为了降低前端代码的数量，提高可维护性，可测试性，学习了下AngularJS，正在准备投入项目开发中。
AngularJS的概念比较多，如果面向对象方面的书理解的不透的话学习起来有些费劲，它的官方有个快速入门不错，中文版如下
http://www.ituring.com.cn/minibook/303
但除了入门外，要真实的写项目还是得把模块划分，依赖关系处理，组件间通信，文件目录安排等问题解决好才能干活。
根据这个学习目的，写了个DEMO，地址如下
http://onlytiancai.github.io/codesnip/angular-demo1.html
HTML代码
<!doctype html> <html ng-app="myApp"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <script src="angular.js"></script> <script src="angular-demo1.js" charset="utf-8"></script> <title>AngularJS Demo</title> </head> <body> <p common:error_msg></p> <p ng-controller="statusCtrl">一共有{{apple_count}}个苹果，{{orange_count}}个桔子。</p> <fruits> <apple ng-repeat="n in [] | range:apple_count"></apple> <orange ng-repeat="n in [] | range:orange_count"></orange> </fruits> <p ng-controller="inputCtrl">请输入 <input type="text" ng-model="apple_count" />个苹果， <input type="text" ng-model="orange_count" />个桔子 </p> </body> </html>
js代码
angular.module('common', []);
angular.module('common').directive('commonErrorMsg', function(){
return {
restrict: "A",
controller: function ($scope, $element, $attrs) {
$element.css('color', 'red');
$scope.$on('common.showerror', function (ev, msg) {
$element.html(msg);
});
}
}
});
var myApp = angular.module('myApp', ['common']);
myApp.directive('fruits', function(fruitsService) {
return {
restrict: "E",
transclude: true,
replace: true,
template: '<ul ng-transclude></ul>',
controller: function ($scope, $element, $attrs) {
$scope.$on('fruitsService.updated', function () {
$scope.apple_count = fruitsService.apple_count;
$scope.orange_count = fruitsService.orange_count;
});
}
}
})
.directive('orange', function() {
return {
restrict: "E",
template: '<li>桔子</li>'
}
})
.directive('apple', function() {
return {
restrict: "E",
template: '<li><a ng-click="show()" href="#">苹果</a></li>',
link: function(scope, element, attrs) {
scope.show = function(){
alert('我是一个苹果');
};
}
}
})
.controller('statusCtrl', function($scope, fruitsService) {
$scope.$on('fruitsService.updated', function () {
$scope.apple_count = fruitsService.apple_count;
$scope.orange_count = fruitsService.orange_count;
});
})
.controller('inputCtrl', function($scope, fruitsService, $rootScope) {
$scope.$watch('apple_count', function (newVal, oldVal, $scope) {
if (newVal > 10){
$rootScope.$emit('common.showerror', '苹果数量太多了');
}else{
fruitsService.set_apple_count(newVal);
}
}, true);
$scope.$watch('orange_count', function (newVal, oldVal, $scope) {
if (newVal > 10){
$rootScope.$emit('common.showerror', '桔子数量太多了');
}else{
fruitsService.set_orange_count(newVal);
}
}, true);
fruitsService.set_apple_count(3);
fruitsService.set_orange_count(2);
})
.filter('range', function() {
return function(input, total) {
total = parseInt(total);
for (var i=0; i<total; i++)
input.push(i);
return input;
};
})
.service('fruitsService', function ($rootScope) {
this.set_apple_count = function (apple_count) {
this.apple_count = apple_count;
$rootScope.$broadcast('fruitsService.updated');
};
this.set_orange_count = function (orange_count) {
this.orange_count = orange_count;
$rootScope.$broadcast('fruitsService.updated');
};
});
下面这篇帖子也很好，关于如何用AngularJS开发大型项目的。
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