内置特性
$scope.todo = model;
});
</script>
</head>
<body ng-controller="ToDoCtrl">
<div class="page-header">
<h1>{{todo.user}}‘s TO DO List</h1>
<span class="label label-default">{{todo.items.length}}</span>
</div>
<div class="panel">
<div class="input-group">
<input class="form-control"/>
<span class="input-group-btn">
<button class="btn btn-default">Add</button>
</span>
</div>
<table class="table table-striped">
<thead>
<tr>
<th>Description</th>
<th>Done</th>
</tr>
</thead>
<tbody>
<tr ng-repeat="item in todo.items">
<td>{{item.action}}</td>
<td>{{item.done}}</td>
</tr>
</tbody>
</table>
</div>
</body>
</html>效果如下：
想要为Done属性添加复选框，并与true/false的值同步，即达到以下效果： 
点击复现框会使右侧true/false的值同步变化。
只需要为复选框checkbox指定为与true/false同样的ng-model模型属性:
......
<tbody>
<tr ng-repeat="item in todo.items">
<td>{{item.action}}</td>
<td><input type="checkbox" ng-model="item.done"/></td>
<td>{{item.done}}</td>
</tr>
</tbody>
......即checkbox和true/false的模型均为”item.done”，只在原基础上加了一句<td><input type="checkbox" ng-model="item.done"/></td>从而达到双向绑定，同步变化的效果。
显示值为false的事项个数，需在控制器todoApp.controller内添加一个计数变量incompleteCount，称为”行为名“。
......
todoApp.controller("ToDoCtrl",function($scope){ //以$开头的变量名表示AngularJS的内置特性
$scope.todo = model;
$scope.incompleteCount = function(){
var count = 0;
angular.forEach($scope.todo.items,function(item){
if(!item.done){count++;}
});
return count;
}
});
......在使用显示待办事项数的标签中调用incompleteCount行为名：
......
<h1>{{todo.user}}‘s TO DO List</h1>
<!--添加ng-hide="incompleteCount() == 0"使未办事项数为0时不显示此标签-->
<span class="label label-default" ng-hide="incompleteCount() == 0">{{incompleteCount()}}</span>
......
效果如下：
因为使用了ng-hide=”incompleteCount() == 0”，所以当无待办事项时隐藏数量标签：
在控制器todoApp.controller中添加逻辑，设置一个根据待办事项数判定标签class属性的$scope.warningLevel行为:
......
todoApp.controller("ToDoCtrl",function($scope){ //以$开头的变量名表示AngularJS的内置特性
......
cope.warningLevel = function(){
return $scope.incompleteCount() < 2 ? "label-success" : "label-warning";
}
});
......然后为事项数标签添加ng-class=”warningLevel()”属性：
<span class="label label-default" ng-hide="incompleteCount() == 0" ng-class="warningLevel()">{{incompleteCount()}}</span>效果如下：
待办事项数 < 2时
待办事项数 >= 2时
在控制器todoApp.controller中添加逻辑，定义$scope.addNewItem使清单列表具有添加新项的功能：
todoApp.controller("ToDoCtrl",function($scope){ //以$开头的变量名表示AngularJS的内置特性
......
$scope.addNewItem = function(actionText){
$scope.todo.items.push({action:actionText, done:false});
}
});为输入框与Add按钮双向绑定用户所输入的数据actionText:
<div class="input-group">
<input class="form-control" ng-model="actionText"/>
<span class="input-group-btn">
<button class="btn btn-default" ng-click="addNewItem(actionText)">Add</button>
</span>
</div>效果如下（为了更美观，顺便把事项数标签向上移了点儿）：
<!DOCTYPE html>
<html ng-app="todoApp">
<head>
<meta charset="UTF-8">
<title>TO DO List</title>
<link href="./bootstrap/css/bootstrap.css" rel="stylesheet"/>
<link href="./bootstrap/css/bootstrap-theme.css" rel="stylesheet"/>
<script src="./angularJs/angular.js"></script>
<script>
var model = {
user:"Yimi",
items:[{action:"练车",done:true},
{action:"看课外书",done:false}]
};
var todoApp = angular.module("todoApp",[]);
todoApp.controller("ToDoCtrl",function($scope){ //以$开头的变量名表示AngularJS的内置特性
$scope.todo = model;
$scope.incompleteCount = function(){
var count = 0;
angular.forEach($scope.todo.items,function(item){
if(!item.done){count++;}
});
return count;
}
$scope.warningLevel = function(){
return $scope.incompleteCount() < 2 ? "label-success" : "label-warning";
}
$scope.addNewItem = function(actionText){
$scope.todo.items.push({action:actionText, done:false});
}
});
</script>
</head>
<body ng-controller="ToDoCtrl">
<div class="page-header">
<h1>{{todo.user}}‘s TO DO List
<!--添加ng-hide="incompleteCount() == 0"使未办事项数为0时不显示此标签-->
<span class="label label-default" ng-hide="incompleteCount() == 0" ng-class="warningLevel()">{{incompleteCount()}}</span></h1>
</div>
<div class="panel">
<div class="input-group">
<input class="form-control" ng-model="actionText"/>
<span class="input-group-btn">
<button class="btn btn-default" ng-click="addNewItem(actionText)">Add</button>
</span>
</div>
<table class="table table-striped">
<thead>
<tr>
<th>Description</th>
<th>Done</th>
</tr>
</thead>
<tbody>
<tr ng-repeat="item in todo.items">
<td>{{item.action}}</td>
<td><input type="checkbox" ng-model="item.done"/></td>
<td>{{item.done}}</td>
</tr>
</tbody>
</table>
</div>
</body>
</html>AngularJS学习笔记（2）——与用户交互的动态清单列表
标签：rap warning stripe put php 控制 efault inpu blog
原文地址：https://www.cnblogs.com/benmumu/p/9025144.html
