angluarJs与后台交互小案例

1、myService.html:

<!DOCTYPE HTML>
<html ng-app="app">
<head>
    <title>自定义服务与后台数据交互</title>
    <meta charset="utf-8">    
    <link rel="stylesheet" href="../css/bootstrap.css">
    <script src="../js/angular.js"></script>
    <style>
    .tip{background: #f2f2f2;border-radius: 6px;box-shadow: 2px 2px 4px #777; 200px;height: auto;position: relative;top:-10px;padding: 10px;}
    </style>
</head>
<body>
    <div ng-controller="myServiceCtrl" ng-click="hideTip()">
        <label>用户名</label>
        <input type="text" ng-model="username" placeholder="请输入用户名..."/>
        <div ng-show="showld" ng-class='{tip: showld}'>
            <p ng-repeat="user in users">{{user.name}}</p>
        </div>
    </div>
<script src="myService.js"></script>
</body>
</html>
2、myService.js:

var myModule = angular.module("app",[]);
myModule.service('userListService', ['$http', function($http){
    var doRequest = function(username,path){
        return $http({//底层其实还是$http的交互
            method:'GET',
            url:'data.json'
        });
    }
    return{//一层一层的封装
        userList:function(username){
            return doRequest(username,'userList');
        }
    }
}]);
//上面封装的服务其实就是众多controller中与后台文件交互,得到数据的共同代码,提取出来单独封装在公共服务模块里,供后面的控制器直接调用而已
myModule.controller('myServiceCtrl', ['$scope','$timeout','userListService', //注入除作用域外的定时器对象和自定义的服务,注意:angular系统自带的都是带$符的,自定义的是不带$符的
    function($scope,$timeout,userListService){
        var timeout;//定义延迟变量
        $scope.showld = false;
        $scope.watch('username',function(newUserName){//监察username,一旦username发生变化,就执行后面的function()函数
            if (newUserName) {//如果拿到新用户名,就用自定义服务中的方法进行处理
                if (timeout) {//一旦timeout里面有定时器id
                    $timeout.cancel(timeout);//就清除已经生成过的定时器,cancel()相当于clearTimeOut()方法
                }
                timeout = $timeout(function(){
                    userListService.userList(newUserName)
                    .success(function(data,status){
                        $scope.users = data;
                        $scope.showld = true;
                    });
                },350);
            };
        });
        $scope.hideTip = function(){//点击就隐藏提示框,注意不要放在控制器之外了,否则无效
            $scope.showld = false;
        }
    }
]);
原文地址:https://www.cnblogs.com/xiufengchen/p/10413465.html