Angular-UI Bootstrap提供了许多组件，从流行的的Bootstrap项目移植到Angular 指令（显著的减少了代码量）。如果你计划在Angular应用中使用Bootstrap组件，我建议细心检查。话虽如此，直接使用Bootstrap，应该也是可以工作的。
Angular controller可以共享service的代码。警报就是把service代码共享到controller的很好用例之一。
Angular-UI Bootstrap文档提供了下面的例子：
view
<div ng-controller="AlertDemoCtrl">
<alert ng-repeat="alert in alerts" type="alert.type" close="closeAlert($index)">{{alert.msg}}</alert>
<button class='btn' ng-click="addAlert()">Add Alert</button>
</div>controller
function AlertDemoCtrl($scope) {
$scope.alerts = [
{ type: 'error', msg: 'Oh snap! Change a few things up and try submitting again.' },
{ type: 'success', msg: 'Well done! You successfully read this important alert message.' }
];
$scope.addAlert = function() {
$scope.alerts.push({msg: "Another alert!"});
};
$scope.closeAlert = function(index) {
$scope.alerts.splice(index, 1);
};
}鉴于我们要在app中的不同的控制器中创建警报，并且跨控制器的代码不好引用，我们将要把它移到service中。
alertService
'use strict';
/* services.js */
// don't forget to declare this service module as a dependency in your main app constructor!
var appServices = angular.module('appApp.services', []);
appServices.factory('alertService', function($rootScope) {
var alertService = {};
// create an array of alerts available globally
$rootScope.alerts = [];
alertService.add = function(type, msg) {
$rootScope.alerts.push({'type': type, 'msg': msg});
};
alertService.closeAlert = function(index) {
$rootScope.alerts.splice(index, 1);
};
return alertService;
});view
<div>
<alert ng-repeat="alert in alerts" type="alert.type" close="closeAlert($index)">{{ alert.msg }}</alert>
</div>最后，我们需要将alertService’s中的closeAlert()方法绑定到$globalScope。
controller
function RootCtrl($rootScope, $location, alertService) {
$rootScope.changeView = function(view) {
$location.path(view);
}
// root binding for alertService
$rootScope.closeAlert = alertService.closeAlert;
}
RootCtrl.$inject = ['$scope', '$location', 'alertService'];我不完全赞同这种全局绑定，我希望的是直接从警报指令中的close data属性中调用service方法，我不清楚为什么不这样来实现。
现在创建一个警报只需要从你的任何一个控制器中调用alertService.add()方法。
function ArbitraryCtrl($scope, alertService) {
alertService.add("warning", "This is a warning.");
alertService.add("error", "This is an error!");
}
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