$emit,$broadcast,$on的用法
<div ng-controller="ParentCtrl as parent" class="ng-scope">
{{ parent.data }}
<div ng-controller="SiblingOneCtrl as sib1" class="ng-scope">
{{ sib1.data }}
</div>
</div>app.controller('ParentCtrl',
function ParentCtrl ($scope) {
$scope.$broadcast('parent', 'Some data'); // going down!
});
app.controller('SiblingOneCtrl',
function SiblingOneCtrl ($scope) {
$scope.$on('parent', function (event, data) {
console.log(data); // 'Some data'
});
});
app.controller('ParentCtrl',
function ParentCtrl ($scope) {
$scope.$on('child', function (event, data) {
console.log(data); // 'Some data'
});
});
app.controller('SiblingOneCtrl',
function SiblingOneCtrl ($scope) {
$scope.$emit('child', 'Some data'); // going up!
});
<div ng-controller="ParentCtrl as parent" class="ng-scope">
<div ng-controller="SiblingOneCtrl as sib1" class="ng-scope"></div>
<div ng-controller="SiblingTwoCtrl as sib2" class="ng-scope"></div>
</div>
$scope.$parent.$broadcast('myevent', 'Some data');
directive中与controller @ & = 传参的区别
<!doctype html> <html ng-app="MyModule"> <head> <meta charset="utf-8"> <link rel="stylesheet" href="css/bootstrap-3.0.0/css/bootstrap.css"> </head> <body> <div ng-controller="MyCtrl"> <greeting greet="sayHello(name)"></greeting> <greeting greet="sayHello(name)"></greeting> <greeting greet="sayHello(name)"></greeting> </div> </body> <script src="framework/angular-1.3.0.14/angular.js"></script> <script src="ScopeAnd.js"></script> </html>
var myModule = angular.module("MyModule", []); myModule.controller('MyCtrl', ['$scope', function($scope){ $scope.sayHello=function(name){ alert("Hello "+name); } }]) myModule.directive("greeting", function() { return { restrict:'AE', scope:{ greet:'&' }, template:'<input type="text" ng-model="userName" /><br/>'+ '<button class="btn btn-default" ng-click="greet({name:userName})">Greeting</button><br/>' } });
<!doctype html> <html ng-app="MyModule"> <head> <meta charset="utf-8"> <link rel="stylesheet" href="css/bootstrap-3.0.0/css/bootstrap.css"> </head> <body> <div ng-controller="MyCtrl"> <drink flavor="{{ctrlFlavor}}"></drink> </div> </body> <script src="framework/angular-1.3.0.14/angular.js"></script> <script src="ScopeAt.js"></script> </html>
var myModule = angular.module("MyModule", []); myModule.controller('MyCtrl', ['$scope', function($scope){ $scope.ctrlFlavor="百威"; }]) myModule.directive("drink", function() { return { restrict:'AE', scope:{ flavor:'@' }, template:"<div>{{flavor}}</div>" // , // link:function(scope,element,attrs){ // scope.flavor=attrs.flavor; // } } });
<!doctype html> <html ng-app="MyModule"> <head> <meta charset="utf-8"> <link rel="stylesheet" href="css/bootstrap-3.0.0/css/bootstrap.css"> </head> <body> <div ng-controller="MyCtrl"> Ctrl: <br> <input type="text" ng-model="ctrlFlavor"> <br> Directive: <br> <drink flavor="ctrlFlavor"></drink> </div> </body> <script src="framework/angular-1.3.0.14/angular.js"></script> <script src="ScopeEqual.js"></script> </html>
var myModule = angular.module("MyModule", []); myModule.controller('MyCtrl', ['$scope', function($scope){ $scope.ctrlFlavor="百威"; }]) myModule.directive("drink", function() { return { restrict:'AE', scope:{ flavor:'=' }, template:'<input type="text" ng-model="flavor"/>' } });
$applay & $digest
angularjs自带指令如ng-click，当点击时，AngularJS会将此function包装到一个wrapping function中，
然后传入到$scope.$apply(),你的function会执行，如果修改models会有一轮$digest循环，用来确保view也会更新。
$digest循环中，watchers会被触发，当一个watcher被触发时，AngularJS会检测scope模型，如果它发生了变化那么关联到该
watcher的回调函数就会被调用。
$scope.$watch('aModel', function(newValue, oldValue) {
//update the DOM with newValue
}); 这里更新view
angular.module('myApp',[]).controller('MessageController', function($scope) {
$scope.getMessage = function() {
setTimeout(function() {
$scope.$apply(function() {
//wrapped this within $apply
$scope.message = 'Fetched after 3 seconds';
console.log('message:' + $scope.message);
});
}, 2000);
}
$scope.getMessage();
});
/* What happens with $apply */
